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Davidsson Tarkela Siren Arkkitehdit Oy
OY
Active
Y-tunnus 1025174-3
Kasarmikatu 36, 00130
Helsinki
Architectural activities
· NACE 7111
Est. 1995
21 employees
www.dtsa.fi
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Davidsson Tarkela Siren Arkkitehdit Oy
Overview
Financials
People & ownership
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People & ownership
Management
Actively employed in the business
Name
Role
Member since
Current (2)
NM
Niklas Mahlberg
Chief Executive Officer
Chief Executive Officer
2020
LO
Leif Olav Sebbas
Deputy Member
Deputy Member
2022
Former (3)
HU
Henrik Ulf Einar Juth
Audit
Audit
2018 – 2020
SM
Satu Maarit Peltonen
Audit
Audit
2020 – 2023
LA
Leo Akilles Davidsson
Chief Executive Officer
Chief Executive Officer
1995 – 2020
Board of directors
Non-executive oversight
Name
Role
Member since
Current (2)
JG
Johan Georg Ehrnrooth
Chairperson
2025
MS
Mikko Sakari Lukkaroinen
Board of Directors
2025
Former (3)
SN
Stefan Nyström
Board of Directors
2020 – 2022
MK
Minni Kaarina Lempinen
Board of Directors
2018 – 2019
JA
Jaana Anneli Tarkela
Board of Directors
2018 – 2022
Shareholders
As of last annual report
No shareholder data available.
Beneficial ownership (UBO) data access is restricted in Denmark as of September 2025 per the EU 6th AML Directive.
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