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Our team

Nigel Tricks
ENN Chief Executive Officer

Nigel is a British humanitarian who has led international aid agencies in Africa and Asia for the last 30 years. He has overseen large scale humanitarian responses, including Concern Worldwide’s response to the 2005 Niger crisis as well as long term development programmes and campaigns for systemic change.

Previous to joining ENN, Nigel was based in Nairobi as the Norwegian Refugee Council’s Regional Director for East Africa and Yemen.

Technical Team

Marie McGrath
ENN Technical Director

Marie has been a Technical Director with ENN for 18 years and is also a member of ENN’s Board of Trustees. Marie is ENN’s technical lead on a growing portfolio of work on the Management of small & nutritionally At-risk Infants under six months & their Mothers (MAMI) including evaluation of an upcoming randomised control trial in Ethiopia in a LSHTM/GOAL/Jimma University partnership. Marie is Chair of the Advisory Board of the Eleanor Crook Foundation (ECF) and also the coordinator of an established UN/NGO interagency collaboration on infant and young child feeding in emergencies (IFE Core Group), co-chair of the Wasting Thematic Working Group of the Global Assistance Mechanism on Nutrition (GTAM), and a member of the Council of Research & Technical Advice on Severe Acute Malnutrition (CORTASAM) of the No Wasted Lives Initiative. Marie leads on, and contributes to, a wide range of normative (WHO) and programmatic guidance, such as HIV and infant feeding, HIV and infant feeding in emergencies, breastfeeding and Ebola, breastfeeding and Zika virus and Operational Guidance on Infant Feeding in Emergencies.

Marie studied Human Nutrition and Dietetics at Trinity College Dublin. She began her career as a Senior Paediatric Dietician before working for several years as an Emergency Nutritionist with Merlin and Research Nutritionist with UCL/Centre for Global Health and Save the Children. Her ambition through all her workstreams is to nurture practical common ground across humanitarian and development programming and sectors and to continue to learn; to that end, she is a part time PhD student at the London School of Hygiene and Tropical Medicine linked to her MAMI work portfolio in Ethiopia.


Tanya Khara
ENN Technical Director

Tanya joined ENN in 2017 bringing with her more than 20 years’ experience as a public health nutritionist spanning university research contexts, INGOs, Valid International, the UN, UK government, and as an independent consultant. She has an MSc in Public Health from the London School of Hygiene and Tropical Medicine and a BA in Human Science from Oxford University.

Tanya is driven by a desire to better shape and translate research into doable, effective and equitable programmes. As an integral member of the research team responsible for developing Community-based Management of Acute Malnutrition (CMAM) and subsequently driving the uptake of the approach within UNICEF, she was able to do exactly that. She subsequently broadened her focus, developing a number of technical reviews, exploring neglected areas in international nutrition, including maternal and adolescent nutrition, and the relationship between wasting and stunting, always highlighting key opportunities for improvements in programming and policy.

Tanya is ENN’s technical lead on our body of work on the relationship between Wasting and Stunting, including our USAID supported study in West Africa, the knowledge management and monitoring of the Global Technical Assistance Mechanism for Nutrition (GTAM), with whom she works closely with partners in UNICEF and World Vision, and also leads ENN’s resource forum for field practitioners, en-net.


Anne Walsh
Senior Technical Specialist

Anne has over 25 years of experience in the humanitarian relief and development sector, specialising in nutrition and public health. She is a registered nurse with a master’s degree in public health.

She has worked extensively across Africa and Asia covering multisectoral emergency relief and development programmes as Programme Director and Senior Health Advisor for Children’s Aid Direct and as Director of Programmes for Valid international (managing technical assistance and operational research into treatment of acute malnutrition and bringing about the WHO endorsement and international mainstreaming of community based management of acute malnutrition).

Since 2017 she has been working for The Power of Nutrition as the Senior Nutrition Specialist. 


