A modern secondaries firm.

Mustafa M. Siddiqui is the Founder and Chief Executive Officer of SQ Capital, responsible for oversight of the firm with a particular focus on supervising the evaluation and execution of investments.

Mustafa previously served as the Global Head of Blackstone GP Stakes from 2020 to 2024. Before this role, Mustafa served as a Senior Managing Director of Blackstone Private Equity, where he worked from 2009 to 2020. He began his private equity career at General Atlantic in 2002, followed by a brief stint in public markets. Earlier in his career, he was a consultant at McKinsey & Company.

Mustafa holds a BA magna cum laude from Harvard College, an MA from Harvard University, and an MBA with High Distinction (Baker Scholar) from Harvard Business School. He is a Member of the Council on Foreign Relations.

Michael Petryczenko is the Chief Financial Officer and Chief Compliance Officer of SQ Capital, overseeing financial operations, accounting, and tax strategy. He has over 27 years of experience in private equity finance and tax.

Michael has previously served as the CFO of Blackstone Strategic Partners, Blackstone’s secondary investment business. During his 16 years at Strategic Partners, he managed financial reporting, accounting, and tax structuring across various asset classes, including private equity, real estate, venture capital, and infrastructure. Most recently, he was the CFO of NewVest. He has also served as a Managing Director at PwC.

Michael holds a BS in Accounting from St. Francis College, an MS in Taxation from Pace University, and is a Certified Public Accountant (CPA).

Andrew is a Managing Director at SQ Capital, leading the firm’s investor relations and capital formation activities. He has over 21 years of experience in the private markets.

Before joining SQ Capital, Andrew was most recently the Head of Global Credit Investor Relations and, prior to that, the Head of Global Private Equity Investor Relations at Carlyle, where he spent 13 years. He was previously a Principal at Greenhill where he worked in the Private Capital Advisory Group and a Vice President at Lazard in the Private Fund Advisory Group, raising capital for a variety of middle-market private equity funds and providing advisory services to the private equity secondary market. Andrew began his career as an Analyst in High Yield Capital Markets at Salomon Smith Barney.

Andrew holds a BA in Economics from Washington and Lee University.

Henry is a Managing Director at SQ Capital, playing a leadership role in the evaluation and execution of investment opportunities. He has over 24 years of experience in private equity investing.

Henry was previously a Partner at Permira, a global private equity firm, where he spent 18 years and invested across a wide range of sectors. Prior to that, he was a Vice President at The Cypress Group and started his career as a Financial Analyst at Salomon Brothers.

Henry holds a BS summa cum laude in Finance from Georgetown University and an MBA from Harvard Business School.

Naiel Iqbal is an Operating Partner at SQ Capital, overseeing the development and execution of SQ Capital’s data science and AI capability.

Naiel was previously Head of Data and Research at Tiger Global Management, a global investment firm focused on venture capital and public markets, where he spent 10 years. He led a team of nine data scientists and researchers who built a world-class, data-driven insights platform. He was also responsible for developing new Generative AI-driven research and portfolio management tools. Prior to that, he was a Global Macro & Systematic Trading Analyst at Caxton Associates and an Associate in JP Morgan’s Global Proprietary Equities Group.

Naiel holds a BS in Economics from the Wharton School of the University of Pennsylvania, where he was the recipient of the Albert A. Berg Award.

Mark Nevins is a Senior Advisor at SQ Capital, focusing on culture, talent, and organization development.

Mark is the President of Nevins Consulting, a firm that serves clients in senior-level leadership development, executive team alignment, and organizational development. For more than two decades, Mark has been a trusted advisor to CEOs, Managing Partners, and other enterprise leaders. Earlier in his career, he was Global Head of Organization Development & HR at Korn Ferry and Global Head of Organization Development & People Development at Booz Allen.

Mark holds a BA cum laude from The College of the Holy Cross and an MA and PhD from Harvard University.

Eric Wayman is a Director at SQ Capital, focusing on the development and execution of SQ Capital’s data science and AI capability.

Eric was previously Senior Staff Data Scientist at Lightspeed Venture Partners, where he worked from 2019 to 2025. Prior to that, he was a Senior Data Scientist at Salesforce and a Data Scientist II at Pivotal Software.

Eric holds a BS in Mathematics from Rutgers University and a PhD in Mathematics from the University of California, Berkeley.

Steven Castaño is a Vice President at SQ Capital, focusing on the evaluation and execution of investment opportunities.

Before joining SQ Capital, Steven was a Private Equity Associate at Vista Equity Partners, a technology-focused private equity firm. He was previously a Research Associate at Capital Group, one of the world’s largest investment management firms, and an Equity Research Analyst at Credit Suisse.

Steven holds a BA in History from Yale University and an MBA from Harvard Business School.

Ryan Cockburn is a Vice President at SQ Capital, focusing on the evaluation and execution of investment opportunities.

Before joining SQ Capital, Ryan was a Vice President at Reverence Capital Partners, a middle-market private equity firm. He was previously an Investment Banking Analyst at Barclays.

Ryan holds a BS in Business Administration from NYU Stern School of Business.

Teddy O'Hara is a Vice President at SQ Capital, focusing on investor relations and capital formation.

Before joining SQ Capital, Teddy was a Vice President at Third Sphere, a venture capital firm. He was previously an Associate at EQT Partners and, prior to that, an Associate at StepStone Group.

Teddy holds a BA cum laude in Political Science from Colgate University.

Franko Jira is an Associate at SQ Capital, focusing on the evaluation and execution of investment opportunities.

Before joining SQ Capital, Franko was an Investment Banking Analyst at Morgan Stanley. Prior to that, Franko was a Private Equity Research Associate for Professor Josh Lerner at Harvard Business School.

Franko holds a BA in Economics from Harvard University.

Kaitlyn Kang is an Associate at SQ Capital, focusing on the evaluation and execution of investment opportunities.

Before joining SQ Capital, Kaitlyn was a Private Equity Associate at The Carlyle Group. She was previously an Investment Banking Analyst at Morgan Stanley.

Kaitlyn holds a BA in Economics and Architecture from the University of California, Berkeley.

Christina Xu is an Associate at SQ Capital, focusing on the evaluation and execution of investment opportunities.

Before joining SQ Capital, Christina was a Private Equity Associate at Paine Schwartz Partners. She was previously an Investment Banking Analyst at Goldman Sachs.

Christina holds a BA cum laude in Economics from Princeton University.

Max Ryder is the Chief of Staff at SQ Capital, focusing on daily operations and special projects.

Before joining SQ Capital, Max was a Vice President at Bridge Investment Group, a real estate and private equity secondaries firm (through its acquisition of Newbury Partners). He was previously Deputy COO at Indochina Capital.

Max holds a BA magna cum laude in Political Science from the University of Pennsylvania and an MBA from Harvard Business School.