Manufacturer catalog

Rosomak S.A.

Rosomak S.A. is a Polish combat-vehicle manufacturer and support company in Siemianowice Slaskie, best known in this catalog for building and servicing the KTO Rosomak wheeled armored vehicle family derived from Patria AMV technology.

2 weapons

Rosomak S.A. traces its current defense-industrial role to Military Mechanical Works, established in Siemianowice Slaskie in 1952 as a state enterprise focused on military vehicle repair. The company moved from tank repair and modernization work into armored reconnaissance-vehicle upgrades and then into licensed wheeled armored-vehicle production for the Polish Ministry of National Defence.

The builder's catalog connection is the KTO Rosomak family. Patria's program history describes technology transfer to Rosomak S.A., then known as WZM S.A., and local Polish production of the Patria AMV-based vehicle in Siemianowice. Rosomak's own company history says the firm changed its name from Military Mechanical Works JSC to Rosomak JSC in 2014 after the vehicle's recognition and export value grew.

Wheeled armored vehiclescombat-vehicle manufacturingcombat-vehicle servicingspecialized Rosomak variantsvehicle lifecycle support and training

Notable Systems

KTO Rosomak, 8x8 wheeled armored personnel carrier / infantry fighting vehicle family, Armored Vehicles

KTO Rosomak / Rosomak armored modular vehicle family

8x8 wheeled armored personnel carrier / infantry fighting vehicle family

Polish Patria AMV-derived 8x8 armored vehicle family produced and supported by Rosomak S.A. in Siemianowice Slaskie, including infantry fighting, command, reconnaissance, medical evacuation, technical support, and mortar-carrier variants.

Sources: Rosomak armored modular vehicles, Patria KTO Rosomak case study

LEGWAN 4x4

Protected 4x4 vehicle listed in Rosomak's current product portfolio for varied operational needs, with STANAG 4569 Level I ballistic protection and modular specialized-version potential.

Sources: Rosomak LEGWAN 4x4

Manufacturer History

  1. Military Mechanical Works established

    The precursor of Rosomak S.A. was established in Siemianowice Slaskie as Military Mechanical Works, beginning with military vehicle and T-34 tank repair.

    Sources: Rosomak company page, Rosomak 65th anniversary notice

  2. Rosomak vehicle contract signed

    Rosomak's company history records an April 2003 Polish Ministry of National Defence agreement for hundreds of wheeled armored transporters, moving the firm into the Rosomak vehicle program.

    Sources: Rosomak company page, Rosomak 65th anniversary notice

  3. Patria technology transfer launched

    Patria states that its technology-transfer project supplied manufacturing data and know-how to Rosomak S.A. and modernized the Siemianowice production facilities.

    Sources: Patria KTO Rosomak case study

  4. Field support role during ISAF service period

    Rosomak's own history says company personnel supported AMV Rosomak service and maintenance during the 2007-2014 ISAF period.

    Sources: Rosomak company page

  5. Renamed Rosomak JSC

    The company says it changed its name from Military Mechanical Works JSC to Rosomak JSC in 2014, reflecting the Rosomak vehicle brand's recognition.

    Sources: Rosomak company page

  6. More than 800 APCs delivered

    Rosomak's company history says it had delivered more than 800 armored personnel carriers in various versions by 2020.

    Sources: Rosomak company page

Predecessors
Military Mechanical Works JSCWZM S.A.
Website links
Official websiteCompany pagePolish Defence Companies Portal profilePatria KTO Rosomak case study

Rosomak S.A. is a PGZ-majority-owned Polish defense company. The profile uses official company and partner sources for corporate history and avoids conflict-use claims, which belong in weapon entries.

Manufacturer Sources

  • Rosomak company pagePublisher: Rosomak S.A. | Note: Official company page supporting Rosomak S.A. history, 1952 founding as Military Mechanical Works, current combat-vehicle manufacturing and servicing role, headquarters address, 2014 name change, deliveries, and shareholder table. | Accessed: 2026-06-21
  • Rosomak 65th anniversary noticePublisher: Rosomak S.A. | Note: Official anniversary notice supporting the May 22, 1952 establishment of Military Mechanical Works, the 2003 wheeled armored vehicle contract, and the later decision to adopt the Rosomak name. | Accessed: 2026-06-21
  • Polish Defence Companies Portal profilePublisher: Defense Sector Entrepreneur Portal | Note: Government defense-sector portal profile supporting Rosomak S.A.'s address, land-segment activity, combat-vehicle manufacturing, development, servicing, training, and Rosomak product family focus. | Accessed: 2026-06-21
  • Patria KTO Rosomak case studyPublisher: Patria | Note: Patria program case study supporting the WZM S.A. former-name context, Patria AMV technology transfer, Siemianowice production modernization, Polish local production, and Rosomak S.A. role in the KTO Rosomak program. | Accessed: 2026-06-21
  • Rosomak armored modular vehiclesPublisher: Rosomak S.A. | Note: Official product page supporting Rosomak armored modular vehicle family variants listed by the builder. | Accessed: 2026-06-21
  • Rosomak LEGWAN 4x4Publisher: Rosomak S.A. | Note: Official product page supporting the LEGWAN 4x4 product summary, protection level, mobility details, and Rosomak's broader vehicle portfolio. | Accessed: 2026-06-21
  • File:Siemianowice Rosomak.jpgPublisher: Wikimedia Commons | Note: Image provenance and licensing page for the Rosomak S.A. factory photograph in Siemianowice Slaskie, credited to Adrian Tync and licensed under Creative Commons Attribution-ShareAlike 4.0. | Accessed: 2026-06-21

Produced weapons

Category

Armored Vehicles

Troop carriers, infantry fighting vehicles, and protected mobility.

1/1
KTO Rosomak, 8x8 wheeled armored personnel carrier / infantry fighting vehicle family, Armored Vehicles2001 War in Afghanistan, 2014 Russia-Ukraine WarKTO Rosomak8x8 wheeled armored personnel carrier / infantry fighting vehicle familyBuilt in: PolandThe KTO Rosomak is Poland's licensed Patria AMV-based 8x8 armored vehicle family, built by Rosomak S.A. in Siemianowice Slaskie for infantry transport, fire support, medical evacuation, command, and specialist support roles. Patria traces the program to a 2003 technology-transfer start, Polish combat use in Afghanistan, and a fleet that grew toward 900 vehicles; Ukraine's Ministry of Defence later described Rosomak APCs, Hitfist-30P combat variants, and Rak mortar carriers in Ukrainian service.

Category

Artillery

Tube artillery, rocket artillery, and long-range ground fires.

1/1