STF Group
STF Group is a family-owned German engineering services firm with 600+ employees providing integrated telecommunications planning, digitalization, and technical building equipment services to enterprise and public-sector clients across Germany and Austria.
- Company typePrivate
- Founded1997
- HeadquartersDülmen, Germany
- Headcount501–1,000
- GTM typeB2B
- OfferingServices
What STF Group does
STF Group is a family-owned German engineering services firm founded in 1997 and headquartered in Dülmen, operating from 19 office locations across Germany with additional presence in Austria. The company delivers integrated 360-degree engineering services organized under three wholly-owned subsidiaries — STF TeleConsult (telecommunications infrastructure planning), STF ITech (digitalization, IT, and digital twins), and STF Energy GmbH (technical building equipment, TGA) — serving enterprise and public-sector clients including Deutsche Telekom, Vodafone, 1&1 Versatel, Ericsson, Deutsche Bahn, BDBOS, Accenture, and numerous municipalities.
The service portfolio spans the full project lifecycle (consulting, measurement, planning, construction supervision, commissioning, and managed services) across radio network planning (GSM through 5G and private campus networks), broadband and fiber rollout, mobile network measurement via the proprietary CELL Track platform, Digital Twin creation through laser scanning and drone-based photogrammetry integrated with BIM/GIS, BOS digital radio planning for public-safety buildings, WiFi planning, and full HOAI-compliant TGA planning (heating, ventilation, electrical, plumbing, building automation, fire protection). Proprietary technical differentiators include the CELL Track measurement solution (supporting all mobile standards including 5G, with German-hosted DSGVO-compliant GIS platform) and the integrated Scan2BIM/BIM2GIS methodology. The firm holds ISO 27001-based ISMS, EcoVadis, AVPQ pre-qualification, and Kununu Top Employer certifications.
STF operates as a B2B professional services firm with project-based, quote-driven pricing that is not publicly disclosed. Revenue is generated through long-term framework agreements and project engagements won through direct enterprise field sales, with dedicated account managers for key segments (municipal companies, telecommunications, digitalization, energy). Customers are segmented across eight verticals: telecommunications, real estate and construction, municipalities and public administration, digitalization/IT, technical building equipment, production and manufacturing, trade and logistics, and energy/health/public sector. Sales motion is exclusively direct; there are no resellers, marketplaces, or self-serve channels. Geographic coverage is delivered through the nationwide German office network, enabling field-engineering deployment across the country. The company is privately held with no external institutional investors and is currently investing in a new corporate campus in Senden-Bösensell targeting 2026 completion.
STF Group firmographics
Firmographics- Name
- STF Group
- Legal name
- STF Gruppe
- Website
- https://stf-gruppe.de
- Company type
- Private
- Founded year
- 1997
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- STF Group is a family-owned German engineering services firm with 600+ employees providing integrated telecommunications planning, digitalization, and technical building equipment services to enterprise and public-sector clients across Germany and Austria.
- Ownership category
- akta.pro rank
Where STF Group is headquartered
LocationHeadquarters
- HQ city
- Dülmen
- HQ country
- Germany
- HQ region
- Europe
Offices19 records
Markets served
STF Group business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Engineering and Consulting Services: STF Group generates revenue through the provision of specialized B2B engineering and consulting services across telecommunications infrastructure planning, digitalization, IT, and technical building equipment (TGA). Services span measurement and analysis, planning, construction supervision, integration, and commissioning. Engagements are project-based and long-term, serving enterprise and public-sector clients.
Go-to-market motion1 record
Distribution channels3 records
Marketing channels8 records
STF Group product offering
Product offeringCore offering
STF Group is a German engineering company that delivers integrated telecommunications, digitalization, and technical building equipment (TGA) planning services. Its portfolio spans mobile and fixed network planning (GSM, UMTS, LTE, 5G), broadband/fiber rollout, digital twin creation, 5G campus network planning, BOS object radio systems, WiFi planning, and full TGA engineering across all HOAI phases, delivered through three operating sub-brands: STF TeleConsult, STF ITech, and STF Energy.
