KSI Directors

Richard Tangye, OBE


Richard is Chairman of KSI. Richard is currently the Principal of St. Dominic’s International School, Lisbon. His previous roles include, CEO of the STS Educational Group in Bangladesh and CEO of the International School Dhaka. He has been directly involved in building new international schools across Asia and is currently a member of the IB Asia Pacific Regional Council. He previously served as the Executive Director of the Council of International Schools (“CIS”) from 2004 to 2010.  Richard serves on the Boards of a number of international schools across the globe. Prior to joining CIS, Richard was the Chief Executive of the Restaurant Group for Jardine Matheson Holdings (one of the largest YUM brands franchisee with 300 restaurants across Asia), where he launched and operated businesses across the Asia-Pacific for sixteen years. Richard began his career as a teacher with VSO and then spent nine years in international management with SGS Group. He was educated at Winchester College and holds an MA in Economics and Politics from Cambridge.

Phokion Potamianos

Mr. Potamianos is the general partner of Sylvina Capital, a private family investment firm based in San Francisco, since 2010.  Mr Potamianos serves on a number of boards including the Gennadius Library/American School of Classical Studies, Knightsbridge Schools International and La Jolla Country Day School, and  the Sonnabend Collection Foundation.  He is a former board member of Numonyx Corp, MagnaChip Semiconductor,  AMI Semiconductor, and Velti Corp.From 2005-2010, Potamianos was a partner and a member of the investment committee of Francisco Partners, a $10 billion technology-focused private equity fund based in San Francisco. Before joining Francisco Partners, Potamianos was an investment banker and research analyst on Wall Street. He served as head of the UBS global semiconductor investment banking group with responsibilities in Europe, Asia and the Americas. Earlier in his career, from 1997-2000, he was an institutional investor ranked research analyst of Donaldson, Lufkin & Jenrette in New York City. Potamianos received a Master of Science in Economics from the London School of Economics and Political Science.

Dr. Donald Jeffrey Keller

Jeff was the Superintendent of the American School Foundation of Monterrey (ASFM) in Monterrey, Mexico from 1994 until his retirement in June of 2013.   ASFM is considered by many to be one of the top ten American International Schools in the world.  Jeff earned a B.A. in Economics from the University of Colorado and a Masters and Doctorate in Educational Administration from the University of Alabama. Jeff has been involved in international education since 1975. He has been the Headmaster of three different schools in Colombia, Guatemala, and Mexico. He has been President of the Tri-Association of American Schools (Colombia-Caribbean, Central America, and Mexico), President of ASOMEX (American Schools of Mexico), Chairman of the Latin American Committee of the Southern Association of Colleges and Schools and is currently a member of the Board of Trustees of AdvancED, the world’s largest school accrediting organisation.

William Russell

William is a founder of Knightsbridge School in London and serves as Chairman of the KS Board of Advisors. He is a former Managing Director of Merrill Lynch Securities and is currently an investor in a number of private businesses. He is a Governor of Adams Grammar and the Abraham Darby Academy, a Trustee of the Prostate Cancer UK. He was a previous Chairman of the Development Board of the Royal Court Theatre. He was educated at Eton College and Durham University.


George Attard-Manche

George is a non-executive director of KSI. George spent forty years serving in the British Army worldwide including a five year stint as the Defence Attaché in Bulgaria. He then spent nine years in Germany in Public Relations for the Ministry of Defence. George currently serves on the Boards of Foinavon SICAV PLC, Kincsem Ltd, Kincsem 2 Ltd and Wine Investments Ltd.


Alex Bezugly 

Mr Bezugly is a partner at Oakfield Capital Partners, a UK-based private equity firm. In 2011-2015, he was Head of Alfa Capital Partners, a private equity firm dedicated to the FSU and Turkey. Prior to joining ACP in 2008 as Managing Director, Mr Bezugly worked as Director of private equity at First Arrow and RIT Capital Partners, investment vehicles of Lord Jacob Rothschild. During his time at RIT, he was instrumental in setting up and co-managing private equity investments at TAU Capital, a listed investment fund, targeting Kazakhstan and Central Asia. In 1998-2002, Mr. Bezugly worked at M&A and Private Equity departments of Lehman Brothers in London. Mr. Bezugly commenced his career in 1996 with Creditanstalt Investment Bank in New York.  He received his BA in Economics with Honors from the Moscow State University (Lomonosov). Mr. Bezugly was scholar at the London School of Economics. He is a British/Russian national.

Mamoun Askari

Mamoun is CEO/CIO of Hasma Capital Advisors, a Single Family Office based in London and Hong Kong managing global investments portfolios across multiple asset classes, including fixed income, equities, hedge funds, private equity and real estate. Mamoun assumed this role in 2007. Prior to that, he was Managing Director and a Partner at Investcorp, in both London and New York, where he spent 16+ years investing in leveraged buyouts. He began his career at Deloitte Haskins & Sells in London. Mamoun received a BA from Dartmouth College and his MBA from The Wharton School, University of Pennsylvania.