Firm History

Over a Decade of Partnership

LEADERSHIP

Andrew Feldstein
Co-Founder, Chief Investment Officer, Partner

Andrew Feldstein is BlueMountain’s Co-Founder and Chief Investment Officer. Mr. Feldstein is the Chair of the Firm’s Management and Investment Committees and a member of the Risk Committee. Prior to co-founding BlueMountain in 2003, Mr. Feldstein spent over a decade at J.P. Morgan where he was a Managing Director and served as Head of Structured Credit; Head of High Yield Sales, Trading and Research; and Head of Global Credit Portfolio. Mr. Feldstein is a member of the board of directors of PNC Financial Services Group Inc. He is also a Trustee of Third Way, a public policy think tank; a Trustee of the Santa Fe Institute, an independent research and education center; and a member of the Harvard Law School Leadership Council. Mr. Feldstein earned a J.D. from Harvard Law School and a B.A. from Georgetown University.

Stephen Siderow
Co-Founder, Co-President, Partner

Stephen Siderow is BlueMountain’s Co-Founder and Co-President. Mr. Siderow oversees the Firm’s business development and strategic initiatives and he is a member of the Firm’s Management, Compliance, and Risk Committees. Prior to co-founding BlueMountain in 2003, Mr. Siderow was a Senior Consultant with McKinsey & Company, where he focused on the financial services industry, serving senior management executives and CEOs on business strategy, organization and operations issues. Prior to McKinsey, Mr. Siderow was a corporate attorney with Cleary Gottlieb. Mr. Siderow serves as Vice Chair of the Board of Directors of the Birthright Israel Foundation, a program that provides the gift of first-time peer education trips to Israel for young Jewish adults. He also serves on the Board of Directors of Ars Nova, which provides training and development programs to young performing artists, and is a member of the Advisory Board of the Hertzberg Palliative Care Institute at Mt. Sinai Hospital, whose mission is to advance the field of palliative medicine through clinical, educational and research initiatives. Mr. Siderow earned a J.D., cum laude, from Harvard Law School, and a B.A., magna cum laude, in Philosophy, from Amherst College. Mr. Siderow was also a Fulbright and a Sheldon Scholar in Israel.

Michael Liberman
Co-President, COO, Partner

Michael Liberman is BlueMountain’s Co-President and Chief Operating Officer. He has led the development of the Firm’s Technology, Quant and Operational platforms and now oversees a number of BlueMountain’s business areas. Mr. Liberman is the Chairperson of the Firm’s Valuation Committee, and a member of the Management and Risk Committees. From 2012 through 2015 he was recognized by the Institutional Investor’s Trading Technology 40, an annual ranking of the field’s top innovators and visionaries. Prior to joining BlueMountain in 2004, he was a Managing Director and Head of Global Interest Rate Strats at Goldman Sachs, where he was responsible for the quantitative strategies and systems for trading and risk management. Prior to Goldman, Mr. Liberman was at J.P. Morgan where he was most recently Head of Global Rates Derivatives Technology, and was a lead developer of derivatives risk management systems. Earlier in his career, Mr. Liberman developed database and telecommunication software in Silicon Valley. Mr. Liberman holds a B.A. with the highest honors in Mathematics and an M.A. in Mathematics from Brandeis University. Mr. Liberman also continued his graduate studies in Mathematics at the University of California, Berkeley.

Scott Beardsley
Head of Treasury & Operations, Partner

Scott Beardsley is BlueMountain’s Head of Treasury & Operations, responsible for the Firm’s Liquidity Management, Portfolio Finance, PnL, Valuations and Trade Support teams. Mr. Beardsley joined BlueMountain at inception in 2003. Mr. Beardsley is a member of the Firm’s Valuation, Risk & Compliance Committees and chairs the Trade Oversight Committee. Externally, Mr. Beardsley is the firm representative on ISDA’s Credit Steering Committee and is a member of MFA’s Derivatives & Swaps Committee. Previously, he was a Senior Associate in the Business Architecture group at Paloma Partners. Mr. Beardsley also worked for several years as an Associate Manager at GlobeOp Financial Services, the fund administration service provider. He earned an M.B.A. with Honors from Clarkson University and a B.S. in Finance and Economics from Castleton State College.

