Senior Team


D.Skaleos ImageDimitris Skaleos, Partner

Mechanical engineer with Master’s degree in Business Administration (Tepper School of Business - Carnegie Mellon University). Athens College high school - Class of 1985. Certified "Financial Analyst" from the Hellenic Capital Markets Authority. Seasoned executive in international business development and cross-border M&A transactions with over 18 years experience in senior positions with Greek and multinational corporations. He has held senior positions as CFO of Hellenic Post SA, Business Development Manager at GE Capital and Corporate Planning Executive at Daimler-Benz AG as well as Corporate Finance Director at Greek brokerage firm Beta Securities. He has served at the BoD of listed Jumbo S.A. and Hellenic Post S.A. and he is a Member of the Board of Hellenic Credit Risk Management Association since 2009. He founded Sigmacatalyst Partners to focus on strategic M&A advisory and project financing in 2010.


starogiannisDimitris Starogiannis - External Advisor

Dimitris has a Masters Degree in Metallurgy & Industrial Engineering form MU Leoben/Austria and an MBA in Banking & Finance form Cass Business School, London/UK. He has 18 years experience in Banking, as he has worked for Eurobank, Credit Agricole and Alpha Bank in Non Pefroming Loans Management, Risk Management and Leasing. He has also worked as Financial & Marketing Analyst at American Bureau of Shipping Services and as Project Engineer at Siemens VAI. He recently teamed up with Sigma to assist in international assignments as NPL, corporate restructuring and workout strategies expert.

kontogourisphotoAlexandros Kontogouris, Senior Advisor

Alexandros has a Bachelors Degree in Accounting and Finance from The American College of Greece (Deree College). He has almost 30 years of experience in the food industry in Greece and in the USA. He has worked in food production, sales, promotions, marketing, branding, e-commerce, social media, imports, exports. He has worked as a consultant in expanding sales as well as business development in the US Market for food and non-food products. Alexandros joined Sigma Catalyst Partners as Senior Advisor in January 2016 and is currently responsible for business development in export oriented food/agri products sector.


 trezosMarinos Trezos, Senior Advisor

Marinos has a Baschelors Degree in Mathematical Sciences from the University of London and an MBA from Cardiff Business School/UK. He is currently CFA Candidate. He has 20 years experience in Finance and Management positions in Greece. His has worked for 12 years in CHANDRIS GROUP (shipping, hotels) in various roles incl. financial analysis, investment appraisal, M&A, debt refinancing, risk mangement and internal audit. His prior experience includes securities brokerage and investor relations. He is knowledgable in shipping and hospitality investments and has exposure in food retail (Everest Group). He joined Sigma as Senior Advisor in May 2018 and is currently responsible for business plans, evaluations and business development.


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Christos Sikolas, Consultant

Christos holds an MBA from Aston University and an undergraduate degree in marketing from Salford (UK). He is a seasoned business executive with diverse experience in many organizations and a licensed professional pilot (EASA). His background includes senior positions in the aviation and agricultural sectors, while serving in various trade association committees. He served as member of the GMO committee of the International Seed Testing Association, the Executive Committee of the International Federation of Seed Trade, committee for the Arbitration and Trade Rules and member of the ISF-OECD Committee. He has worked in various departments and eventually EASA positions as System Chief pilot, Director of Flight Operations and Crew Training Manager in public transport aviation companies. He has also served as Chief Operating Officer responsible for the Development and application of humanitarian-development aid to sub-Saharan African countries in cooperation with Governmental and non Governmental institutions and International Organizations. He cooperates with Sigmacatalyst Partners since March 2013 and focuses on new project development and international relations.

Sigma Catalyst Partners

5 Valaoritou Str. Athens - Chalandri 15232 - GREECE
Tel.: +30 210 68 52 411, Fax: 211 017 33 88

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