Verified Nov 2026
Tool & Die
·
Osnabrueck, Lower Saxony
·
Since 1938
Köster GmbH is a family-owned German construction contractor founded in 1938 and headquartered in Osnabrück, Lower Saxony. With 1,000–5,000 employees and estimated revenue of $1–5 billion, it operates across 21 locations in Germany. The company provides high-rise construction, civil engineering, tunnel construction, and turnkey project delivery to automotive, renewable-energy, and industrial clients. Recent work includes a new production facility for BPW in Wiehl and housing developments across northern Germany.
Köster GmbH at a glance
Revenue
$1-5B
Est. band
Employees
1,000-5,000
Founded
1938
Headquarters
Osnabrueck, Lower Saxony
Certifications
ISO 14001 · ISO 45001 · ISO 9001
Industries
Automotive
Electric Vehicles
Construction
Renewable Energy
Industrial Equipment
STABILITY SIGNALS
Established & active
88 years in operation (founded 1938).
Holds ISO 14001, ISO 45001, ISO 9001 certification(s) per public sources.
Overview
Köster GmbH is a family-owned German construction contractor founded in 1938 and headquartered in Osnabrück, Lower Saxony. With 1,000–5,000 employees and estimated revenue of $1–5 billion, it operates across 21 locations in Germany. The company provides high-rise construction, civil engineering, tunnel construction, and turnkey project delivery to automotive, renewable-energy, and industrial clients. Recent work includes a new production facility for BPW in Wiehl and housing developments across northern Germany.
At a glance
Attribute | Detail |
|---|---|
Founded | 1938 |
Headquarters | Osnabrueck, Lower Saxony |
Employees | 1,000-5,000 |
Revenue | $1-5B (estimated) |
Primary capability | Tool & Die |
Certifications | ISO 14001 · ISO 45001 · ISO 9001 |
What Köster GmbH makes
The company holds ISO 9001, ISO 14001, and ISO 45001 certifications and offers services in high-rise and specialist deep-foundation work, tunnel construction via subsidiary Baresel Tunnelbau GmbH, and building information modeling.
Certifications
Köster GmbH is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
ISO 14001 — koester-bau.de
ISO 45001 — koester-bau.de
ISO 9001 — koester-bau.de
Latest developments
2026-10-30 — Köster realisiert Verbindung von Denkmalschutz und Barrierefreiheit - 2026 - News - Köster GmbH (koester-bau.de)
2026-10-19 — Start frei für Osnabrücks größtes Neubauquartier - 2026 - News - Köster GmbH (koester-bau.de)
2026-10-08 — 45 neue geförderte Wohnungen für Rendsburg - 2026 - News - Köster GmbH (koester-bau.de)
2026-09-28 — Köster realisiert Neubau der Norddeutschen Akademie der Finanzen und Steuerrecht(NoA) - 2026 - News - Köster GmbH (koester-bau.de)
2026-06-30 — Köster baut neue Produktionshalle für BPW in Wiehl - 2026 - News - Köster GmbH (koester-bau.de)
2026-03-28 — Köster baut 40.000 m² Hallenfläche für Projektentwickler BGAR und Mieter BMW - 2026 - News - Köster GmbH (koester-bau.de)
Company details
Köster remains privately held by the founding family and operates the Köster-Gruppe holding structure encompassing multiple subsidiaries. Köster GmbH was founded in 1938, has an estimated 1,000-5,000 employees, and is headquartered in Osnabrueck, Lower Saxony. On the LightSource stability read it is rated "Established & active": 88 years in operation (founded 1938). Holds ISO 14001, ISO 45001, ISO 9001 certification(s) per public sources.
Frequently asked questions
What does Köster GmbH make?
Köster GmbH is a family-owned German construction contractor founded in 1938 and headquartered in Osnabrück, Lower Saxony. With 1,000–5,000 employees and estimated revenue of $1–5 billion, it operates across 21 locations in Germany. The company provides high-rise construction, civil engineering, tunnel construction, and turnkey project delivery to automotive, renewable-energy, and industrial clients. Recent work includes a new production facility for BPW in Wiehl and housing developments across northern Germany.
Where is Köster GmbH headquartered?
Köster GmbH is headquartered in Osnabrueck, Lower Saxony (280 Sutthauser Strasse, Osnabrueck, Lower Saxony, 49080).
When was Köster GmbH founded?
Köster GmbH was founded in 1938.
How big is Köster GmbH?
Köster GmbH has an estimated 1,000-5,000 employees, with revenue in the $1-5B range (estimated).
What certifications does Köster GmbH hold?
Köster GmbH lists ISO 14001 · ISO 45001 · ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
Related suppliers
Explore other suppliers in the LightSource directory:
Last verified Nov 2026. Is this your company? Request a correction.
Location & contact
Evaluating suppliers like these?
This profile comes from a public-data sample of around 1,000 companies. Book a demo to see the full LightSource marketplace and supplier discovery platform — 1M+ credible suppliers, with AI-run sourcing events.