Pieter D. Wezeman

Senior Researcher

Pieter D. Wezeman

Pieter D. Wezeman is a Senior Researcher in the SIPRI Arms Transfers Programme. Within his overall objectives of contributing to the understanding of the effect armament dynamics have on peace and conflict and supporting arms control and disarmament efforts, his main areas of expertise include the global production and proliferation of arms and other military technology and trends and patterns in military expenditures. Currently, his regional focus is mainly on Europe, including Russia. Conventional arms control, international transparency in armaments, and multilateral arms embargoes are among the key thematic issues he currently works on.

Pieter started at SIPRI in 1994, worked in 2003–2006 as a Senior Analyst at the Dutch Ministry of Defence on issues related to the proliferation of conventional and nuclear weapons, and returned to SIPRI in 2006. In 2017 he was the Technical Expert for the Group of Governmental Experts that reviewed the UN Report on Military Expenditure.

Subject expertise

Arms flows to and arms procurement, arms production and military expenditure in Europe, the Middle East, North Africa; the global arms trade; conventional arms control; proliferation of missiles and other long-range strike systems; arms embargoes; sources of arms for non-state armed groups; small arms and light weapons; national and multilateral transparency in armament issues; methodology of measuring armament developments.

Regional expertise

Middle East, Northern Europe, North America

CONTACT Pieter D. Wezeman

Languages

Dutch, English, Swedish, German

Education

MA in Political Science (International Relations/Peace Studies), Radboud University, Nijmegen, the Netherlands

SIPRI COMMENTARY

Tensions on the Belarus border: A look at military spending and arms import patterns (Topical backgrounder, September 2023 )
Iraq since the invasion: 20 years in SIPRI data (Topical backgrounder, March 2023 )
Arms transfers to conflict zones: The case of Nagorno-Karabakh (Topical backgrounder, April 2021 )
Saudi Arabia, armaments and conflict in the Middle East (Topical backgrounder, December 2018 )
Increased international transparency in military spending is possible (Topical backgrounder, October 2017 )

