Board & Leadership

Board of directors

Olivier Loeillot President and Chief Executive Officer, Director

President and CEO of Repligen; joined October 2023 as President and Chief Commercial Officer; former CEO of Ascensus Specialties and Bioprocess President at Cytiva.

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Since 2024
Martin D. Madaus Director, Chair of the Board

Chair of the Repligen Board since March 2026; senior operating executive at The Carlyle Group; former Chairman, President and CEO of Millipore.

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Since 2023
Karen A. Dawes Director

President of Knowledgeable Decisions, LLC; former Lead Independent Director of Repligen; former SVP at Bayer and Wyeth.

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Since 2005

Senior Advisor at Warburg Pincus since 2020; former President and CEO of bioTheranostics; former President, Global Commercial Operations at Life Technologies.

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Since 2014

President and CEO of OraSure Technologies since 2022; former SVP at Quest Diagnostics; two decades at GE Healthcare.

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Since 2020

Chief Technology Officer at Ring Therapeutics and Operating Partner at Flagship Pioneering; former CTO at Codiak BioSciences.

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Since 2022
Rohin Mhatre Director

Executive Vice President and Chief Technical Operations Officer at Parabilis Medicines (formerly FogPharma); 27 years at Biogen.

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Since 2020
Glenn P. Muir Director

Retired CFO and Executive Vice President of Hologic, Inc.; 26 years with Hologic.

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Since 2015
Margaret A. Pax Director

Former Vice President, Strategy and Innovation at Thermo Fisher Scientific; over 30 years in life sciences growth strategy.

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Since 2024

Executive leadership

Jason K. Garland Chief Financial Officer

CFO of Repligen since September 2023; former EVP and CFO of Integer Holdings; ~20 years at General Electric.

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Since 2023
James Bylund Chief Operating Officer

COO of Repligen since January 2022; joined March 2020 as SVP, Global Operations and IT; ten years at Thermo Fisher.

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Since 2022
Ralf Kuriyel Senior Vice President, Research and Development

SVP, R&D at Repligen since October 2016; former VP at Pall Corporation's Life Sciences single-use business unit.

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Since 2016
Brian Douglass Senior Vice President, Chief Product Officer

SVP and Chief Product Officer of Repligen since December 2025; joined May 2024 as SVP, Filtration and Chromatography; former VP/GM at Thermo Fisher.

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Since 2024
Violetta Hughes Chief Accounting Officer

Chief Accounting Officer and principal accounting officer of Repligen, effective September 1, 2025; former Chief Accounting Officer at Azenta.

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Since 2025
Tony J. Hunt Executive Chair of the Board

Departing Executive Chair of the Board; former Chief Executive Officer of Repligen; retired from the Board effective March 13, 2026.

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