Data Driven Strategies


How we work

Building on existing evidence, we apply qualitative, quantitative and mixed method approaches to answer the toughest questions.


We support clients to improve 
effectiveness and outcomes, maximize impact of investments, and drive the intersection between strategy, policy and advocacy.​

Our network includes professionals in public health, impact and outcomes research, product development
and introduction, performance management, monitoring,evaluation and advocacy.

Based in New York, with representation in New Delhi and Lisbon, the practice draws on experts from around the world.


What we do

Strategy and
business plan development

Performance indicators
and risk assessment

Program design
and policy analysis

for action

Leadership development


Selected projects

​Our clients are organizations working in health and global development that aspire to significantly impact the systems in which they operate.​
Private enterprise
Product developers
Not for profit and intergovernmental organizations
Private foundations

Adolescent health

Spark Street supported Plan International to develop the 
evidence base for its global advocacy work on adolescents
and NCDs
and adolescents and Universal Health Coverage, 
used as a centrepiece for
advocacy efforts with the UN General Assembly In New York.


Core team

Nina Schwalbe

Principal | New York

Nina founded Spark Street in 2019. She has held numerous leadership positions including as Managing Director for Policy and Performance at Gavi, the vaccine alliance, where she led Gavi’s work in strategic planning, policy development, market-shaping, performance management, and monitoring and evaluation. She also served as the principal advisor and acting chief of health at Unicef, overseeing their health programs in over 150 countries. 

Nina led the Policy team at Global Alliance for Tuberculosis Drug Development, where she focused on market access, product introduction and advocacy. She directed the global public health program for the Open Society Foundation and has worked for the Population Council and AVSC International (now Engender Health). She holds degrees from Harvard and Columbia Universities and teaches on the faculty at Columbia University’s Mailman School of Public Health. She is a lifetime member of the Council on Foreign Relations and currently serves as a Senior Fellow at the United Nations International Institute for Global Health and Chair of Gavi's Evaluation Advisory Committee.

Susanna Lehtimaki

Lisbon, Portugal

Brian Wahl 

New Dehli, India 

Susanna focuses on results-based program development, strategic planning, and analysis.
She has held positions with UNICEF in country and at headquarters and worked in maternal and child health in Finland and India. 

Brian is responsible for review of methods and quality control. Currently a faculty member at Johns Hopkins' Bloomberg School of Public Health, he has been based in South Asia since 2009 conducting research, policy and advocacy projects. 

Susanna holds a BA in Social Sciences and an MA in Public Health from Tampere University, Finland. She also has an MA in Russian and Eurasian Studies from European University in St. Petersburg and in addition to Finnish, is fluent in English and Russian. 

Brian holds an MPH in Epidemiological and Biostatistics methods and a PhD in Global Health and Epidemiology both from Johns Hopkins University. 
He has authored numerous peer-reviewed articles.

Anna-Carin Matterson

Carcès, France

Anna-Carin is a health policy and health system specialist. She started her career at the Swedish Ministry of Health and has served as a senior policy advisor to the Ministries of Health in Kenya and Zambia. Anna-Carin has managed the implementation of health programmes for Swedish Sida, the German GIZ, the European Union (EU) and the World Health Organisation (WHO). At Gavi, she worked on both policy development and evaluation, including developing Gavi's fragility and emergency, gender and risk policies. Anna-Carin holds a MSc in Health and Pharmaco- Economics and a BSc in Macro Economics. Anna-Carin is fluent in Swedish and English and has a working knowledge of French. 


Recent publications


As global and national policymakers deliberate approaches to achieving the SDGs, including for universal health coverage, the delivery of community-based interventions involving CHWs in urban settings should be strongly considered. 


Brian Wahl, Susanna Lehtimaki, Stefan Germann and Nina Schwalbe

Health Policy and Planning 2019


New York  |  Lisbon  |  New Delhi 

© 2019 by Spark Street Consulting