Brandon Cahill
Portfolio Manager; Head of Structured and Technical Credit, Partner

Brandon Cahill is BlueMountain’s Head of Structured and Technical Credit, where he co-heads the CLO business and is responsible for the firm’s mortgage, synthetic CDO and technical credit strategies. Mr. Cahill also sits on BlueMountain’s Investment and Valuation Committees. In addition, Mr. Cahill acts as the Co-CEO of BlueMountain Fuji, a CLO management platform where he focuses on capital markets and structuring. Prior to joining BlueMountain in 2004, Mr. Cahill was an analyst in Citigroup’s Global Project and Structured Trade Finance group. He attend the University of Notre Dame, where he graduated magna cum laude, earning a Bachelor’s in Economics and Mathematics.

Laura Cappiello
Head of Human Capital Management & Deputy General Counsel

Laura Cappiello is BlueMountain’s Head of Human Capital Management & Deputy General Counsel, responsible for overseeing the Firm’s talent management, personnel, and communications, and is a member of the Firm’s Management and Compliance Committees. Previously Ms. Cappiello spent four years as the Director of Human Resources & Communications at Chilton Investment Company. Prior to Chilton, she was Senior Manager of Legal Recruiting with Sullivan & Cromwell and a Litigation Associate with Willkie Farr & Gallagher. Ms. Cappiello serves on the board of the non-profit organization, Behind the Book. She earned a J.D. from Harvard Law School, and a B.A. in English & Politics, summa cum laude, from New York University, where she was elected to Phi Beta Kappa.

Sarah Dahan
Portfolio Manager; Head of Global Volatility, Partner

Sarah Dahan is BlueMountain’s Head of Global Volatility. Prior to joining the Firm in 2008, Ms. Dahan was at J.P. Morgan in interest rate proprietary trading, trading agency mortgages and options on mortgages. Ms. Dahan attended Columbia University, where she received an M.S.c. in Financial Engineering. She also holds a Bachelor’s degree in Engineering from Ecole Centrale in Paris, France.

Lee Kempler
Chief Operating Officer for Investments

Lee Kempler is the Chief Operating Officer for Investments at BlueMountain. He is responsible for managing and improving the processes associated with information flow among Portfolio Managers, the CRO, and CIO; decision-making on large capital commitments through the Investment Committee; and capital allocation within BlueMountain funds. Mr. Kempler also supports the CIO on strategy and planning initiatives. Prior to joining the firm, Mr. Kempler was a Managing Director at BlackRock, where he was the founding Executive Director of the BlackRock Investment Institute, a platform for collaboration among portfolio managers and communication of investment insight to clients. Prior to BlackRock, Mr. Kempler spent nearly 25 years at McKinsey & Company, where he served clients in financial services and became the Firm’s first Director of Knowledge, with responsibility for capturing, codifying, and disseminating the firm’s intellectual property. Mr. Kempler holds BA, BS, and MBA degrees from the University of Pennsylvania and an MA from Johns Hopkins School of Advanced International Studies (SAIS). He serves on the Board of Advisors of SAIS and is a member of the Council on Foreign Relations.

Charles Kobayashi
Portfolio Manager; Loan & CLO Management, Partner

Charles Kobayashi is a Portfolio Manager responsible for BlueMountain’s CLO investments, and is a member of the Firm’s Risk Committee. Prior to joining BlueMountain, Mr. Kobayashi was a Senior Portfolio Manager at Indosuez Capital with responsibility for managing $2.0 billion in leverage loan, CDO, and high yield assets. Before joining Indosuez Capital in 2001, Mr. Kobayashi managed $1.5 billion in proprietary capital of high yield bonds, leverage loans, structured notes, CDO, and distressed assets as Senior Vice President and Portfolio Manager at ORIX USA Corp. He also worked at Bank of Tokyo Trust where he was involved in mergers and acquisitions and restructuring. Mr. Kobayashi earned an M.B.A. in Finance from New York University and a B.S. in Biochemistry/Molecular Biology from the University of Wisconsin-Madison.

