What SALKO-Bau does

SALKO-Bau GmbH is a German general contractor specializing in telecommunications civil engineering, with a particular focus on fiber optic network rollout (Glasfaserausbau). Founded in 2012 by Nazim Kosuta and now led by second-generation Managing Director Salko Kosuta (since 2018), the company is headquartered in Bissendorf, Lower Saxony, and operates as a subsidiary within the Circet Deutschland group. Its core service portfolio spans cable duct construction (Kabelleitungsbau), earthworks and civil engineering (Erd- und Tiefbau), cable pulling, horizontal directional drilling (HDD), copper and fiber optic assembly, project planning and design, technical documentation, maintenance and fault diagnosis, and a 24-hour on-call emergency service. Notable technical differentiators include a proprietary Spülbohrverfahren (flushing/jet drilling method) that enables disruption-free conduit installation under heavily trafficked intersections and modern Saugbagger (suction excavator) technology that preserves tree roots during construction.

The business is structured as a B2B project-based professional services firm, executing fiber and telecom infrastructure projects as general contractor under direct contract with major German telecommunications providers — Deutsche Telekom, Vodafone, and Glasfaser Nordwest. Active projects span multiple German states including Lower Saxony, North Rhine-Westphalia, and Schleswig-Holstein, with named engagements such as a 10,000-connection build for Vodafone in the Celle district and a 5,900-meter fiber rollout in Jemgum-Ditzum for Glasfaser Nordwest. Pricing is negotiated on a project basis with no public pricing disclosure.

SALKO-Bau has scaled rapidly, growing from 15 employees in 2020 to 60+ by 2023 and reaching reported revenue of €40 million in 2023 with €55 million in confirmed orders for 2024. Capacity buildout continued through 2024 with a new ~700 sqm office / 2,000 sqm storage headquarters in Bissendorf's Natberger Feld industrial area and a significant fleet expansion, followed by the launch of an in-house vocational training program in August 2025. Customer acquisition is driven by direct enterprise sales relationships, industry event presence (ANGA COM, Fiberdays), and group-level access via the Circet Deutschland parent, rather than traditional consumer marketing.

Name

SALKO-Bau

Legal name

SALKO-Bau GmbH

Website

https://salko-bau.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

51–100 employees

Short description

SALKO-Bau GmbH is a German B2B general contractor specializing in fiber optic network construction and telecommunications civil engineering, serving Deutsche Telekom, Vodafone, and Glasfaser Nordwest on rollout projects across Germany.

Ownership category

akta.pro rank

Product category

Telecommunications Infrastructure Construction

NAICS

Power and Communication Line and Related Structures Construction (237130), Utility System Construction (2371)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600), Construction - Special Trade Contractors (1700)

akta.pro primary industry

Telecom, SCADA & OPGW/Fiber Integration for T&D Projects (EUAEABAG)

akta.pro secondary industries

Underground transmission & distribution cable EPC (civil + cable install) (EUADAKAB), Overhead & Underground Collection System Construction (MV/HV Lines, Duct Banks) (EUAEADAG)

Keywords

• Fiber optic construction
• Telecommunications civil engineering
• Cable network installation
• Horizontal directional drilling
• Fiber rollout services

Headquarters

HQ city

Bissendorf

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Supply Chain, Marketing or Sales

Revenue model

1. Infrastructure Construction Services: Project-based revenue from fiber optic network construction and telecommunications infrastructure projects as a general contractor. Revenue derived from civil engineering, cable laying, and installation services for telecom providers.
2. Maintenance and Emergency Services: Revenue from ongoing maintenance contracts and 24-hour on-call emergency services for completed infrastructure.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

SALKO-Bau GmbH is a general contractor for telecommunications infrastructure, specializing in fiber optic network rollout (Glasfaserausbau) and civil engineering across Germany. The company delivers end-to-end services including cable duct construction, earthworks and civil engineering, cable pulling, horizontal directional drilling, copper and fiber optic assembly, project planning, technical documentation, and 24-hour maintenance and emergency response for telecom providers.

