Challenging the humanitarian community to develop new and innovative ways of working.


GEG provides the highest quality services because we match skilled and experienced professionals to each project. In addition to our core staff, we bring members of our ‘Surge Network’ of humanitarian and business Subject Matter Experts with years of diverse global experience into our project teams. These experts bring evaluation, logistics & supply chain, strategic planning, response, disaster planning, disaster risk reduction, security, business, administration, finance, human resources, gender, media relations and language skills, as needed by our clients. To become part of our ‘Surge Network’, apply here →.

Core Team

Langdon Greenhalgh
Langdon GreenhalghManaging Director and Co-Founder
  • Humanitarian Operations Management
  • Operational and Organizational Strategy
  • Project Management
  • Monitoring, Evaluation & Learning
  • Debris Management
  • Disaster Risk Reduction
  • Supply Chain & Logistics
  • Innovation and Entrepreneurship
  • Training, Mentoring and Coaching
  • Risk Management
  • Financial Analysis
  • Human Resources

Langdon Greenhalgh has more than 17 years of humanitarian response and consulting experience working with a diverse group of governmental, international and non-governmental clients on humanitarian projects. He is a professional international emergency response manager who has served as team leader for the Red Cross and other organizations in a wide range of emergency response operations in the Americas, Africa, Asia and Europe. Previous to his work as a humanitarian consultant, Langdon served within the International Disaster Response Unit of the American Red Cross and was responsible for ensuring the delivery of high-impact emergency services globally. Prior to this Langdon was Executive Director of Horizon Institute for Policy Solutions, a Virginia based think-tank. Langdon completed his undergraduate work in Government and Foreign Affairs from the University of Virginia and received his Masters Degree from Harvard’s Kennedy School.

Iain Logan
Iain LoganDirector and Co-Founder
  • Disaster Response and Recovery Operations Coordination
  • Emergency Operations Surge Capacity Provision
  • Strategic Disaster Risk Reduction and Risk Management Consulting
  • Contingency and Continuity of Operations Design and Planning
  • Leadership and Team Training and Mentoring
  • Humanitarian Safety and Security
  • Operations and Project Monitoring and Evaluation
  • High level agency representation

Iain Logan has more than 25 years of experience as a senior disaster response manager and humanitarian consultant. His first exposure to a humanitarian action was in 1964 in the former Belgian Congo. In 1990 he was recruited into the International Red Cross through the Canadian Red Cross at the outbreak of the first Gulf War. An expert in international humanitarian assistance in complex, conflict and natural disasters, he served with the Red Cross in over 50 countries. He has held many high-level field and HQ positions in the International Federation of the Red Cross & Red Crescent Societies (IFRC), heading operations in major disasters and conflicts in Ethiopia, Somalia, Rwanda, Zaire, Southern Africa, Bougainville in Papua New Guinea and Lebanon; earthquakes in Iran, Haiti, Pakistan, India & Algeria, and most recently in Nepal; Hurricanes including Mitch, Ivan and Katrina and the Indian Ocean and PNG Tsunamis. He began his career with the IFRC as a Relief Administrator and served as Head of Delegation in many countries and as Operations Liaison at the IFRC UN delegation in New York. He completed his service as Head of Global Operations Coordination and Disaster Management Development and Special Projects. He has consulted and is a trainer in the above disciplines for the Red Cross Red Crescent Movement,the UN, government and for various INGOs. Raised and educated in East Africa, he is fluent in Swahili and also speaks French and Spanish; he holds a Diploma in Agriculture from the University of Edinburgh, School of Agriculture. He is a recipient of the prestigious Canadian Meritorious Service Medal (MSM) for actions in the 1994 Rwanda Conflict.

Aliisa Paivalainen
Aliisa PaivalainenDirector of Client Engagement
  • Project Management
  • Humanitarian Response Coordination and Management
  • Training and Capacity Building
  • Team Leadership
  • Disaster Preparedness and Risk Reduction
  • Quality Assurance
  • Partnership Development
  • Simulation Coordination

Aliisa Paivalainen has significant project management and business development experience in a variety of sectors and with diverse clients. Her previous work experience includes private firms, faith-based organizations, academic institutions, NGOs and the United Nations System. She has worked in the field as well as HQ, with a focus on project coordination and overall quality assurance. She has worked in Africa, Asia-Pacific, Europe and North America and is passionate about creating better systems to enhance emergency preparedness mechanisms for local, regional and international actors. At the United Nations in Geneva, she worked with the OCHA’s Surge Capacity section to help in the design, delivery and administration of training courses for surge personnel, both for OCHA staff and Stand-By Partners. Her previous experience also includes consulting with OCHA Emergency Preparedness section focused on improving OCHA’s internal preparedness structures and partnerships. She completed her undergraduate degree in Political Science from the University of Alberta and received her Master’s Degree from the University of Queensland in Peace and Conflict Resolution.

