Our team

Felicity joined Sphere in 2021. Prior to joining Sphere, she worked in education, tourism and heritage. Her roles have encompassed teaching, training and business development for the public and private sectors. She is co-founder and chair of Lake Aid, an association supporting displaced children and families in Annecy (France).

Felicity holds an M.A. in Classics and Art History from Cambridge University, a Post-Graduate Diploma in Museum Studies from the University of Leicester and a TEFL Certificate (Teach English as a Foreign Language). She speaks English and French.

Helen joined Sphere in 2025. Prior to joining Sphere, she worked in marketing and business development for multinational companies in Latin America and beyond. Her roles included project leadership, strategic negotiation, and coordination of initiatives with NGOs, government, and civil society. She is a co-founder of Red Verde de Venezuela and has led campaigns on environmental protection, public health, and children’s rights.

Helen holds a Master’s in Business Management and a Bachelor’s in International Affairs from the Central University of Venezuela. She speaks Spanish, English and French.

Tristan joined Sphere in 2017 as Learning & Training Manager, and held several positions before starting his current role in 2025. Prior to joining Sphere, he held various roles in the finance sector. He was a founding board member of Lake Aid, an association supporting displaced children and families in Annecy (France).

Tristan holds a degree in Computer Science from the University of Bath (United Kingdom), and since completed professional exams in accountancy (ACCA) and finance (CFA). He speaks English and French.

William has served as Executive Director of Sphere and the Humanitarian Standards Partnership since 2023. With more than 20 years of experience in humanitarian leadership, he has directed global disaster response operations both from head office and remote locations around the world. His career has included over a decade living in Zimbabwe and Kenya, and leading field teams across Central and West Asia.

William has extensive experience in humanitarian response, including for example working in South Sudan, Afghanistan, Lebanon, the Democratic People’s Republic of Korea, Ukraine, Ethiopia, Haiti, Bosnia and Herzegovina, Mozambique, Indonesia, Somaliland, and Iraq. His work is grounded in a commitment to justice and human dignity, with a focus on principled action in conflict-affected settings, people-centred assistance, conservation agriculture, innovation, and the protection of human rights.

He holds a Master of Theology from the University of St Andrews (Scotland) and a certification in Business Administration (Strategy) from the Open University. William speaks English and French.

Zunaira joined Sphere in September 2024. With over six years of experience in the humanitarian sector, she has a strong background in leading advocacy, visibility, and digital marketing initiatives. Prior to joining Sphere, Zunaira worked as the Communication, Visibility, and Marketing Lead at Community World Service Asia, where she managed international training programs and developed and implemented impactful communication strategies for a wide range of projects.

Zunaira holds an MBA degree in Marketing from Bahria University and a Master’s degree in Political Science from the University of Karachi. She is certified in Google Ads and Analytics. She speaks English and Urdu.