Dr Philip James
Senior Technical Associate

Philip is an ENN Senior Technical Associate working across ENN’s portfolio, with specific focus on wasting and stunting, maternal nutrition, and management of acute malnutrition in infants. 

Over the past 18 years Philip has split his time between humanitarian and academic work in the maternal and child health and nutrition fields. He holds a PhD and MSc. in public health nutrition from the London School of Hygiene & Tropical Medicine (LSHTM). Prior to joining ENN Philip was an Assistant Professor at LSHTM, where his research focussed on the prevention of undernutrition. His doctoral work with MRC Gambia included the design and testing of a novel maternal micronutrient supplement. During his post-doctorate studies he supported clinical trials in India (nutrition-related behaviour change communication) and Nepal (maternal anaemia prevention). He co-organised LSHTM’s Nutrition in Emergencies MSc. module, and has been a lecturer for Masters courses at LSHTM, UCL and Nagasaki University. 

Prior to his LSHTM work, Philip spent 10 years working on projects spanning community development, agricultural, environmental, disaster management and food security with various NGOs, mainly in sub-Saharan Africa. During this time, he worked as an emergency nutrition coordinator for Action Against Hunger, a Country Representative for Valid International’s research on acute malnutrition in Ethiopia, and a disaster management officer for Tearfund. 

Philip’s ongoing research interests with ENN include how best to prevent undernutrition by focussing on maternal nutrition status across the life cycle.


Nicki Connell MBE
Senior Technical Associate

Nicki Connell is a senior technical associate with ENN, and is Co-Editor of ENN’s flagship publication Field Exchange. She brings over 12 years’ experience to this role having qualified at the London School of Hygiene and Tropical Medicine with a MSc in Public Health Nutrition, after obtaining a BSc in Natural Sciences from the University of Bath. In 2019, Nicki was recognised for her efforts in the nutrition sector through being awarded an MBE for services to emergency nutrition crises abroad.

Previously, Nicki worked for the Eleanor Crook Foundation as their Nutrition Technical Director, where her main area of focus was leading the ongoing development of ECF’s research and implementation grantmaking strategy.

Nicki has also held various positions with international non-governmental organizations, including Save the Children, GOAL Ireland and ACF, and has worked across multiple countries including Bangladesh, Pakistan, South Sudan, Yemen, Ethiopia, Sudan, Zimbabwe, Niger, Sierra Leone and Myanmar. Key technical areas of interest to Nicki throughout her career include Management of small & nutritionally At-risk Infants under six months & their Mothers (MAMI), Infant and Young Child Feeding in Emergencies (IYCF-E), and Community-Based Management of Acute Malnutrition (CMAM).

She has contributed to multiple publications including the ‘highly commended’ book Nutrition for Developing Countries (British Medical Association Book Awards 2016). 


Natalie Sessions
Senior Nutritionist

Natalie works with ENN as a Senior Nutritionist.  She is responsible for the global coordination of ENN’s Knowledge Management work for the Scaling Up Nutrition (SUN) Movement. The most significant of her responsibilities has been to oversee the development of a portfolio of case studies on sub-national, multi-sector nutrition programming. Natalie is part of the ENN team supporting knowledge management of the GTAM on nutrition and COVID-19 while working across several of ENN’s portfolio including co-authoring an ENN position on wasting in the context of undernutrition. She has particular interests in Wasting and Stunting, the Humanitarian and Development nexus of Nutrition programming and in situating Nutrition within the broader Humanitarian and Development landscape.

Natalie has an MSc in Public Health Nutrition from the London School of Hygiene and Tropical Medicine. Before joining ENN, she worked internationally for Concern Worldwide as an Emergency Nutrition Programme Manager, spending most of her time in South Sudan and Bangladesh, with Action Against Hunger UK and held nutrition roles with Philani Maternal Nutrition centre in South Africa and GOAL Ethiopia. Prior to this, Natalie worked in the field of HIV/ AIDS in Southern Africa.