Jo Fox
Jo FoxDirector of Resourcing, Communications and Special Projects
  • Broad communications focus within international emergency relief and sustainable development
  • Systemic Change
  • Strategic Planning
  • Management
  • Team Leadership
  • Campaigning including Mobilisation
  • Policy Development and Advocacy
  • Communications and Media
  • Multi-stakeholder Processes
  • Cross sector partnerships
  • Community engagement

Jo Fox has almost 30 years’ experience in humanitarian emergency response and development, including campaigning, working within the Red Cross and Red Crescent Movement and International NGO’s Oxfam and Greenpeace, where her focus encompassed a broad spectrum of communications work spanning operational and organisational knowledge management, media and campaigning, including policy, advocacy, mobilisation and training increasingly at the global strategic level. In 1990 she was recruited as Desk Officer for the British Red Cross then became a delegate within the Red Cross Movement – Federation of Red Cross and Red Crescent Societies (IFRC) and the International Committee of the Red Cross (ICRC) – for 10 years working in over 18 countries in Africa with postings in Geneva, Eastern Europe and India. This included two years in Ethiopia at the end of the war as Information Delegate 91-93, two years as Regional Communication Delegate in East Africa including a year in Somalia in 1993 and as in situ spokesperson during the first months of the genocide in Rwanda 94, and 5 years as ICRC Regional Communications Delegate based in southern Africa covering 15 countries. From 2002-2006, as Trade Campaign Manager for Oxfam UK, then Mobilisation Manager, she was responsible for conceptualising and leading Oxfam International’s first global mobilisation, resulting in 18 million people in 55 countries mobilising to make trade fair at the World Trade Organisation. From 2006 as Head of Campaigns and Policy for Oxfam Ireland she introduced one programme into the organisation, focussing on economic justice and climate change. From 2014, as Head of Campaigns for Greenpeace New Zealand she was responsible for the GPNZ 3 year strategic plan around climate change and the fossil fuel agenda. Jo grew up in the UK and has a BA Hons MA in Archaeology and Anthropology from the University of Cambridge.

Margaret Bacon
Margaret BaconAssociate, Client Engagement
  • Project Management
  • Business Development
  • Data Analysis
  • Humanitarian & Security Field Training Administration
  • Humanitarian Response Coordination and Support
  • Monitoring & Evaluation
  • Simulation Coordination
  • Communications & Media Support

Margaret Bacon brings a variety of skills including project management, business development, data analysis, and communications to the GEG team. Having interned for GEG during her undergraduate studies, Margaret joined Global Emergency Group full-time in 2016 as an associate. She now works in a variety of client projects, supports business development, and provides administration and simulation coordination for GEG’s humanitarian and security trainings.  Since 2016, she has worked both in the field (Africa and the Caribbean) as well as HQ, substantiating her experience in humanitarian operations, monitoring and evaluation, and training administration and coordination.  Additionally, she supports communications and marketing for GEG. Margaret received her bachelor’s degree from Davidson College where she completed a major in French and Francophone Studies and a minor in Economics.

Natalie Greenhalgh
Natalie GreenhalghAdministrator and Training Support
  • Humanitarian & Security Field Training Administration
  • Community Liaison & Curricular Support
  • Human Resources & Surge Network
  • Recruiter, Internship Program
  • Contracting
  • Communications & Media Support

Natalie is an educator with broad experience in curriculum development, action research, and cultural exchange programs. She has traveled to Haiti as a GEG photographer and videographer for an evaluation of Canadian Red Cross shelters. She currently provides administrative support to GEG humanitarian and security field trainings. Natalie holds a B.A. in English from Washington and Lee University and a Masters in Teaching from the University of Virginia.