Product overview
STF Group is an international engineering company offering a portfolio of specialized engineering services organized under three primary sub-brands: STF TeleConsult (telecommunications), STF ITech (digitalization and IT), and STF Energy (technical building equipment). The service portfolio spans mobile network planning and measurement (including the proprietary CELL Track measurement solution), digital twin creation, 5G campus network planning, WiFi planning, inhouse mobile coverage optimization, broadband/fiber consulting, BOS object radio systems, digital business model consulting, and TGA planning (HVAC, electrical, plumbing, fire protection, building automation). The company operates across eight industry verticals (real estate, municipalities, production/manufacturing, trade/logistics, telecommunications, energy, health, public sector) and delivers services from 19 German locations plus Austria.
Differentiator
Problem solved
Functional benefit
Brands
- STF Tele Consult: Telecommunications consulting and planning services subsidiary
- STF ITech
- STF Energy
Products and services
- STF TeleConsult (Telecommunications Engineering Services) Telecommunications engineering service line covering broadband/fiber optic planning, transmission technology and routing, mobile network planning across GSM, UMTS, LTE, and 5G, microwave links, WiFi planning, and BOS object radio services for telecom operators, public authorities, and enterprises.
- STF ITech (Digitalization Services) IT and digitalization service line offering digital twin creation, networking solutions, digital business model consulting, and 5G campus network planning for enterprises across real estate, manufacturing, healthcare, and public sector verticals.
- STF Energy (Technical Building Equipment Planning) Technical building equipment (TGA) planning service line covering HVAC (heating, ventilation, air conditioning), electrical, plumbing, fire protection, media technology, and building automation planning across all HOAI service phases, delivered as energy-efficient and sustainable solutions for new builds, renovations, and infrastructure projects.
- CELL Track Mobile Network Measurement Solution Proprietary mobile network measurement solution combining measurement hardware (stationary CELL Track hub for long-term monitoring and mobile CELL Track go for vehicle-mounted campaigns) with a GIS platform for identifying coverage gaps. Supports all mobile standards including 5G, with data hosted on DSGVO-compliant German servers, used by municipalities and telecom operators for systematic dead-zone detection.
- Digital Twin Services Digital twin creation service combining indoor 3D laser scanning and 360-degree photography with outdoor drone-based photogrammetry and mobile mapping systems for large-area road surveys. Outputs include BIM-compliant 3D models, point clouds, CAD as-built documentation, and cloud-based visualization platforms integrated with GIS (Scan2BIM, BIM2GIS).
- 5G Campus Network Planning End-to-end private 5G campus network planning service for industrial and enterprise sites, including Bundesnetzagentur frequency application support, infrastructure analysis, 3D visualization and simulation using iBwave and BIM/GIS tools, network deployment and commissioning, and ongoing operations and maintenance.
- Inhouse Mobile Coverage Services Indoor mobile coverage optimization service including consulting on mobile communications technologies, object-specific requirements analysis, indoor radio planning, implementation support, commissioning, and ongoing maintenance. Delivered jointly with Optimus Tower Austria for operator-independent in-building solutions.
- WiFi Planning Service Professional WiFi network planning service using 3D modeling and tool-supported radio coverage simulation for 2.4 GHz and 5 GHz bands, with capacity analysis for high-density areas, access point placement recommendations, equipment planning, and passive network cabling concepts.
- BOS Object Radio Planning Planning and commissioning of BOS (Behörden und Organisationen mit Sicherheitsaufgaben) digital radio systems for buildings and areas such as train stations, airports, stadiums, and shopping centers. Includes field measurements per GAN stages, 3D building modeling with radio propagation simulation, and acceptance testing with authorities.
- Broadband and Fiber Consulting Broadband and fiber optic consulting and planning service for telecommunications companies, energy providers, and public sector clients. Covers all project phases from initial consultation, FTTC/FTTH rollout planning, fiber network planning in commercial and residential areas, through construction supervision and acceptance testing.
- Digital Business Models Consulting Digitalization consulting service for developing digital business models, including visualization of existing processes, identification of digital transformation potentials, and implementation support through networking infrastructure and campus networks for enterprises.
Quantifiable outcome
- Energy savings of 282,000 kWh/year primary energy, five-figure annual cost reduction, and ~39 tonnes CO₂ reduction through energy optimization measures at Sportpark Senden.
