Management Team
Management team
Chief Executive Officer (CEO)
Steady Energy’s CEO is appointed by the Board of Directors. The CEO manages and develops Steady Energy’s business and is in charge of the operative administration of the company in accordance with the instructions of the Board of Directors. The CEO presents matters and reports them to the Board of Directors. The CEO carries out the day-to-day administration in accordance with the instructions of the Board of Directors and ensures that Steady Energy’s accounting complies with law and that the management of Steady Energy’s assets is organised in a reliable manner.
Tommi Nyman has acted as Steady Energy’s CEO since 2023.
Management team
Steady Energy’s Management team consists of the CEO and other members appointed by the CEO.
Management Team members
Tommi Nyman
CEO
CEO, co-founder and Management team member since 2023
Born 1970, male
M. Sc. in Mechanical Engineering
Background add
Work history:
Vice President, Nuclear Energy at VTT Technical Research Centre of Finland in 2020–2023
Several senior management positions at Teollisuuden Voima (TVO) in 2006–2020, including Head of Business Operations, Engineering Department, Head of Project Management, Senior Manager, Project Control, and Group Manager for the Olkiluoto 3 project
Member of the technical committee at Posiva Oyj in 2017–2019
Project Manager for the ATLAS experiment at CERN in Switzerland 2000–2006 and as Project Engineer for the CMS experiment 1994–1998
Project Engineer at Schlumberger in Norway 1998–2000
Positions of trust:
Chair of Steady Energy’s Board of Directors in 2025–2026
Sami Airola
CFO
Chief Financial Officer and Management team member since 2026
Born 1975, male
M. Sc. in Economics and Business Administration
Background add
Work history:
Chief Executive Officer and founder at Airnova Oy since 2025
CFO and a member of the management team at Myrsky Energia in 2022–2025
Head of Finance and a member of the management and CFO Teams at VR FleetCare in 2019–2022
CFO/Division Controller at Empower Power Networks in 2014–2019
Business Controller positions at Empower in 2008–2014
Controller and Market Analyst roles at Fortum Markets in 2004–2008
Finance and project management roles at V&S Finland and Talentum in 2001–2004
Positions of trust:
- Member of the Board of several SPVs in 2022–2025
Hannes Haapalahti
Chief Technology Officer
Chief Technology Officer, co-founder and Management team member since 2023
Born 1987, male
M. Sc. in Nuclear Engineering
Background add
Work history:
Managing Director of St1 Lähienergia and Director, Heat From the Ground at St1 in 2022–2023 and Risk Manager at St1 in 2020–2022
Business Unit Manager, Nuclear Projects at Platom in 2019–2020
Several project management and engineering positions at Teollisuuden Voima (TVO) in 2014–2019, including Project Manager, Commissioning Engineer and Project Engineer
Petteri Tenhunen
Chief Legal Officer
Chief Legal Officer, co-founder and Management team member since 2023
Born 1979, male
Master of Laws
Background add
Work history:
Co-Founder and Chair of the Board of Suomen Tunnistetieto Oy
Partner at Smartius Oy since 2014 (currently non-practicing)
Head of Legal Affairs (OL1, OL2 and OL4) for Teollisuuden Voima Oyj (TVO) and Posiva Oy 2012–2018
Legal Counsel at Fondia in 2010–2011
Legal Counsel at Ernst & Young in 2006–2010
Associate Lawyer at Roschier, Attorneys Ltd in 2005–2006
Positions of trust:
Chair or Member of the Board of Smartius Oy in 2018–2023
Chair of the Board of Suomen Tunnistetieto 2017–2024
Board member of several growth companies
Matti Pentti
Chief Commercial Officer
Chief Commercial Officer and Management team member since 2023
Born 1963, male
Marine Engineer
Background add
Work history:
Chief Executive Officer of Myrsky Energia in 2022–2022
Entrepreneur and senior consultant since 2023
Several senior leadership positions at St1, including Director of the Heat from the Ground Business Unit in 2018–2022 and Director of Direct Sales in 2007–2018
Chief Executive Officer of Esso Lämpöpalvelu and several director-level positions at Oy Esso Ab / ExxonMobil, including Director of Wholesale & Industrial Sales, Nordic Heating Oil Manager, Director of Lubricant Logistics, and Sales Engineer in 1992–2007
Positions of trust:
- Member of the Board of Lämpöpuisto Oy in 2016–2021
Tiina Partanen
Chief Operating Officer
Chief Operating Officer and Management team member since 2025
Born 1979, female
M. Sc. in Industrial Engineering and Management
Background add
Work history:
Country Manager, Managing Director and a member of the Board of Directors at Eolus Finland Oy, a member of the Board at Eolus Offshore Finland Ab and Managing Director and a member of the Board at several SPV’s of Eolus in Finland in 2023–2025
Project Director for the F-35 forward fuselage project at Patria Aviation in 2023
Several senior leadership positions at Fennovoima, including Site Director and Delivery Director and member of the management team, Turbine Island Director, and Balance of Plant Unit Manager in 2015–2022
Head of Manufacturing at Caverion Industria/YIT Teollisuus in 2011–2015 and various project management, quality management, and nuclear project roles at YIT in 2003–2011
Lauri Muranen
Head of Public Affairs
Head of Public Affairs and Management team member since 2024
Born 1983, male
M. Sc. in Environmental Technology
Background add
Work history:
Chief Advisor, Economic Policy (Energy and Industry) at the Central Organization of Finnish Trade Unions (SAK) in 2018–2024
Executive Director of the FinNuclear Association in 2017–2018
Executive Director of World Energy Council Finland in 2015–2017
Secretary General of the Finnish Energy Council in 2011–2015
Advisor at Finnish Energy Industries in 2010–2015
Research Assistant at the Finnish Institute of International Affairs in 2008
Positions of trust:
Member of the Board of Directors of Vantaan Energia since 2025
Member of the Board of Directors of Asuntosäätiö in 2022–2025
Vice Chair of the Board of Directors of Kotkan Energia in 2018–2021
Juho Vierimaa
Head of Licensing and Quality
Head of Licensing and Quality and Management team member since 2024
Born 1974, male
M. Sc. in Engineering Physics and Mathematics
Background add
Work history:
Chief Executive Officer and Chair of the Board of Directors ad of NuConsulting Oy since 2023, and an entrepreneur at NuConsulting Oy in 2023–2024
Several licensing and nuclear safety leadership positions at Fennovoima, including Development Director, Supervision and Qualification in 2021–2023, Head of Licensing in 2018–2021, and Senior Licensing Specialist in 2015–2018
Various nuclear safety, project management and engineering roles at Fortum in 2008–2015, including Project Manager and Nuclear Safety Engineer.