Dr. Natasha Lelijveld
Senior Nutritionist

Natasha is an ENN Senior Nutritionist working across ENN’s portfolio, with specific focus on Adolescent Nutrition, MAMI, Concurrent wasting and stunting (WaSt), and a new project on food systems.

Natasha completed her PhD at University College London, where her research considered the long-term effects of severe acute malnutrition in Malawi. She continued her research at the London School of Hygiene and Tropical Medicine (LSHTM) exploring interventions for the Management of small & nutritionally At-risk Infants under six months & their Mothers (MAMI)  and adolescent stunting. Natasha also spent time at the Hospital for Sick Kids in Toronto where she studied alternative treatment options for children with moderate acute malnutrition. She also taught the "Nutrition in Emergencies" course for Masters students at the University of Southampton.

Besides academia, Natasha has spent time working in a policy-steering position within the No Wasted Lives initiative at Action Against Hunger supporting research projects in Bangladesh, South Sudan, Kenya, and Mali. 


Thomas Stubbs
Field Exchange Sub-Editor and Content Coordinator

Tom is the Sub-Editor and Content Coordinator for ENN’s publication Field Exchange. Tom is a public health nutritionist by training, gaining an MSc in Human Nutrition from the University of Glasgow before completing a second MSc, in Epidemiology, at the London School of Hygiene & Tropical Medicine. Prior to joining ENN he worked as a nutrition consultant for a multidisciplinary healthcare clinic in the UK and spent time working on FCDO-funded development projects in Nigeria and South Africa.

Tom also has experience operating in a variety of roles within the public health/international development sectors, working with the University of Oxford, United Nations High Commissioner for Refugees, People’s Open Access Education Initiative, the National Health Service, and with asylum seekers in Calais.


Nicky DentNicky Dent
MAMI Global Network Coordinator

Nicky Dent is a nutritionist with more than 20 years of experience working in public health nutrition in a diverse range of emergency and development contexts. 

From community to global level, she has experience in programme design, implementation, and evaluation; policy and operational research; training and knowledge management. 

Over the years, she has concentrated on the prevention and treatment of malnourished infants and children and their mothers, including operational research with early community-based approaches. 

Nicky has an MSc in Nutrition and a post-graduate Diploma in Dietetics from King’s College, London. She has spent over 10 years living and working in various African countries, most recently in Ethiopia. She is currently a member of the WHO Wasting Guideline Development Group.


Nicky DentDima Ousta
IFE Core Group Coordinator

Dima is a public health nutritionist with more than 12 years of experience in low-, middle- and high-income countries.

She holds a B.Sc. in Nutrition & Dietetics from the American University of Beirut in Lebanon and an M.Sc. in Human Nutrition from McGill University in Canada.

Dima’s involvement in NiE and IYCF(-E) started in response to the Syria Crisis in Lebanon in 2012. She then went on to work in Serbia and Greece to assist with the Europe Refugee/Migrant Crisis in 2015-2016. Her experience in NiE and IYCF-E spans programme planning, management and evaluation, training, policy and procedure development. In 2016 she moved to Australia where she worked in health promotion at the municipal and health district level with New South Wales Health. In 2020 in response to the COVID-19 pandemic she took on leadership roles in active public health contact tracing and management. She held roles in various institutions and organisations such as academia, INGOs, UNICEF and government.

Her passion is in IYCF-E and is always looking for ways to continue contributing to this field at the global level – the opening of the IFE Core Group Coordinator position proved perfect timing. She has just relocated to Lebanon and is delighted to join ENN as IFE Core Group Coordinator to once again take up work in IYCF-E.


Amir SamnaniAmir Samnani

Amir Ali is a nutritionist with more than 8 years’ experience as a public health professional with expertise in Maternal and Child Health and Nutrition. Amir has also held various positions with public health departments and international non-governmental organisations such as Action Against Hunger, Nutrition International and UNICEF, in both development and humanitarian contexts. His last assignment was with UNICEF Pakistan, as an Integrated Service Delivery Consultant in polio super-high risk councils of Sindh Province, working to ensure integrated services to communities living with multiple deprivations.

