People

Repligen Corp leadership

9 board membersSource: SEC DEF 14A

Snapshot

Repligen Corp's leadership comprises 9 directors and 6 named executive officers, led by Olivier Loeillot (President and Chief Executive Officer, Director). Names, tenure and backgrounds are sourced from the latest SEC proxy statement (DEF 14A).

Board size
9
Source
Proxy statement

Board & leadership

Board of directors
Olivier LoeillotPresident and Chief Executive Officer, DirectorSince 2024

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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Martin D. MadausDirector, Chair of the BoardSince 2023

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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Karen A. DawesDirectorSince 2005

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

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Nicolas M. BarthelemyDirectorSince 2014

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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Carrie Eglinton MannerDirectorSince 2020

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

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Konstantin KonstantinovDirectorSince 2022

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

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Rohin MhatreDirectorSince 2020

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

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Glenn P. MuirDirectorSince 2015

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

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Margaret A. PaxDirectorSince 2024

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

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Executive leadership
Jason K. GarlandChief Financial OfficerSince 2023

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

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James BylundChief Operating OfficerSince 2022

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

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Ralf KuriyelSenior Vice President, Research and DevelopmentSince 2016

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

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Brian DouglassSenior Vice President, Chief Product OfficerSince 2024

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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Violetta HughesChief Accounting OfficerSince 2025

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

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Tony J. HuntExecutive 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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