FIBR Advisors


Giselle Leung serves as a Director at the Global Impact Investing Network (GIIN), a not-for-profit organization dedicated to increasing the scale and effectiveness of impact investing. In this leadership role, she oversees development and ImpactBase (the GIIN’s searchable online database of impact investment vehicles), and manages relationships with key strategic partners. She was previously the founding manager of the GIIN Investors’ Council, a leadership group for active large-scale impact investors.

Prior to joining the GIIN, Giselle was Manager at Enterprise Solutions to Poverty (ESP), where she worked with leading companies in India, Colombia, Mexico and China to build inclusive business strategies that engage the poor in areas of agribusiness, microfinance and social enterprise. Giselle began her career at Cambridge Associates providing investment portfolio analysis to large non-profit endowments, and was a business strategy consultant at Braun Consulting. Giselle also served as a Peace Corps volunteer in Panama where she advised rural artisan groups on business operations, marketing and sales. Giselle holds an MBA and a Master of International Affairs from Columbia Business School and The School of International and Public Affairs, and a BA in psychology from Harvard University.



John Sheldon is Chief Revenue Officer/Chief Marketing Officer for FreshDirect. He joined FreshDirect in July 2017 as the next step in a career focused on driving innovation and change at major brands including MasterCard, Inc. and eBay Enterprise, Inc. In his latest role, John oversees all marketing activities and drives integration between all revenue-related functions for FreshDirect, FoodKick, and FreshDirect At The Office through a focused customer-centric mindset.

John specializes in providing the analytical rigor and process to help companies build and mature key capabilities. Prior to FreshDirect, he led Innovation at MasterCard Labs for more than 3 years where he was responsible for creating, developing, and managing the portfolios of innovation concepts that led to scaled businesses and products for Mastercard. Notably, he oversaw the launch of Mastercard Labs for Financial Inclusion (MCLFI) in Nairobi, Kenya and the implementation of a new digital marketplace for farmers in East Africa to sell their crops and handle payments. This lab was developed and launched with funding partnership from the Bill and Melinda Gates Foundation.

Prior to joining Mastercard, John held various positions at eBay Enterprise, including head of growth programs and head of strategy. In his career spanning innovation, digital marketing, and entrepreneurship, John launched dozens of ecommerce businesses and was a founding partner at Customer Portfolios, a digital CRM company in Boston. Throughout his career, John has been an innovation-driving business leader with deep expertise in business transformation, digital, and e-commerce, and has vast experience in all key marketing disciplines. John graduated from the Wharton School at the University of Pennsylvania with a Bachelor of Science degree in Economics. He currently resides in Chatham, NJ with his wife and two daughters.



Kwasi Donkor is Senior Policy Advisor for Digital Finance at USAIDKwasi leads the Digital Finance team’s Market Engagement work. The focus of this work involves looking for approaches to mainstream the use of digital financial services in priority country markets while working with partners and other US government agencies to stand up key market policy readiness infrastructure.   Prior to joining USAID Kwasi Donkor was based in Kampala, Uganda, where he oversaw Grameen Foundation’s Community Knowledge Worker program. Before joining the Foundation, he was responsible for driving specialized sales and channel management strategy for Tigo Cash, Millicom’s mobile money offering in Ghana. While at Millicom, he built the start-up commercial team that was responsible for launching and transforming Tigo Cash into a multiple award-winning product in Ghana and across West Africa. He was previously responsible for global sales and marketing strategy for Dun and Bradstreet’s enterprise and strategic customers. Kwasi began his career as an analyst in Merrill Lynch’s private client banking business. He received his MBA from the Wharton School at the University of Pennsylvania, where he was a Joseph Wharton Fellow. 



Marissa Drouillard is Senior Director at Caribou Digital. She is a researcher/consultant, avid globetrotter, and adventure sports enthusiast. After 11 years as a business and technology consultant, Marissa plunged into international development focusing on early-stage startups in Sub-Saharan Africa. She has advised mobile industry and international development organizations on digital entrepreneurship topics, including co-authoring several publications on entrepreneurship ecosystem development in emerging markets. Currently, she is developing a platform to channel funding and support to catalyze the growth of inclusive digital businesses and the next generation of technology leaders in Africa. Marissa has an MBA and a Certificate in Global Business from the Haas School of Business and a BSc from the College of Chemistry, all from the University of California at Berkeley, and an MSc in Public Policy with merit from the University of London, SOAS. She is Senior Director of Investment Advisory at Caribou Digital, a boutique consultancy working to build inclusive digital economies in emerging markets, and splits time between Cape Town, South Africa and Lake Tahoe, California.



Matthew Gamser is CEO of the SME Finance Forum, a center for knowledge exchange, good practice promotion and networking managed by IFC for the G-20 countries’ Global Partnership for Financial Inclusion.  He has over 35 years experience in private enterprise and financial sector development.  He has worked for IFC for 10 years in various positions, including heading the advisory services for the financial sector in East Asia-Pacific (from Hong Kong).  Prior to IFC he worked for 25 years in the private sector in management consulting and technology/small scale industry development.  He holds A.B. and A.M. degrees from Harvard University, and M.Sc. and D.Phil degrees from Sussex University (UK), where his work focused on the management of technological change.   



Nate Gonzalez is a Senior Product Manager at PayPal for cross-border P2P services and remittance products. Prior to joining PayPal, Nate was an Investment Officer with Accion Venture Lab, leading the team’s investment and portfolio management work in East Africa. He also worked at McKinsey & Company where he focused on the areas of payments, financial technology, consumer financial services, and financial inclusion. Nate received a bachelor’s degree from Vanderbilt University."




Olga Morawczynski is Program Manager for Financial Inclusion at Mastercard Foundation. Olga manages a portfolio of projects focusing on financial inclusion at Mastercard Foundation. She has spent close to a decade actively working in the financial inclusion sector. She has engaged closely with low income clients to better understand their financial needs, and financial service providers to design and scale impactful solutions. Olga has published her work widely, both through peer reviewed journals and industry focused publications. She has been cited by popular media periodicals, including CNN and the Economist. Olga has a PhD in Science and Technology Studies from the University of Edinburgh, and continues to actively innovate in the industry, engaging providers, regulators and customers to push the needle on financial inclusion.



Xavier Faz leads CGAP’s work on Digital Finance Frontiers, a global initiative that seeks to expand the application of financial technologies and digital delivery models to enhance financial solutions focused on the poor.  Mr. Faz’s work also includes exploring the link between financial inclusion and access to broader services. Mr. Faz manages CGAP’s work in Latin America.

Prior to CGAP, Mr. Faz was Director for Strategic Planning for a development bank in Mexico, where he developed a cloud based core banking platform focused on the Microfinance Sector, as well as a cards switch for non bank financial institutions.  Before, Mr. Faz was a consultant with McKinsey & Company where he worked with organizations in technology and business model innovation. He has a Master’s degree in Computer Science from Stanford University and an Engineering degree in Electronic Systems from the Instituto Tecnológico de Monterrey, México.