He holds an  MSc in Health Policy & Management from the Aga Khan University, Pakistan and an MBA in Healthcare Management from Dow University of Health Sciences. Currently he is a PhD fellow of Population and Public Health from the Aga Khan University.

Amir has  expertise in CMAM programme planning and implementation, and experience in research & nutrition assessments including SMART surveys, Link NCA and IPC Food Security analysis for Chronic and Acute Food Insecurity and acute malnutrition. Amir also holds IPC level 2 certification for advance analyst, and Co-facilitator for Acute Food Insecurity  (IPC Version 3.0) awarded by IPC global support unit and IPC global steering committee.


Rachael Menezes

Rachael Menezes is a Nutritionist working across ENN's portfolio with a current focus on Infant Feeding in Emergencies (IFE). Rachael obtained her MSc in Nutrition for Global Health at the London School of Hygiene and Tropical Medicine and her previous work with ENN focused primarily on IFE, Management of small & nutritionally At-risk Infants under six months & their Mothers (MAMI), and Maternal Nutrition.

Rachael also currently works part time co-ordinating the Public Health England funded Change4Life intervention, aimed at improving health and nutrition outcomes of pregnant women and children under 5 years old across the most vulnerable London boroughs. This work is mainly concerning low-income families and refugees, implementing evidence-based resources to optimise maternal nutrition and facilitate expectant parents' understanding of nutrition requirements throughout pregnancy. Prior to this, Rachael has worked with drug and sex trafficking victims in a nutritional rehabilitation clinic in Portugal, specifically with adolescent mothers and their infants. She has also worked on community nutrition projects with the homeless, families and children  in Bournemouth.


 Anne Gitari

Senior Nutritionist

Anne works across different projects within ENN’s portfolio, the main one being support to the GNC Technical Alliance. Anne joined ENN in April 2024, and she brings over 12 years’ experience working in CMAM programming with different organizations including International Rescue Committee (IRC), Medair, Action Contre la Faim and Relief International across several country programs (Kenya, Afghanistan, South Sudan, Myanmar, Ethiopia, Madagascar, Bangladesh, DRC and Sudan). Her areas of expertise include technical leadership and quality oversight of programs focused on the management of acute malnutrition. Anne has an MPH (Human Nutrition) from Moi University, Kenya.

Technical Associates

Anne Bush

Anne has more than 20 years’ experience in public health and nutrition at global and country level in humanitarian and development contexts. She has worked in a wide range of countries including Kenya, Somalia, Mozambique, Tanzania, Ethiopia, Indonesia and the UK. She has significant experience in policy and strategic development, programme design, development of technical guidance and tools, monitoring and evaluation, quality assurance and research.

During her career, she has provided technical assistance to donors, governments, UN agencies and NGOs. Specific areas of interest include multisectoral approaches to addressing malnutrition, bridging the humanitarian – development divide, the integration of nutrition and health through system strengthening, and community-based approaches.

Anne’s recent work with ENN has included developing a case study on Zambia's experience with the 1,000 Most Critical Days Programme and editing of Field Exchange. Prior to her work in international public health and nutrition, Anne studied dietetics at Leeds University and worked in the National Health Service as a Metabolic Dietitian. Anne then worked for three years as a nutritionist in Indonesia, from where her career continued in the international field. Anne has an MSc in Public Health from the London School of Hygiene and Tropical Medicine.


Bridget Fenn

Bridget is an epidemiologist (MSc Epidemiology, LSHTM) with a background in nutrition (MSc Nutrition, King’s College, London). Bridget has 25 years’ experience in the development and humanitarian sectors working for national and international agencies in operational, political and academic capacities on child and maternal nutrition and health and environmental projects.