SIPRI AND PARTNER PUBLICATIONS

Wezeman, S. T., George, M. and Wezeman, P. D., Transparency in Armaments in South East Asia: Learning from Three Decades of the United Nations Register of Conventional Arms (SIPRI, Stockholm: February 2024)
Wezeman, P. D., Djokic, K., George, M., Hussain, Z. and Wezeman, S. T., Trends in International Arms Transfers, 2023 (SIPRI, Stockholm: March 2024)
Wezeman, P. D., Gadon, J. and Wezeman, S. T., Trends in International Arms Transfers, 2022 (SIPRI, Stockholm: March 2023)
Varisco, A. E., Wezeman, P. and Kuimova, A. , Illicit Small Arms and Light Weapons in Sub-Saharan Africa: Using UN Reports on Arms Embargoes to Identify Sources, Challenges and Policy Measures (SIPRI, Stockholm: December 2022)
Wezeman, P. D., Kuimova, A., Wezeman, S. T., Trends in International Arms Transfers, 2021 (SIPRI, Stockholm: March 2022)
Wezeman, P. et al., A Practical Guide to State Participation in the UN Report on Military Expenditures (SIPRI, Stockholm: September 2022)
Wezeman, P. D., Kuimova, A. and Wezeman, S. T., Trends in International Arms Transfers, 2020 (SIPRI, Stockholm: March 2021)
Tian, N., Kuimova, A., Lopes da Silva, D., Wezeman, P. D. and Wezeman, S. T., Trends in World Military Expenditure, 2019 (SIPRI, Stockholm: April 2020)
Béraud-Sudreau, L., Marksteiner, A., Lopes da Silva, D., Tian, N., Kuimova, A., Wezeman, P. D and Wezeman, S. T. , Mapping the International Presence of the World’s Largest Arms Companies (SIPRI, Stockholm: December 2020)
Emerging Suppliers in the Global Arms Trade (SIPRI, Stockholm: December 2020)
Wezeman, P. D., Fleurant, A., Kuimova, A., Lopes Da Silva, D., Tian, N. and Wezeman, S. T., Trends in International Arms Transfers, 2019(Stockholm: (March 2020)
Addressing Missile Threats in the Middle East and North Africa (SIPRI, Stockholm: November 2020)
Wezeman, P. D., Béraud-Sudreau, L. and Wezeman, S. T., Transparency in Arms Procurement: Limitations and Opportunities for Assessing Global Armament Developments (SIPRI, Stockholm: October 2020)
Trends in World Military Expenditure, 2018 (SIPRI, Stockholm: April 2019)
The SIPRI Top 100 Arms-producing and Military Services Companies, 2018 (SIPRI, Stockholm: December 2019)
Trends in International Arms Transfers, 2018 (March 2019)
Military Spending and Arms Imports by Iran, Saudi Arabia, Qatar and the UAE (SIPRI, Stockholm: May 2019)
The SIPRI Top 100 Arms-producing and Military Services Companies, 2017 (December 2018)
Trends in International Arms Transfers, 2017 (SIPRI, Stockholm: March 2018)
Trends in World Military Expenditure, 2017 (SIPRI, Stockholm: May 2018)
Military Expenditure Transparency in Sub-Saharan Africa (November 2018)
Tian, N., Fleurant, A., Wezeman, P. D. et al., Trends in World Military Expenditure, 2016 (April 2017)
The SIPRI Top 100 Arms‑producing and Military Services Companies, 2016 (December 2017)
Fleurant, A., Wezeman, P. D., Wezeman, S. T. et al, Trends in International Arms Transfers, 2016 (February 2017)
Perlo-Freeman, S., Fleurant, A., Wezeman, P. D. and Wezeman, S. T., Trends in World Military Expenditure, 2015 (April 2016)
Fleurant, A., Perlo-Freeman, S., Wezeman, P. D. et al, The SIPRI Top 100 Arms-producing and Military Services Companies, 2015 (December 2016)
Perlo-Freeman, S., Fleurant, A., Wezeman, P. D. and Wezeman, S. T., Trends in International Arms Transfers, 2015 (February 2016)
Trends in World Military Expenditure, 2014 (April 2015) 8 pp.
The SIPRI Top 100 Arms-producing and Military Services Companies, 2014 (December 2015) 8 pp.
Wezeman P. D. and Wezeman S. T., Trends in International Arms Transfers, 2014 (SIPRI, Stockholm: March 2015) 8 pp.
The SIPRI Top 100 Arms-producing and Military Services Companies, 2012 (January 2014) 8 pp.
Trends in International Arms Transfers, 2013 (March 2014) 8 pp.
Holtom, P., Bromley, M., Wezeman, P.D. et al, Trends in International Arms Transfers, 2012 (March 2013) 8 pp.
Holtom, P., Bromley, M., Wezeman, P.D. et al, Trends in International Arms Transfers, 2011 (March 2012) 8 pp.
Arms Flows to Sub-Saharan Africa (December 2011) 49 pp.
South African Arms Supplies to Sub-Saharan Africa (January 2011) 16 pp.
Conventional strategic military capabilities in the Middle East (July 2011) 15
Arms exports to Sudan (March 2011) 95
Holtom, P., Bromley, M., Wezeman, P.D. et al, Trends in International Arms Transfers, 2010 (March 2011) 8 pp.
Holtom, P., Bromley, M., Wezeman, S. et al, Trends in International Arms Transfers, 2009 (March 2010) 8 pp.
Military Spending and Arms Procurement in the Gulf States (October 2010) 4 pp.
Arms Flows and the Conflict in Somalia (October 2010) 12 pp.
Arms Transfers to Central, North and West Africa (April 2009) 16 pp.
Holtom, P., Bromley, M., Wezeman, P.D. et al, SIPRI Arms Transfers Data, 2008 (April 2009) 8 pp.
Bromley, M., Holtom, P., Perlo-Freeman, S. et al , Recent Trends in the Arms Trade (April 2009) 24 pp.
Arms Flows to the Conflict in Chad (August 2009) 12 pp.
Arms Transfers to East and Southern Africa (December 2009) 8 pp.

