Global Leadership Team

Michael Rauterkus

b. 1966, German citizen, M.Sc. (BA)

President of GF Building Flow Solutions

Employed by Uponor since 2021
Member of the GLT since 21 August 2021

Key positions of trust

Chairman of the Advisory Board, SLV GmbH, 2017–

Career highlights

President and CEO, Uponor Corporation, August 2021–
CEO, Grohe AG, 2015–2019
Several managerial positions at the Grohe Group, 2006–2015 
General Manager Northern Continental Europe, Hasbro, Inc., 2004–2006 
Several managerial positions, Levi Strauss & Co., 1997–2004  
Managerial positions in sales, Kraft Jacobs Suchard (now Mondelez), 1990–1997

Jonas Brennwald

b. 1968, Swedish and Swiss citizen, B.Sc. (Mktg.)

President of GF Building Flow Solutions Europe

Employed by Uponor since 2024
Member of the GLT since 1 January 2024

Career highlights

President, Building Solutions – Europe, Uponor GmbH, January 2024–
Co-CEO, Grohe AG, 2019–2023
CEO, Lixil EMENA, 2019–2023
Various sales executive and regional management positions, Grohe AG, 2012–2019
General Manager International, Doorman Products Europe, 2008–2012
Sales Director for Nordisc, Baltics and Iceland, Goodyear Tire and Rubber Company, 2005–2007
Country Division Manager for Sweden, ECOLAB, 2002–2005
Various international sales executive positions, MARS, 1991–2002

John Reutter

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

President of GF Building Flow Solutions Americas

Employed by Uponor since 2018
Member of the GLT 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

Thomas Fuhr

b. 1965, German citizen, M.Sc. (Mech. Eng.)

Chief Technology Officer

Employed by Uponor since 2022
Member of the GLT since 1 October 2022

Career highlights

Chief Technology Officer, Uponor GmbH, October 2022–
Co-CEO, Grohe AG, 2019–2022
Chief Operating Officer and Deputy CEO, Grohe AG, 2016–2019
Chief Operating Officer, Grohe AG, 2013–2015
Several managerial positions in Development, Manufacturing, Quality, Logistics and Purchasing at Mercedes-Benz, 1989–2013

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 Uponor since 2008
Member of the GLT 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

Nadine Gruber

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

Chief Financial Officer

Employed by GF since 2014
Member of the GLT 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

Olli Haavisto

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

Head of Strategy

Employed by GF / Uponor since 2016
Member of the GLT 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

Torsten Meier

b. 1973, German citizen, M.Sc. (Mech. Eng.)

Chief Innovation Officer (& Head of Category ad interim)

Employed by GF / Uponor since 2023
Member of the GLT since 1 May 2025

Career highlights

Chief Innovation Officer, Uponor Corporation / GF Building Flow Solutions, 2023-
Leader Research and Development Fittings, Lixil International, 2020-2023
Executive Vice President Research and Development, Deputy COO, Grohe AG, 2020-2023
Vice President Research and Development, Grohe AG, 2013-2020
Various managerial positions in Engineering and Development, Mercedes-Benz, 1994-2013

Benjamin Bronke

b. 1978, German citizen

Head of Global Human Resources

Employed by GF since 2005
Member of the GLT 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

César Sayegh

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

General Manager of GF MENAT

Employed by GF since 2019
Member of the GLT 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

Christopher Merrell

b. 1978, British citizen, BA Hons Marketing

Chief Marketing Officer

Employed by GF since 2019
Member of the GLT since 1 September 2025

Career highlights

Chief Marketing Officer, Georg Fischer AG, 2025-
Head of Global Marketing & Communications, GF Industry and Infrastructure Flow Solutions, 2019-2025
Marketing Director, ABB Power Grids, 2013-2019
Head of EMEA Marketing & Communications, Garmin International, 2007-2013
Marketing Manager, Condor Ferries, 2000-2007