She has worked with ENN for a decade and has headed research programmes in Niger and Pakistan (REFANI-Pakistan). She is currently analysing data looking at the impact of interventions aimed at wasting, on stunting. She is also a consultant in Nutrition Epidemiology and Research for the Multi-Donor-Action ‘Capacity 4 Nutrition (C4N)’ where she is responsible for monitoring and depicting stunting trends in the EC’s priority countries for nutrition, providing guidance on research methods and current scientific knowledge to identify emerging innovative approaches and supporting the EC EU Delegations on the design of country-level research and evaluations.


Dr Kate Sadler

Kate is a public nutritionist with over 20 years of experience in the design, management, evaluation and research of nutrition interventions in Africa and Asia. She is currently ENN’s Study Coordinator and co- Principal Investigator for the Wasting-Stunting Study.

Kate has previously worked as a programme nutritionist in several countries in Africa, including Ethiopia, Malawi, Sudan, Rwanda and Burundi and has extensive applied research capacity in the area of nutrition and food security.

Kate gained her PhD in nutrition from UCL and was an integral part of the team responsible for the multi-country research on which the adoption of the CMAM approach (for the community-based management of acute malnutrition) was based. She has led many projects including the community case management of severe acute malnutrition in Bangladesh; linking livestock interventions to child health and nutrition in pastoralist areas of Africa; and the strengthening of nutrition across multi-sectoral programs (including HIV, health and livelihoods) in Ethiopia.  She also supports the EU’s Nutrition Advisory Service on programme and research related issues.


Mark Myatt

Mark is a consultant epidemiologist and is currently working with ENN as co-Principal Investigator for the Wasting Stunting Study. His areas of expertise include nutritional epidemiology, surveillance of communicable diseases, epidemiology of communicable diseases, spatial epidemiology, and survey design. Mark has undertaken work for the governments of the UK, USA, Ethiopia, Zambia, Malawi, Nigeria, and Sudan; the UK National Health Service and Public Health Laboratory Service; the Scottish Centre for Infection and Environmental Health; CDC (Atlanta); United Nations Organisations such as WHO, UNICEF, UNHCR, and WFP; ASEAN; and International NGOs such as Save the Children, CONCERN Worldwide, GAIN, GOAL, OXFAM, MSF, ACF/AAH, Merlin, FANTA, and VALID International. Mark has taught at several UK Universities (London (UCL, ICH, IoO, and LSHTM), Oxford, Liverpool, Manchester, and Glasgow) as well as at national schools of public health in Belgium, Estonia, Czech Republic, Portugal, Spain, Sweden, Switzerland, and the USA. Mark has authored several textbooks on epidemiology, statistics, and computing; a reference on food-borne disease; several computer programs for epidemiology and biostatistics; and has published over fifty articles in scientific and professional journals. In addition Mark has worked in many complex humanitarian emergencies over the past twenty-five years.


Tamsin Walters

Tamsin specialises in public health nutrition and food security technical support, analysis and policy and strategy development, as well as providing broader strategic thinking and support to multi-sectoral humanitarian programming approaches. With experience in 29 African and Central and Southeast Asian countries over almost 20 years, her knowledge includes a comprehensive understanding of development policy within global, regional and community contexts.

Tamsin is the moderator for ENN’s online technical forum, en-net, and is currently undertaking work to develop this forum. She also works on other projects for ENN and is continuously engaged in improvement of the knowledge base for nutrition through involvement in global technical meetings and research publications.

In addition to her position with ENN Tamsin is a partner in NutritionWorks, and an Honorary Lecturer at Bristol University. Previous organisational affiliations include Concern Worldwide, Action Contre la Faim (ACF) and Action Against Hunger UK, Oxfam, CAFOD and Caritas Internationalis.


