Photo of Mika Siren

Mika Siren

Senior Scientist, MSc.

  • Phone+358503601591
1991 …2020

Research output per year

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Personal profile

Expertise area

Mika Sirén is a Senior Scientist at VTT Technical Research Centre of Finland and has more than 25 years of experience in implementing and managing public, private and jointly funded EU and national R&D projects in welding and manufacturing, advanced materials and solid state joining. His scientific interests include welding technologies, high strength stainless and structural steel welding metallurgy and more recently welding simulation.


In 1990 - 1991 he worked at VTT as a research trainee on vacuum brazing and diffusion bonding of ceramics to metals and also prepared his M.Sc. thesis on the subject. From 1991 to 2009 he worked at VTT as a Research Scientist (regular staff since 1995), and since 2009 as a Senior Research Scientist. He has been acting as a project manager on several public, private and joint funded national and EU R&D projects. In 1998 - 1999 he was a visiting research scientist and an EU Marie Curie fellow in GKSS Forschungszentrum Geesthacht GmbH in Germany for twelve months in the field of solid state joining of intermetallic compounds. He spent a total of nine months as a visiting researcher in the Korean top technical university KAIST (Korea Advanced Institute of Science and Technology) Dept. of Mechanical Engineering in 2014 to 2016.


He holds an M.Sc. in materials science from Tampere University of Technology, an IIW International Welding Engineer qualification (IWE), an International Project Management Association Project Manager certification (IPMA Level C) and modules 1, 4 and 5 of the International Mechanised, Orbital and Robot Welding qualification (IMORWP). He has authored or co-authored more than 100 publications at VTT on welding technologies, welded lightweight structural applications, as well as advanced and dissimilar materials joining. Mika Sirén is active in various functions in Welding Society of Finland (WSF) since 2002, including the chairmanship of the international qualification training Governing Board since 2016, and participates in the International Institute of Welding (IIW) activities as an expert since 2004, and later on as the national delegate in three committees.

Education/Academic qualification

Business and administration, Other


Award Date: 12 Oct 2011

Manufacturing and processing, Other

6 Oct 200827 Mar 2009

Award Date: 16 Apr 2009

External positions

Visiting researcher, Korea Advanced Institute of Science and Technology (KAIST)

Sep 2014Nov 2016


1 Sep 199831 Aug 1999

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ÄVE: Älykäs Valmistus Ekosysteemissä

Siren, M. & Pulkkinen, A.


Project: Business Finland project

FIDIPRO NA: Digital materials engineering and modelling of mass and heat flow for optimisation of joining of materials

Siren, M., Kujanpää, V., Niemi, T., Karhu, M., Kjäldman, L., Martikainen, H. & Na, S.


Project: Business Finland project

Research Output

ÄVE - Älykäs Valmistus Ekosysteemissä. Tulosraportti 2019

Translated title of the contribution: IME - Intelligent Manufacturing Ecosystem. Result report 2019Heininen, A. (ed.), Siren, M. (ed.), Hillman, L. (ed.) & Koskinen, K. (ed.), 23 Apr 2020, VTT Technical Research Centre of Finland. 33 p.

Research output: Book/ReportReport

Open Access
  • 76 Downloads (Pure)

    30 vuotta kansainvälistä pätevöityskoulutusta Suomessa

    Siren, M. & Kauppila, J., 20 Apr 2019, In : Hitsaustekniikka. 71, 2, p. 25-28

    Research output: Contribution to journalArticleProfessional

    Quo vadis, hitsauskoulutus?

    Siren, M. & Kauppila, J., 14 Sep 2018, In : Hitsaustekniikka. 70, 4, p. 2-3 2 p.

    Research output: Contribution to journalArticleProfessional

    Open Access
    14 Downloads (Pure)

    3D-tulostus ja lämpökäsittely - prosessiparametrit, muodostuvat mikrorakenteet ja lämpökäsittelyt

    Sirén, M., 2017. 29 p.

    Research output: Contribution to conferenceOther conference contributionProfessional

    Open Access


    • 3 Oral presentation

    30th Anniversary of International Welding Qualification in Finland in 2019

    Mika Siren (Speaker)

    25 Apr 2019

    Activity: Talk or presentation typesOral presentation



    Mika Siren (Speaker)

    24 Apr 2019

    Activity: Talk or presentation typesOral presentation


    Säde-, hybridi- ja kitkahitsauksen laatukysymykset

    Mika Siren (Speaker)

    31 Oct 2018

    Activity: Talk or presentation typesOral presentation