Product overview

SALKO-Bau GmbH is a general contractor specializing in telecommunications infrastructure and civil engineering. The company operates as a unified service offering centered on fiber optic network deployment (Glasfaserausbau), supported by complementary construction and technical services. Core offerings include cable duct construction (Kabelleitungsbau), earth and civil engineering (Erd- und Tiefbau), cable pulling (Kabeleinziehtechnik), horizontal drilling (Horizontalbohrungen), copper and fiber optic assembly (Kupfermontage, Glasfasermontage), alongside supporting services for documentation, maintenance, 24-hour emergency response, and project planning. The portfolio is designed for end-to-end delivery of telecommunications infrastructure from planning through construction to ongoing maintenance.

Differentiator

Problem solved

Functional benefit

Products and services

• Kabelleitungsbau (Cable Duct Construction)

Quantifiable outcome

• Projects completed on schedule even with unexpected setbacks, demonstrating reliability
• +1 more outcomes

Named customers3 records

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Circet DeutschlandcoreStrategic or Co-development PartnerParent company of SALKO-Bau. Circet Deutschland is part of the Circet Group, a major European telecommunications infrastructure provider. SALKO-Bau operates under the Circet umbrella and participates in industry events alongside the parent company.
• Deutsche TelekomcoreChannel Partner/ Reseller/ DistributorMajor telecommunications provider that engages SALKO-Bau as general contractor for fiber optic network construction projects across Germany.
• VodafonecoreChannel Partner/ Reseller/ DistributorInternational telecommunications company that contracts SALKO-Bau for fiber optic infrastructure projects, including the 10,000-home project in Celle district.
• Glasfaser NordwestcoreChannel Partner/ Reseller/ DistributorRegional fiber optic provider engaging SALKO-Bau for multiple fiber expansion projects including Lemgo, Bad Lippspringe, Ahlerstedt, Waddewarden, and Jemgum-Ditzum.
• MAM-BauminorStrategic or Co-development PartnerPartner company from Ibbenbüren with whom SALKO-Bau holds joint team events and maintains collaborative relationship.
• Circet Deutschland Whistleblower PlatformminorOthersWhistleblower platform (Hinweisgeber-Meldeplattform) provided through Innungsservice in cooperation with Circet Deutschland, accessible via signalement.net.
• Planten & Proten (Ditzum)minorOthersLocal community association from Ditzum that provides free storage space for the Jemgum-Ditzum fiber project, reducing transportation needs and enabling efficient construction.

Scale indicators6 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• LEONHARD WEISS GmbH & Co. KG: Large German construction group with a dedicated infrastructure/telecom civil-engineering division offering Tiefbau, cable laying, and fiber rollout services across Germany, directly overlapping SALKO-Bau's core offering.
• vitronet GmbH: German specialist contractor focused on FTTH/FTTC network rollout for telecom operators; competes directly with SALKO-Bau for general contractor roles on German fiber deployment projects.
• Connect Com GmbH: German specialist in fiber optic network construction, splicing, and broadband infrastructure deployment; directly comparable niche German fiber rollout contractor competing in the same customer set.

Broad incumbents

• Axians Germany (VINCI Energies): Telecommunications infrastructure services brand of VINCI Energies in Germany; provides telecom network construction and maintenance, overlapping with SALKO-Bau's full service portfolio but with much broader geographic and capability scope.
• STRABAG AG: Major European construction group with civil engineering and telecom infrastructure capabilities; relevant as a large incumbent competing for the same German fiber rollout tenders that SALKO-Bau bids on.
• Ed. Züblin AG: Large German civil engineering contractor (STRABAG subsidiary) with significant Tiefbau and infrastructure work including utility line projects; competes for major fiber rollout contracts alongside SALKO-Bau at the higher end of project scale.

Others

• Circet Deutschland: Parent company of SALKO-Bau and part of the pan-European Circet Group; SALKO-Bau operates under this umbrella, so while not a competitor, it is the most closely related entity for capability, geography, and customer-overlap benchmarking.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/salkobaugmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SALKO-Bau