John Tsakatanis

John Tsakatanis is a seasoned finance professional with extensive experience in leadership roles across various organizations. Currently serving as Chief of Staff at Workable since November 2025, John previously held multiple senior finance positions at Hack The Box between March 2021 and October 2025, establishing and leading the Finance department to support significant growth post-Series A. As a co-founder of Tech Finance Network, John has fostered a community for tech finance professionals through events and networking opportunities. John's earlier career includes roles at Workable and Taxpedia Consulting, along with a strong educational background, featuring an MBA from Alba Graduate Business School and a Bachelor's in Accounting and Finance from Athens University of Economics and Business.