Hwsi GMBH

Hwsi GMBH, doing business as Hwsi Hinterobermaier - Wartung - Service - Installationen, is an Austrian for-profit facilities maintenance and HVAC contractor that serves as a prime contractor exclusively to the U.S. Department of State for heating, ventilation, air-conditioning, plumbing, and bathroom renovation work at U.S. diplomatic facilities in Austria. The vendor competes full-and-open with no small business set-aside posture across all 38 federal awards in its footprint.

The company's customer base is entirely concentrated within State Department bureaus. The Bureau of Overseas Building Operations dominates by both volume and dollar value, with 24 awards carrying $1.8 million in combined potential value; the Bureau of European and Eurasian Affairs accounts for 13 awards valued at $162 thousand; and the Bureau of Diplomatic Security placed a single $12 thousand award. Work is performed exclusively in Austria at U.S. government-owned residential and office properties in Vienna and surrounding areas. Recent representative contracts include a $190.6 thousand definitive contract awarded July 10, 2026, for replacement of 73 fan coil units at the U.S. Embassy Vienna with ultimate completion February 27, 2027; a $238.8 thousand contract awarded February 6, 2024, for restoration of shafts and bathrooms; a $151.6 thousand contract awarded May 31, 2024, for master bathroom restoration; and a $251.8 thousand base-year contract awarded May 1, 2022, for preventive maintenance services on HVAC systems at multiple USG-owned residences in Vienna through March 10, 2026. Scope of work consistently involves decommissioning and disposal of existing equipment, delivery and installation of replacement units with associated piping, valves, and controls, reconnection of water and condensate lines, pipe insulation, electrical connection, hydraulic balancing, commissioning, and technical documentation.

The vendor holds primary NAICS 238220 (Plumbing, Heating, and Air-Conditioning Contractors), which accounts for 31 of 38 awards. Work is also classified under PSC J041 (Maintenance/Repair/Rebuild of Equipment—Refrigeration, Air Conditioning, and Air Circulating Equipment) and PSC Z2FA (Repair or Alteration of Family Housing Facilities). Activity has been episodic: seven awards in 2021, three in 2022, five in 2024, three in 2025, and three in 2026. Four awards carrying $342 thousand in combined potential value reach ultimate completion inside the next twenty-four months. The vendor holds two expired Blanket Purchase Agreements with the Bureau of European and Eurasian Affairs for minor HVAC, sanitary, and electrical repairs and materials, one carrying a $20 thousand ceiling and expiring September 30, 2022, and a second with zero dollars potential value expiring September 30, 2023. Combined obligated dollars across all awards total $1.8 million, representing 90% of combined potential value, indicating strong execution against awarded work.