- +2 more outcomes
Companies that use STF Group
Customer profileNamed customers24 records
Segments10 records
Ideal customer profiles5 records
STF Group technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
AI capability7 records
Feature6 records
STF Group partnerships and signals
Strategic signalPartnerships
14 partnerships are on record, tiered core, notable and minor.
- Optimus Tower AustriacoreSTF Group and Optimus Tower Austria have bundled their forces to offer a joint service for better mobile coverage in indoor spaces. The combined offering enables property owners and developers to access a carrier-independent, predictable, and managed indoor solution — from initial measurement through to maintenance. This partnership allows both companies to offer comprehensive in-building mobile solutions to the Austrian and German markets.
- KUCKERT ARCHITEKTEN BDAcoreSTF Group is collaborating with KUCKERT ARCHITEKTEN BDA on the design and planning of the STF Campus in Senden-Bösensell. The architecture firm led the conceptual design while STF's TGA subsidiary (STF Energy) handled technical building equipment planning. Silvia Maria Rojas, a certified DGNB auditor, is overseeing sustainability certification.
- BearingPointcoreSTF Tele Consult works alongside BearingPoint as a strategic controller, supporting the BDBOS (Bundesanstalt für Behörden und Organisationen mit Sicherheitsaufgaben) in the setup, operation, and ensuring the functionality of Germany's digital voice and data radio system for police, fire services, rescue services, THW, customs, and intelligence agencies. STF handles primarily technical tasks including evaluation of technical solutions, progress assessment, operational implementation support, and risk identification.
- Accenture (Innovation Hub)notableSTF Group created a comprehensive Digital Twin for the Accenture Innovation Hub located on the UNESCO World Heritage site of Zeche Zollverein in Essen. The project involved laser scanning, BIM modeling, and GIS integration to create a precise, georeferenced digital representation of the existing building structure for use in future planning and documentation processes.
- Lindner Lohse ArchitektenminorSTF Group collaborated with Lindner Lohse Architekten on the planning and construction supervision of a photovoltaic system for the Agentur für Arbeit Ahlen. The architecture firm was the primary designer while STF handled the technical engineering and project management.
- Deutsche Telekom AGcoreSTF Group supports Deutsche Telekom nationwide in broadband expansion, including fiber network planning in commercial areas, municipalities, and new construction zones. The partnership encompasses regular business (FTTC/FTTH rollout) as well as special projects including TVUM, transmission routes, and MBfM programs.
- Vodafone GmbHcoreSTF Group is a long-term and reliable partner of Vodafone in network development, providing services in nationwide network expansion including radio network and backbone planning, network optimization, and special projects such as in-building network construction. Joint projects include the Digital Twin of the Vodafone Future Floor.
- 1&1 VersatelcoreSTF Group supports 1&1 Versatel in the realization of customer connections and fiber planning, serving as an end-to-end partner for both the customer and the network operator. Services include order processing, on-site visits, documentation, construction management, transmission route planning, hardware upgrades, network configuration, and KPI verification.
- NetCom BWcoreFor the regional network operator NetCom BW, STF Tele Consult plans and implements the broadband telecommunications network expansion in administrative districts and municipalities in Baden-Württemberg. More than 120 municipalities have already been supplied.
- EricssonnotableSTF Group supports Ericsson in network optimization by decommissioning legacy technology including radio relay, ATM, and multiplexer systems in operator networks. STF manages planning coordination for turn-key projects.
- Deutsche Gesellschaft für Nachhaltiges Bauen (DGNB)notableSTF Campus is pursuing DGNB (German Society for Sustainable Building) certification. The audit process is being overseen by certified DGNB auditor Silvia Maria Rojas, who is part of the STF team. The DGNB certification covers the entire process from planning through to final award of the certificate.
- EvoniknotableSTF Group planned a 5G network for Evonik, creating a 3D model to capture the current state for performing various calculations and simulations to optimize 5G coverage planning.
- RemondisminorRemondis collaborated with STF Group on the CELL Track (EchtNetz-Box) mobile coverage measurement project in the city of Netphen. Remondis vehicles were equipped with the measurement boxes, driving through the city for six months to collect coverage data.
- Sparkasse / Volksbank / IHK / WfC (regional partners)minorRegional financial institutions and economic development organizations attended the symbolic groundbreaking ceremony for the STF Campus in Senden-Bösensell, indicating active engagement with regional business networks.
