Empowering global VCs and founders to scale in the US

Based in New York City, The Madison Group delivers a critical U.S. presence for global VCs and their portfolio companies aiming to commercialize in the American market. Founded out of Columbia Business School, The Madison Group distinguishes itself by combining deep financial expertise with hands-on, entrepreneurial and founder experience.

Our team brings over a century of combined knowledge in go-to-market strategy, financial advisory, consulting and startup execution. Backed by an exclusive business network spanning top-tier investors, operators, and corporate partners, we help early-stage startups localize operations, access capital, and accelerate scalable growth in the world’s most competitive market.

End-to-End Advisory.

  • Go-to-market strategy and sales execution

    Craft tailored U.S. market entry plans, build sales pipelines, and execute customer acquisition strategies.

  • Fundraising support and investor readiness

    Prepare financials, pitch materials, and data rooms to help you raise capital from top-tier U.S. investors.

  • U.S. legal and entity setup

    Navigate incorporation, regulatory requirements, and legal structuring with trusted partners and advisors.

  • Financial planning, reporting, and operations

    Build robust financial infrastructure, including forecasting, KPIs, accounting systems, and board reporting.

  • Talent hiring, compensation, and HR setup

    Support recruitment, set up compliant payroll and benefits, and design incentive plans for U.S.-based teams.

Expertise in every domain.

  • Michael Domb

    Co-Founder & Managing Partner

  • Andy Hamer

    Co-Founder & Managing Partner

  • Naoto Kojima

    VP, APAC and M&A

  • Prof. Mattan Griffel

    Principal Advisor

  • Prof. Oded Netzer

    Principal Advisor

  • Dr. Jorge Guzman

    Principal Advisor

  • Co-founder & Managing Partner

    Michael brings over a decade of experience in technology, finance, and business strategy. He began his career in venture capital in 2013, specializing in SaaS and FinTech early-stage companies, and supported the establishment of the Waterloo Innovation Network (WIN) incubator. He then founded Forest Hill Capital, an investment fund focused on acquiring and developing multifamily real estate in Canada.

    Beyond his entrepreneurial ventures, Michael has held senior financial and strategic advisory roles at Check Point (NASDAQ: CHKP), one of the world’s largest cybersecurity companies. There, he was influential in shaping the company’s $3B global go-to-market strategy and spearheading initiatives to drive revenue growth to $5B.

    Michael holds a B.A. from the Hebrew University, has completed coursework at Harvard, and is currently pursuing an MBA at Columbia. He resides in New York City.

  • Co-founder & Managing Partner

    Andy brings over 15 years of experience across investment banking, public and private investing, and early-stage advisory. He began his career as a sell-side equity analyst in Frankfurt and New York, advising institutional clients on IPOs and capital raises. Today, he manages a public equities fund focused on long-term growth and actively invests in private markets.

    As an advisor to early-stage teams, Andy partners with founders to build scalable financial operations and lead capital strategy and fundraising. His expertise includes budgeting and forecasting, financial modeling, M&A execution, KPI and unit economics design, investor communication, and board-level engagement. Andy is particularly experienced in helping international startups expand into the U.S. market, navigate investor expectations, and establish the financial foundations needed for sustainable growth.

    He holds a B.B.A. from Frankfurt School of Finance & Management and an MBA from Columbia. Andy is based in New York City.

  • VP, APAC & M&A

    Naoto brings nearly a decade of experience in investment banking, cross-border M&A, and startup advisory across Japan and the United States. He began his career at Nomura Securities (NYSE: NMR) in Tokyo, where he advised clients in the consumer and retail sectors on IPOs, M&A, capital raising, and corporate restructuring. He later relocated to New York, where he led business development in the healthcare and startup sectors, specializing in advising venture-backed startups and biotech VCs.

    Throughout his career, Naoto has led numerous cross-border transactions between North America and Asia and has built extensive startup and VC networks in both Japan and the United States.


    He holds a B.A. in Economics from Kyoto University and is currently pursuing his MBA at Columbia. He resides in New York City.

  • Principal Advisor

    Professor Oded Netzer is a Vice Dean at Columbia Business School and a world-renowned expert in data-driven decision making, customer analytics, and quantitative marketing strategy. His research focuses on building statistical and econometric models to understand consumer behavior and guide business decisions—ranging from dynamic customer segmentation to the use of unstructured data for strategic insights. Most notably, he has developed a framework for managing firms' customer bases through dynamic segmentation.

    Oded is the author of Decisions Over Decimals and has published extensively in top academic journals. His work has earned multiple awards, including the ISMS Long-term Contribution Award, the John Little Best Paper Award, the Frank Bass Outstanding Dissertation Award, the Society for Consumer Psychology (SCP) Best Paper Award, and the George S. Eccles Research Fund Award.

    Oded is a contributing scholar at Amazon and consults widely for startups and Fortune 500 companies. He is based in New York City.

  • Principal Advisor

    Professor Mattan Griffel is a serial entrepreneur and two-time Y- Combinator-backed founder, having raised over $75 million in equity financing across his ventures. He was named to Forbes 30 Under 30 and is the co-author of Python for MBAs.

    In addition to his entrepreneurial work, Mattan is an award-winning faculty member at Columbia Business School and an Innovation Fellow at the Lang Center for Entrepreneurship, where he teaches courses on product strategy, technical fluency, and entrepreneurship.
    As an advisor and investor, Mattan supports early-stage founders and executives on growth, product development, and scaling operations. He has consulted for companies including Goldman Sachs, Bloomberg, Condé Nast, and American Express, and his work has been featured in the New York Times, Wall Street Journal, Forbes, BusinessWeek, and MIT Technology Review.

    Mattan is based in New York City.

    More on Mattan at: https://www.mattangriffel.com/

  • Dr. Jorge Guzman is an associate professor at the Management Division in Columbia Business School. Jorge received his Ph.D from the Sloan School of Management at the Massachusettts Institute of Technology (MIT), and was previously a postdoc at the National Bureau of Economic Research (NBER) and a lecturer at the MIT Sloan School of Management. His research focuses on entrepreneurship policy, regional entrepreneurship, and entrepreneurial strategy. He was previously involved in the Boston startup ecosystem, and has been an advisor to numerous startups, and to regional and national policy agencies on the design of entrepreneurship ecosystems.

    Jorge is based in New York City.

    More on Jorge at: https://www.jorgeguzman.co/

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