Global Executive Management

Andreas Müller

b. 1970, German citizen
Business Administration (Dipl.-Betriebswirt FH), from the University of Applied Sciences (HTWG), Constance (Germany)

President of GF Building Flow Solutions (ad interim)

Employed by GF since 1995
 

Career highlights

President, GF Building Flow Solutions (ad interim), 2026-
CEO of Georg Fischer AG, 2019-
Chairman of the Board of Directors of Uponor Corporation (Finland) (until October 2024)
CFO of Georg Fischer AG, 2017–2019
CFO of GF Casting Solutions, 2008–2016
Head of Controlling Business Unit Industry & Utility of GF Piping Systems, Schaffhausen, 2002–2008
Head of Operations for GF Piping Systems companies in Australia, 2000–2002
Head of Controlling of GF Piping Systems, Schaffhausen, 1998–2000

Nadine Gruber

b. 1988, German citizen, M.A. (General Management)

Chief Financial Officer

Employed by GF since 2014
Member of the GEM since 1 May 2025

Career highlights

Chief Financial Officer, GF Building Flow Solutions, 2025-
Head Investor Relations / Chief Risk Officer, Georg Fischer AG, 2023-2025
Head of Controlling BU Industry/ Utility, Georg Fischer Piping Systems LLC, 2019-2023
Head of Division Controlling, Georg Fischer Piping Systems LLC, 2016-2019
Division Controller, Georg Fischer Piping Systems LLC, 2014-2016
Controller Category Management, Heinrich Heine GmbH, 2012-2014

Benjamin Bronke

b. 1978, German citizen

Head of Global Human Resources

Employed by GF since 2005
Member of the GEM since 1 September 2025

Career highlights

Head of Global Human Resources, GF Building Flow Solutions, 2025-
Head of Compensation & Benefits, GF Industry and Infrastructure Flow Solutions, 2019-2025
Head of HR Switzerland, GF Industry and Infrastructure Flow Solutions, 2018-2019
HR Business Partner Senior Management, Georg Fischer AG, 2016-2018
Various managerial positions in HR, Georg Fischer AG, 2005-2016

Sebastian Erbe

b. 1987, German citizen

Chief Operations Officer

Employed by GF since 2023
Member of the GEM since 1 May 2026

Career highlights

Chief Operations Officer, GF Building Flow Solutions, 2026-
Regional Head of Manufacturing EMEA, GF Industry & Infrastructure Flow Solutions, 2024-2026
Head of Global Operational Excellence, GF Industry & Infrastructure Flow Solutions, 2023-2024
Vice President Operations, Heraeus Medevio, 2020-2022
Senior Supply Chain and Operational Excellence Manager, Heraeus, 2018-2020
Various managerial positions at Hensoldt and Airbus, 2010-2017
 

Olli Haavisto

b. 1990, Finnish citizen, M.Sc. (Econ.)

Head of Strategy

Head of Product Portfolio Management (ad interim)

Employed by GF since 2016
Member of the GEM since 1 May 2025

Career highlights

Head of Strategy, GF Building Flow Solutions, 2025-
Vice President, Business Controlling EMEA, GF Building Flow Solutions, 2023-2025
Vice President, Business Transformation, Uponor Corporation, 2023
Director, Program Office, Uponor Corporation, 2021-2023
Director, Financial Planning & Analysis, Uponor North America, 2019-2021
Senior Manager, Financial Planning & Analysis, Uponor North America, 2018-2019
Controller, Uponor Corporation, 2016-2018
Controlling and accounting positions, KONE Corporation, 2014-2016

Reetta Härkki

b. 1965, Finnish citizen, Master of Laws, trained by the bench

Head of Legal Building Flow Solutions, Deputy Group General Counsel

Employed by GF since 2008
Member of the GEM since 1 July 2022

Career highlights

Senior Vice President and Chief Legal Officer, Uponor Corporation, July 2022–
General Counsel, Uponor Corporation, January 2008–June 2022
Senior Legal Counsel, Nokia Corporation, April 2001–January 2008
General Counsel, Sonera Zed Ltd, February 2000–April 2001
Assistant General Counsel, Sonera Corporation, April 1996–January 2000
Attorney, Bützow & Co Ltd Attorneys-at-Law, June 1989–April 1996

Gerrit Schmidt

b. 1981, German citizen

Head of Commercial Europe

Employed by GF since 2021
Member of the GEM since April 2026

Career highlights

Head of Commercial Europe, GF Building Flow Solutions, 2026-
Vice President Central Europe, GF Building Flow Solutions, 2024-2026
Interim Senior Vice President – Building Solutions Europe, Uponor, 2023-2024
Vice President Sales & Marketing – Building Solutions Central & South Europe, Uponor, 2022-2023
Vice President Sales & Marketing – Building Solutions Central Europe, Uponor, 2021-2022
Various managerial positions at P3, Roland Berger Strategy Consultants and Hilti, 2010-2021
 

John Reutter

b. 1971, United States citizen, B. Sc. (Acct.), MBA

President of GF Building Flow Solutions Americas

Employed by GF since 2018
Member of the GEM since 9 October 2024

Career highlights

President, Building Solutions – North America, Uponor, Inc., October 2024–
Vice President, Finance, North America, Uponor, Inc., 2018–2024
Vice President, Finance, Global Healthcare Division, Ecolab Inc., 2015–2018
Vice President, Finance, North America Food & Beverage Division, Ecolab Inc., 2012–2015
Controller, North America Water, Energe, & Waste Division, Ecolab Inc., 2010–2012
Corporate Finance / Divisional Managerial Roles, Ecolab Inc., 2004–2010
Manager, Strategy and Operations Practice, Deloitte Consulting, 2001–2004

César Sayegh

b. 1991, French citizen, Master in Management, HEC Paris

General Manager of GF MENAT

Employed by GF since 2019
Member of the GEM May 2024 – April 2025, since 1 September 2025

Career highlights

General Manager MENAT, GF Building Flow Solutions, 2025-
Head of Strategic Transformation, Georg Fischer AG, 2025
Head of Strategy Execution, GF Building Flow Solutions, 2024-2025
Head of Integration, Georg Fischer AG, 2023
Head of Corporate M&A, Georg Fischer AG, 2021-2023
Other managerial positions in Strategy, Georg Fischer AG, 2019-2021
Various managerial positions in Consulting, McKinsey & Company, 2014-2019