Scale indicators5 records
Recent moves7 records
Expansion highlights6 records
STF Group competitors and assessment
Company assessmentDirect peers
- Drees & Sommer: Stuttgart-based engineering consultancy with 5,000+ employees offering integrated real estate, infrastructure, and digitalization services across Germany. Highly comparable to STF Group in combining TGA planning, digital twin/BIM, and sustainability consulting for real estate and public-sector clients, but at significantly larger scale.
- Vössing Ingenieure: Munich-based German engineering firm specializing in infrastructure planning including transport, energy, and telecommunications networks. Direct competitor in telecom infrastructure planning with comparable headcount and German-market focus.
- Obermeyer Planen + Beraten: Munich-headquartered German engineering consultancy (1,000+ employees) covering transport infrastructure, buildings, energy, and environment. Comparable as a multi-disciplinary German engineering firm with both building services and infrastructure planning capabilities.
- Circet: Paris-based European leader in telecom infrastructure services (15,000+ employees) operating fiber rollouts, mobile network deployment, and in-building coverage across multiple European markets. Direct peer to STF in telecom field engineering services for operators, with comparable customer base.
Broad incumbents
- AFRY: Stockholm-headquartered European engineering consultancy (19,000+ employees) formed from ÅF and Pöyry, operating across infrastructure, energy, and digitalization. Overlaps with STF in telecom infrastructure planning, energy, and digital twin work, but at vastly larger scale and broader geographic footprint.
- Sweco: Stockholm-listed European engineering consultancy (22,000+ employees) with strong presence in Germany, the Netherlands, and Nordics. Comparable to STF in offering integrated engineering across infrastructure, buildings, and digitalization, but operates at European scale.
- Arcadis: Amsterdam-based global design and engineering consultancy (36,000+ employees) covering buildings, infrastructure, water, and environment. Overlaps with STF in TGA-adjacent building services, infrastructure planning, and digital twin consulting, with much broader geographic and service scope.
- Buro Happold: UK-headquartered international engineering consultancy (2,000+ employees) covering buildings, infrastructure, and digital advisory. Comparable in providing interdisciplinary engineering across telecom, smart building, and digital twin domains, though more focused on buildings and sustainability than telecom.
Emerging players
- Thinkproject: Munich-based SaaS platform (EQT portfolio company) providing BIM, digital twin, and construction collaboration software. Tangentially comparable as a German-headquartered digital twin and BIM provider serving overlapping AEC customers, though product-led rather than services-led.
- Comsof: Belgian software company specializing in fiber network planning and design automation (FiberPlanIT). Tangentially comparable as a fiber rollout planning technology peer to STF TeleConsult's broadband/fiber planning services, though software-focused rather than services-focused.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks5 records
Key highlights7 records
Customer concentration
STF Group social profiles
Digital presenceSTF Group compliance and trust
Trust signalCompliance6 records
STF Group financial estimates
Financial estimateRevenue estimate
Valuation estimate
STF Group leadership team
Management profileNumber of profiles
Profiles13 records
STF Group subsidiaries and ownership
Company hierarchySubsidiaries4 records
STF Group funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
STF Group M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about STF Group
What does STF Group do?
STF Group is a German engineering company that delivers integrated telecommunications, digitalization, and technical building equipment (TGA) planning services. Its portfolio spans mobile and fixed network planning (GSM, UMTS, LTE, 5G), broadband/fiber rollout, digital twin creation, 5G campus network planning, BOS object radio systems, WiFi planning, and full TGA engineering across all HOAI phases, delivered through three operating sub-brands: STF TeleConsult, STF ITech, and STF Energy.
Is STF Group a public or private company?
STF Group is a private company. It is classified as family owned and is currently operating.
When was STF Group founded?
STF Group was founded in 1997. It employs 501 to 1,000 people.
Where is STF Group based?
STF Group is headquartered in Dülmen, Germany, in the Europe region.
How does STF Group make money?
One revenue line is on record: engineering and Consulting Services.
Who are STF Group's main competitors?
Direct peers on record are Drees & Sommer, Vössing Ingenieure, Obermeyer Planen + Beraten and Circet. Broad incumbents are AFRY, Sweco, Arcadis and Buro Happold. Emerging players are Thinkproject and Comsof.
Does STF Group have an API?
No public API is recorded for STF Group.