Executive Team

Sarah Perrine


Sarah Perrine is the Chief Executive Officer of the Trust for Social Achievement (TSA.) Prior to assuming this role in 2012, Sarah served for four years as Director of Programs for the Economically Disadvantaged with the America for Bulgaria Foundation (ABF). Under her leadership, the ABF established several of its flagship programs and awarded more than 50 grants supporting education and access to income for Bulgaria’s disadvantaged. In collaboration with ABF, Sarah launched TSA in order to develop a long-term strategy for engagement in this sphere. Sarah first came to Bulgaria in 1999 as a teacher with the United States Peace Corps. In 2002, she returned as a Fulbright fellow to conduct more specialized research on leadership trends and policies to promote social inclusion in Bulgaria. Over the past decade, she has acquired professional experience in the private, public, intergovernmental, and nonprofit sectors, including work with the U.S. State Department and the United States Agency for International Development (USAID). Sarah holds a Master of Public Policy from the Gerald R. Ford School of Public Policy and a Master of Arts from the Center for Russian, East European and Eurasian Studies at the University of Michigan, Ann Arbor, as well as a Bachelor of Arts (magna cum laude, Phi Beta Kappa) from Mount Holyoke College.

View more

Valentin Tapchev


Valentin Tapchev is responsible for directing the foundation’s financial operations, as well as accounting, financial planning, budgeting, financial reporting, and cash management. He is also involved with the operations management of the Foundation, working to direct every possible resource toward grant making, expanding contacts with stakeholders, and advocacy. His areas of expertise include accounting, payroll, strategic planning, financial management, analysis, and project management. His prior experience involves similar positions in financial and accounting firms in Bulgaria. Valentin has a BA degree in Business Administration and Management, an MA degree in Accounting and Financial Control from the University of Economics in Varna and a PRINCE 2 certificate in Project Management.

View more

Doriana Basamakova


Doriana Basamakova assists the CEO in facilitating effective decision making and acts as the “go to” person for all TSA administration issues. Prior to joining the executive team, she was the Chief Impact Evaluation Officer. Doriana has over 15 years of experience in the field of strategy, monitoring, evaluation, research, and program management in the private and NGO sectors. Prior to joining the foundation, Doriana was a part of the marketing team at Kraft Foods, where she managed the business unit’s marketing research activities and won the first ever regional SEEMA award for Bulgaria for significant contributions to the implementation of insights into strategy development. She was a Strategy and Analysis Consultant for the Investment Climate Advisory Services division of the World Bank and a Senior Program Manager at Volunteers for Economic Growth Alliance, where she identified sectors with economic growth potential. Doriana has an MBA from Georgetown McDonough School of Business and Bachelor of Arts from the University of the South, where she was a recipient of a full scholarship and graduated with honors. Doriana was a Habitat for Humanity volunteer in Jamaica, Net Impact Service Corps Consultant for FINCA International, and served on the board of Georgetown Women’s Leadership Initiative.

View more