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Steven Mandis

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Adapted from the English Wikipedia article Steven Mandis, available under CC BY-SA 4.0Updated 8 August 2025
Steven Mandis
Born1970
Chicago, Illinois, U.S.
Occupation(s)Entrepreneur, investor, author, academic
Years active1992–present
Known forFounder of Kalamata Capital; adjunct associate professor at Columbia Business School; author of business and sports books

Steven George Mandis (born 1970) is an American entrepreneur and investor, known for founding Kalamata Capital. He holds a position as an adjunct associate professor specializing in finance and economics at Columbia University Business School. Mandis has held significant roles at Goldman Sachs, Citigroup, and acted as a senior advisor for McKinsey. He is the author of three notable works: What Happened to Goldman Sachs: An Insider's Story of Organizational Drift and its Unintended Consequences, The Real Madrid Way: How Values Created the Most Successful Sports Team on the Planet, and What Happened to Serie A: The Rise, Fall and Signs of Revival.

Early life and education

Born in Chicago, Illinois to Greek immigrant parents George and Theoni, Mandis spent his early years in both Chicago and Grand Rapids, Michigan. He completed his secondary education at Forest Hills Central High School. In 1992, he graduated with an A.B. degree from the University of Chicago. Following a 16-year tenure on Wall Street, Mandis pursued advanced academic credentials at Columbia University, earning an M.A. in Museum Anthropology in 2010, followed by an M.Phil in Sociology in 2013, and culminating with a Ph.D. in Sociology.

Business career

Mandis launched his professional journey at Goldman Sachs in 1992, initially working as a mergers-and-acquisitions banker. Subsequently, he transitioned to the proprietary trading division, where he contributed to the establishment of the Special Situations Proprietary Trading Group (SSG), operating under the leadership of Henry Paulson.

In 2004, he departed from Goldman Sachs to join Halcyon Structured Asset Management, an alternative asset management firm, remaining there until 2008. Later, he took on executive responsibilities at Citigroup, including serving as chief of staff to the president, and also provided strategic counsel as a senior advisor at McKinsey & Company.

Mandis founded Kalamata Capital in 2013, a small business financing firm funded with his personal investment, its name reflecting his parents' Greek roots.

Since stepping away from Wall Street in 2012, Mandis has been engaged as an adjunct faculty member at Columbia Business School.

Books

Mandis released What Happened to Goldman Sachs: An Insider’s Story of Organizational Drift and its Unintended Consequences in 2013 through Harvard Business Press, a publication derived from his doctoral dissertation at Columbia. This work received the 2014 Gold Axiom Business Book Award for Corporate History.

His 2016 publication, The Real Madrid Way: How Values Created the Most Successful Sports Team on the Planet, was published by BenBella Books. This book inspired a documentary aired by BBC Radio World Service and earned the 2017 International Book Award for Sports.

In 2018, Mandis authored What Happened to Serie A: The Rise, Fall and Signs of Revival, detailing the history of Italy’s professional football league, which was published by Arena Sport.

Personal life

Currently residing in New York City, Mandis was honored with an Ellis Island Medal of Honor in 2012.

External links