6. International arms transfers (Chapter, SIPRI Yearbook 2024)
10. Conventional arms control and the regulation of inhumane weapons (Chapter, SIPRI Yearbook 2024)
12. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2024)
10. Conventional arms control and regulation of new weapon technologies (Chapter, SIPRI Yearbook 2023)
12. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2023)
6. International arms transfers (Chapter, SIPRI Yearbook 2023)
9. International arms transfers (Chapter, SIPRI Yearbook 2022)
13. Conventional arms control and regulation of new weapon technologies (Chapter, SIPRI Yearbook 2022)
14. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2022)
14. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2021)
9. International arms transfers and developments in arms production (Chapter, SIPRI Yearbook 2021)
13. Conventional arms control and regulation of new weapon technologies (Chapter, SIPRI Yearbook 2021)
8. Military expenditure (Chapter, SIPRI Yearbook 2020)
9. International arms transfers and developments in arms production (Chapter, SIPRI Yearbook 2020)
14. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2020)
4. Military expenditure (Chapter, SIPRI Yearbook 2019)
5. International arms transfers and developments in arms production (Chapter, SIPRI Yearbook 2019)
10. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2019)
4. Military expenditure (Chapter, SIPRI Yearbook 2018)
5. International arms transfers and developments in arms production (Chapter, SIPRI Yearbook 2018)
10. Dual-use and arms trade control (Chapter, SIPRI Yearbook 2018)
19. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2016)
3. Armed conflict and instability in the Middle East and North Africa (Chapter, SIPRI Yearbook 2017)
9. Military expenditure (Chapter, SIPRI Yearbook 2017)
10. International arms transfer and developments in arms production (Chapter, SIPRI Yearbook 2017)
15. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2017)
9. Military expenditure (Chapter, SIPRI Yearbook 2015)
10. International arms transfers and arms production (Chapter, SIPRI Yearbook 2015)
15. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2015)
2. The armed conflicts in Syria and Iraq (Chapter, SIPRI Yearbook 2015)
10. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2014)
1. Aspects of the conflict in Syria (Chapter, SIPRI Yearbook 2014)
4. Military expenditure and arms production (Chapter, SIPRI Yearbook 2014)
5. International arms transfers (Chapter, SIPRI Yearbook 2014)
5. International arms transfers (Chapter, SIPRI Yearbook 2013)
10. Dual-use and arms trade controls (Chapter, SIPRI Yearbook 2013)
6. International arms transfers (Chapter, SIPRI Yearbook 2012)
10. Conventional arms control (Chapter, SIPRI Yearbook 2012)
6. International arms transfers (Chapter, SIPRI Yearbook 2011)
Appendix 11A. Multilateral arms embargoes, 2010 (Chapter, SIPRI Yearbook 2011)
7. International arms transfers (Chapter, SIPRI Yearbook 2010)
Appendix 12A. Multilateral arms embargoes, 2009 (Chapter, SIPRI Yearbook 2010)
7. International arms transfers (Chapter, SIPRI Yearbook 2009)
7. International arms transfers (Chapter, SIPRI Yearbook 2008)
10. International arms transfers (Chapter, SIPRI Yearbook 2007)
13. International arms transfers (Chapter, SIPRI Yearbook 2003)
8. International arms transfers (Chapter, SIPRI Yearbook 2002)
Appendix (Chapter, SIPRI Yearbook 2002)
Appendix 13A. The UN conference on the illicit trade in small arms and light weapons (Chapter, SIPRI Yearbook 2002)
5. Transfers of major conventional weapons (Chapter, SIPRI Yearbook 2001)

External publications

Wezeman, P. D., 'International arms flows: monitoring, sources and obstacles', Clingendael Report, Jan. 2018
Wezeman, P. D., 'Arms exports and developments in the Middle East’ and ‘Improvised Explosive Devices', in Literature review for the Policy and Operations Evaluations Department of the Dutch Ministry of Foreign Affairs, Aug. 2017
Wezeman,P.D., (lead author) Industrial analysis of CDP priority actions in the field of protection of forces in theatre, C-IED and C-CBRNE capabilities, European Defence Agency, 2016
Wezeman, P. D., Conventional strategic military capabilities in the Middle East, in: WMD Arms Control in the Middle East, Ashgate, 2015
Gill, B., and Wezeman, P. D., 'Halte au cynicisme! Il faut un commerce des armes plus responsable' [Stop the cynicism! We need a more responsible arms trade], Le Monde, 20 Apr. 2011
Holtom, P., and Wezeman, P. D., 'Arms exports to Sudan', Written evidence submitted for the UK House of Lords’ EU Sub-Committee on Foreign Affairs, Defence and Development Policy inquiry into the European Union’s Conflict Prevention Role in Sudan, Mar. 2011