Michael Mauboussin
Director of Research

Michael Mauboussin is the Director of Research at BlueMountain Capital. Prior to joining BlueMountain, Mr. Mauboussin had been Head of Global Financial Strategies at Credit Suisse since 2013, where earlier in his career he had been an analyst and, subsequently, Chief U.S. Investment Strategist. From 2004 to 2013, he was Chief Investment Strategist at Legg Mason Capital Management. He is also a former president of the Consumer Analyst Group of New York and was named to the Institutional Investor All-America Research Team and The Wall Street Journal All-Star survey on multiple occasions. Mr. Mauboussin has been an adjunct professor of finance at Columbia Business School since 1993, and is on the faculty of the Heilbrunn Center for Graham and Dodd Investing. He is also chairman of the board of trustees of the Santa Fe Institute, a leading center for multi-disciplinary research in complex systems theory

James Pieri
Head of Private Healthcare, Partner

Jim Pieri leads BlueMountain’s dedicated Healthcare Investing strategy. Mr. Pieri is a Partner and serves on the Firm’s Investment Committee. Since joining BlueMountain in 2012, Mr. Pieri has built and managed a portfolio of private investments across the capital structure in healthcare, financial services, and real asset related markets. Prior to joining BlueMountain, Mr. Pieri headed Principal Finance & Structuring businesses at J.P. Morgan and Deutsche Bank. Mr. Pieri has served on the boards of several of BlueMountain’s healthcare investments, including National Partners in Health, Verity Health System, Regency Integrated Health Services, MedEquities Realty Trust, Capital Senior Care Ventures, Kindred Carve-Out JV, and GoldenLiving Carve-Out JV. Mr. Pieri holds a B.S. in Applied Economics and Business Management from Cornell University and a M.P.A. with a concentration in Economic Policy & Management from the School of International & Public Affairs at Columbia University.

Dava Ritchea
Chief Financial Officer, Partner

Dava Ritchea is BlueMountain’s Chief Financial Officer, responsible for the Firm’s Fund Accounting, Management Company Accounting, Tax and Corporate Finance teams. Ms. Ritchea is a member of the Firm’s Management and Valuation Committees. Prior to joining BlueMountain in 2013, Ms. Ritchea was a Vice President in the Hedge Fund Advisory Group at Credit Suisse. Ms. Ritchea also worked for several years at Lehman Brothers and Barclays Capital in roles in Corporate Strategy and Investment Banking. She earned her B.S in Finance with a minor in Mathematics from Carnegie Mellon University.

Brad Schwartz
Portfolio Manager; Head of Asset-Based Investing

Brad Schwartz is a Portfolio Manager responsible for BlueMountain’s investments in specialty finance companies, consumer-related asset-backed securities, and whole-asset investments. He joined the Firm in 2008 from J.P. Morgan, where he held a number of senior level positions over a twenty-year career. His responsibilities included originating, structuring, and risk-managing transactions across all asset classes. In 2005, Brad started the ABS Principal Investment Management group at J.P. Morgan. Mr. Schwartz graduated from Dickinson College with a Bachelor’s degree in Economics and received an M.B.A. in Finance and Accounting from Cornell University.

Scott Troeller
Portfolio Manager; Head of Private Infrastructure

Scott Troeller is a Portfolio Manager, responsible for BlueMountain’s Private Infrastructure strategy. Prior to joining BlueMountain, Scott was a Managing Director at Fir Tree Partners, where he led private investment activities in infrastructure businesses such as renewable energy and telecommunication. Prior to Fir Tree, Scott was a General Partner at Veronis Suhler Stevenson, a mid-market buyout fund, where he co-managed a private equity and structured equity business across five funds in excess of $3 billion. Scott began his career as an investment banker at JP Morgan and holds a BA from Rutgers University in both Economics and Communications with concentrations in Mathematics and Physics.

Jon Weber
Head of Portfolio Company Management

Jon Weber is the Head of Portfolio Company Management, and serves on the Firm’s Investment Committee. Mr. Weber works with management and boards of companies where the firm is an influential investor. Prior to joining BlueMountain, Mr. Weber headed groups at Anchorage Capital Group, Goldman Sachs Special Situations Group and Icahn Enterprises, where he was responsible for operational oversight, governance and value enhancement of portfolio companies. In those capacities, he has served as a board member, senior executive, and board-level advisor for companies in a broad range of industries over 15 years. Roles included President of Icahn Enterprises, L.P. (NYSE-IEP), CEO of Philip Services Corporation and Viskase Companies, and board member of American Railcar Industries, Bavaria Yachtbau, Crescent Communities, Martinrea Honsel, National Energy Group, WestPoint International, WIND Hellas, Xenith Bankshares and XO Communications. Previously, Mr. Weber was an investment banker at JPMorgan Chase & Co. and Morgan Stanley, and an attorney with Weil, Gotshal & Manges. He is a Life Member of the Council on Foreign Relations. Mr. Weber earned a J.D., cum laude, from Harvard Law School, and B.S. and M.B.A., magna cum laude, from Babson College.