Operations Team

Nicola Johnstone
Project Coordinator Lead

Holly Ruffhead
Project Manager

Natalie Naber
Finance Manager

Kathryn North
Human Resources Manager

Judith FitzGerald
Office Manager


Clara Ramsay
Finance Assistant

Laura Delfino
Project Officer

Lorraine Moore
Human Resources Officer

Hannah Fletcher
Projects and Communications Assistant


Board of trustees

Dr Graham MacKay – Chair

Graham Mackay is Chief Operating Officer at the Business & Human Rights Resource Centre in London, UK.

Graham’s background originally was in natural sciences where he gained a PhD in environmental science before moving into international development, where he has worked on programmes in more than 15 countries around the world. He was Oxfam’s deputy humanitarian director before moving into organisational management. Prior to joining the Resource Centre he was Chief Operating Officer at Bond, the UK’s membership organisation for International Relief and Development organisations.

Dr Jane Cocking – Trustee

Dr Jane Cocking has 25 years’ experience in the humanitarian sector and has responded to multiple crises across the world. She worked for the ODA and Save the Children before spending almost 20 years with Oxfam GB. She was Chief Executive at The Mines Advisory Group from 2017 to 2020.

Harish Jani – Treasurer

Harish Jani is a Chartered Accountant and has held senior finance positions in a number of companies. In his last position Harish looked after the finances of Crystal Palace Football Club. He also has an MBA from Cass Business School.

Megan Howe – Trustee 

Megan Howe is a communications specialist with experience working on humanitarian and development projects in multiple countries. She has also worked as a journalist and holds an MA in Journalism from City University London.

Currently, she works for a development consultancy as a Knowledge and Communications Specialist in global health. 

Carol Morgan – Trustee 

Carol has over 27 years of experience of working in senior management positions in fragile and conflict affected states, focusing on alleviating poverty. She is passionate about working with staff to reach their potential and about building effective relationships and partnerships to represent and promote humanitarian goals.

She currently holds the role of  International Programmes Director for Concern Worldwide, where she oversees and manages Concern’s engagement in long-term development work, emergency response in 24 countries of operation as well as providing support to fundraising, communications and advocacy activities.

Previously she was Regional Director for Concern Worldwide for the Horn of Africa and the Central Africa Regions, where she was responsible for the management, implementation and expansion of programmes, as well as Country Director for Uganda, Ethiopia and Rwanda. Carol is also a registered Nurse and Midwife. 

Sophie Healy-Thow – Trustee 

Sophie is a youth activist who promotes Food Security and Gender Equality. She is a Lead Group Member of the Scaling Up Nutrition Movement (SUN), serves on the Board of the leading international charity ActionAid UK and is the co-chair of the UN Food Systems Summit Youth Liaison group. She is the co-founder of Act4Food Act4Change and the Global Youth Campaigns Coordinator for the Global Alliance for Improved Nutrition (GAIN).

Sophie is one of the 10 women leaders featured in the Disney book ‘Choose to Matter’ by ESPN presenter Julie Foudy which encourages young women to find the leader within and was recognised by TIME magazine as one of the most influential teens. More recently she was named by Food Tank as a Young Person Inspiring Change Across the Food System. 

 Dr. Kavita Sethuraman - Trustee

Dr. Kavita Sethuraman joined ENN as a Trustee in April 2024, and has more than 20 years of experience working on maternal and child health and nutrition (MCHN), food security, and gender in community-based nutrition programs, policy-level analysis, program design and management, technical assistance, nutrition advocacy and capacity building in sub-Saharan Africa, Asia and the South Pacific. Most recently she served as Director for Nutrition in Humanitarian Contexts on USAID Advancing Nutrition project. Her technical expertise includes maternal and child health and nutrition, food security, qualitative and quantitative mixed method research, gender analysis, nutrition advocacy, social behavior change, and capacity building. She has a PhD in nutrition from the Institute for Global Health, University College London, UK, and a master’s in nutrition from the Friedman School of Nutrition Science and Policy at Tufts University in Boston.


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