Key Surge Network Members

Hannah Vaughan-Lee
Hannah Vaughan-LeeResearch and Evaluation
  • Research and Analysis
  • Fragile and Conflict-Affected Contexts
  • Evidence-Based Approaches

A practitioner and researcher with more than 17 years in international humanitarian and development assistance, Hannah has worked with international and local NGOs, the International Red Cross and Red Crescent Movement, UN agencies, donors and academic institutions. An experienced researcher, Hannah has worked extensively in conducting and advising on research and analysis, including: systematic literature reviews; context, conflict and political economy analyses; systems mapping exercises; stakeholder and actor mapping; risk analyses; policy reviews; and identifying and operationalizing ‘lessons learned’ at HQ and field level. With expertise in qualitative methodologies, she also works with quantitative methods and frequently applies mixed methods in her projects. Complementing her research skills, Hannah also has a strong background in overall country management, program management, monitoring & evaluation, program design and training design and facilitation. Over the course of her career, Hannah has worked in various countries and regions including Africa, the Middle East, Europe and North America, with extensive fieldwork in conflict-affected and fragile countries. Hannah holds a PhD in Development Studies, from the School of Oriental and African Studies, University of London and an MSc in International Relations from the London School of Economics.

Drawing on her academic and practitioner experience, Hannah has developed strong subject matter expertise in: humanitarian aid, development aid, protracted crises, evidence-based approaches, access, accountability, corruption, conflict and state fragility. Highlights of projects from recent years include: Co-leading the research for Global Prioritization Exercise for Research and Innovation in the Humanitarian System (Elrha, 2017); leading research in how to improve scalability in DRR and developing scalability assessment tools (Save the Children, 2017-2018); leading corruption research and systems mapping exercises for fragile conflict-affected countries (CDA, 2013–2015); leading access research and implementing lessons learned (NRC, 2011–2013).

Tasneem Mowjee
Tasneem MowjeeMonitoring & Evaluation
  • Humanitarian Evaluations
  • Financing Mechanisms
  • Fragile and conflict-affected contexts
  • Donor Policy Development

Tasneem Mowjee has over 20 years of experience in humanitarian aid financing, evaluations and policy. She became involved in humanitarian assistance in 1993 through her work with WomenAid International, which was providing assistance to the former Yugoslavia. Tasneem specializes in financing mechanisms and has consulted for the United Nation’s Office for the Coordination of Humanitarian Affairs (OCHA). She has conducted country-level reviews of the value-added of the Central Emergency Response Fund (CERF), most recently in Sudan and Yemen, focusing on allocation processes and examining the internal processes of CERF-funded UN agencies. She has also evaluated OCHA-managed Common Humanitarian Funds and Emergency Response Funds. Tasneem has consulted for a number of donor agencies, including DFID, conducting an evaluation of its Humanitarian Innovation and Evidence Program, and evaluating the humanitarian strategies of Sida and Danida. Examining humanitarian-development linkages was an important part of the Sida and Danida evaluations and, in 2015, Tasneem undertook a study of humanitarian-development linkages in protracted crises. This was published by the Danish Ministry of Foreign Affairs under the title ‘Coherence in Conflict: Bringing humanitarian and development aid streams together’. Tasneem holds a PhD from the London School of Economics on DFID and ECHO funding for the humanitarian work of British NGOs.

Thierry Schweitzer
Thierry SchweitzerSupply Chain & Logistics
  • Logistics & Supply Chain
  • Operational Response
  • Disaster Preparedness and Response
  • Capacity Development & Training
  • Disaster Warehousing
  • Emergency Operations Centres

Thierry is a professional logistics and supply chain expert, part of the International Federation of Red Cross (IFRC) Field Assessment and Coordination Team (FACT), the British RC Emergency Response Unit (ERU) logistics and the British RC Household Economics Security (HES) surge team where he is a specialist in Emergency Market Mapping and Analysis (EMMA) and cash distribution. He has recently completed a Supply Chain Assessment for UNICEF in Somalia and has many years of country, regional and HQ logistics and supply chain management for several large humanitarian actors including working as an advisor to define country and regional logistic strategies. Thierry also reviewed the Certification in Humanitarian Logistics (CHL) for the Humanitarian Logistics Association (HLA)/Fritz Institute. This training won the European Supply Chain Excellence Award 2011. Most recently, he led the GEG capacity development, Emergency Operations and Warehousing development, training and mentoring program in Haiti that delivers US government funded Civil-Military capacity enhancing assistance to countries in the Americas.

“Throughout my time working with GEG I have found their consultants to be highly skilled and exceedingly capable at providing strategic relationship, fundraising and communications consulting services. Their deep experience within the humanitarian and private sectors added critical perspective to our business decision-making while adapting to the unique circumstances of the organization. Through their constant attention to client needs GEG has shown flexibility, willingness and ability to adapt to our most pressing needs while effectively staying on track to complete the original deliverables they were contracted to produce.”

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