Amy Wierenga
Chief Risk Officer, Partner

Amy Wierenga is BlueMountain’s Chief Risk Officer and is responsible for the Risk and Portfolio Construction team. Ms. Wierenga is also Chair of the Risk Committee and a member of the Firm’s Valuation Committee. She joined BlueMountain in 2008 from Merrill Lynch, where she was responsible for market risk in the Global Rates and FX trading businesses. Prior to Merrill Lynch, Ms. Wierenga worked as a commissioned Bank Examiner and Market and Liquidity Risk Specialist for the Federal Reserve Bank. Ms. Wierenga received the Federal Reserve’s C.M.L. Bishop Award for Excellence and Outstanding Achievement in 2004. Ms. Wierenga earned an M.B.A in Analytic Finance, Econometrics and Statistics from the University of Chicago, Booth School of Business. She graduated with high honors from Butler University with Bachelor’s degrees in Economics and Music.

Alan Gerstein
Senior Advisor

Mr. Gerstein was a Senior Portfolio Manager and Partner at BlueMountain from 2004 – 2016, and currently serves as a Senior Advisor, as a member of the Firm’s Valuation Committee, and as a Director of several BlueMountain hedge funds. During Mr. Gerstein’s active tenure he oversaw the Volatility and Fixed Income Arbitrage Strategies, Risk, and was based in our London office for a time as CEO of BlueMountain Europe. Prior to joining BlueMountain, Mr. Gerstein was a Vice President and Head of U.S. Investment Grade Credit Derivatives Trading at Goldman Sachs. Over a 10 year career at Goldman, Mr. Gerstein held several other senior positions including Head of U.S. Agency Bond Trading and in Interest Rate Derivatives Marketing. Prior to that, Mr. Gerstein was a Vice President of Interest Rate Derivatives Marketing at J.P. Morgan. Mr. Gerstein is a member of the MIT Corporation Development Committee and the Board of Trustees at Blythedale Children’s Hospital in Valhalla, NY. He earned an M.B.A. from the MIT Sloan School of Management and a B.S. in Economics from the Massachusetts Institute of Technology.

Paul Friedman
Senior Advisor

Paul Friedman is BlueMountain’s General Counsel and Chief Administrative Officer, and previously served as the Firm’s Chief Financial Officer. Mr. Friedman is the Chair of the Firm’s Compliance Committee, and a member of the Firm’s Management, Valuation, and Investment Committees. Prior to joining BlueMountain in 2010, Mr. Friedman spent over 10 years as an attorney with Morrison & Foerster in San Francisco and Kenneth Cole Productions in New York. Mr. Friedman earned a J.D., cum laude, from Harvard Law School and a B.A. in Economics and Public Policy, summa cum laude, from Duke University, where he was elected to Phi Beta Kappa.


  • Andrew Feldstein
    Co-Founder, Chief Investment Officer
  • Stephen Siderow
    Co-Founder, Co-President
  • Michael Liberman
    Co-President, COO
  • Scott Beardsley
    Head of Treasury and Operations
  • Brandon Cahill
    Portfolio Manager; Head of Structured and Technical Credit
  • Laura Cappiello
    Head of Human Capital Management & Deputy General Counsel
  • Sarah Dahan
    Portfolio Manager; Head of Global Volatility
  • Lee Kempler
    Chief Operating Officer for Investments
  • Charles Kobayashi
    Portfolio Manager; Loan & CLO Management
  • Michael Mauboussin
    Director of Research
  • James Pieri
    Head of Private Healthcare
  • Dava Ritchea
    Chief Financial Officer
  • Brad Schwartz
    Portfolio Manager; Head of Asset-Based Investing
  • Scott Troeller
    Portfolio Manager; Head of Private Infrastructure
  • Jon Weber
    Head of Portfolio Company Management
  • Amy Wierenga
    Chief Risk Officer
  • Alan Gerstein
    Senior Advisor
  • Paul Friedman
    Senior Advisor

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