What Siers Groep does

Siers Groep is a privately held, family-owned Dutch infrastructure services company headquartered in Oldenzaal, Netherlands, founded in 1964 by Herman Siers. The company delivers end-to-end underground infrastructure services — colloquially termed its 'Totaalontzorger' (Total Care Provider) model — across seven disciplines: Elektra, Water, Telecom, Infraconsult, Bliksem + Aarding (lightning and grounding), Koude + Warmte (district heating and cooling), and Engineering. Its engineering toolkit rests on standard industry software (AutoCAD, ArcGIS, Civil 3D) rather than proprietary platforms; its operational differentiation is the Buurtaanpak (neighborhood approach) methodology, which coordinates multiple underground infrastructure upgrades simultaneously to minimize repeat streetworks.

The company serves Dutch grid operators (netbeheerders) — Alliander, Stedin, and Liander — as anchor customers on multi-year grid-reinforcement programs, alongside water utilities (e.g., Evides), municipalities, telecom operators, and industrial clients served via the PrivatiS subsidiary. PrivatiS manages approximately 100 medium-voltage installations nationwide for industrial customers, solar parks, energy storage, and EV fast-charging infrastructure. Siers maintains eight regional offices across the Netherlands and one German subsidiary (Siers GmbH, Emsbüren).

Revenue is generated through project-based and contract-based B2B pricing negotiated directly with utilities, water boards, and government entities, primarily through competitive tenders or direct award. With 501–1,000 employees, the company is family-controlled with no external parent, no funding rounds, and no publicly disclosed revenue. Recent strategic activity includes the 2025 Deventer office/warehouse consolidation and the appointment of former Dutch Minister Bruno Bruins to the Supervisory Board.

Name

Siers Groep

Legal name

Siers Groep Oldenzaal B.V.

Website

https://siersgroep.nl

Company type

Private

Founded year

1964

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Siers Groep is a family-owned Dutch underground infrastructure services company delivering end-to-end design, engineering, installation, and maintenance across electricity, water, telecom, and district heating networks for grid operators, water utilities, municipalities, and industrial clients in the Netherlands and Germany.

Ownership category

akta.pro rank

Product category

Underground Infrastructure Services

NAICS

Electric Power Distribution (221122), Water, Sewage and Other Systems (2213), Steam and Air-Conditioning Supply (221330)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623)

akta.pro primary industry

Undergrounding & Strategic Hardening (Selective Conversion, Duct Banks) (EUADAHAE)

akta.pro secondary industry

Transmission Reliability, Resilience & Emergency Restoration (NERC/ENTSO-E Compliance) (EUADAAAO)

Keywords

• Underground infrastructure services
• Electrical grid construction
• Water pipeline installation
• Telecom network construction
• Infrastructure consulting

Headquarters

HQ city

Oldenzaal

HQ country

Netherlands

HQ region

Europe

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Infrastructure Project Services: Siers Groep generates revenue through large-scale infrastructure projects for utilities and governments. Services span from advisory and engineering through to execution, maintenance, and management of underground infrastructure. Projects are delivered under contracts with grid operators and public authorities, typically through competitive tendering or direct awarded contracts.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels5 records

Core offering

Siers Groep delivers end-to-end underground infrastructure services across seven disciplines (Elektra, Water, Telecom, Infraconsult, Bliksem + Aarding, Koude + Warmte, and Engineering). Services span advisory, design, engineering, installation, maintenance, and management of underground electricity, water, telecom, heat/cold, and lightning protection networks for utility operators, water boards, municipalities, and industrial clients. The Totaalontzorger (Total Care Provider) model integrates all disciplines to deliver complete project lifecycle ownership.

Product overview

Siers Groep is a family-owned Dutch infrastructure services company founded in 1964, operating as a single unified service provider rather than a platform-plus-modules architecture. The company delivers essential underground infrastructure services across seven core disciplines: Elektra (electricity), Water, Telecom, Infraconsult, Bliksem + Aarding (lightning and grounding), Koude + Warmte (district heating/cooling), and Engineering. The Totaalontzorger (Total Care Provider) service integrates these disciplines end-to-end from advisory and design through execution, maintenance, and management. PrivatiS operates as a subsidiary sub-brand focused on the privatized medium and high voltage segment, managing approximately 100 installations nationwide and offering services for large-scale energy storage and fast charging facilities.

Differentiator

Problem solved

Functional benefit

Brands

• Privatis: A subsidiary specializing in medium and high voltage electrical installations for industry and energy clients, including design, realization and management of electro-technical installations and systems.

Products and services

• Elektra (Electricity Infrastructure)

Quantifiable outcome

• NuMeren program: 10-40 km of medium-voltage cables per project over 6-12 years on the Veluwe
• +1 more outcomes

Named customers5 records

Segments6 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Four partnerships are on record, tiered core.

• AlliandercoreStrategic or Co-development PartnerSiers Groep collaborates with Alliander on the NuMeren program, a 6-12 year initiative to resolve medium-voltage network bottlenecks and make the energy network on the Veluwe future-proof. Siers handles project execution including laying medium-voltage cables (10-40 km per project) and installing or replacing cables, substations, and distribution stations.
• LiandercoreStrategic or Co-development PartnerSiers works with Liander on design & construct projects for medium-voltage network expansion on the Veluwe, operating in a joint construction team where Siers and Liander are responsible for different design phases (VO, DO, and UO).
• StedincoreStrategic or Co-development PartnerSiers collaborates with grid operator Stedin on the Buurtaanpak (neighborhood approach) program to make the electricity grid neighborhood-by-neighborhood future-proof by laying heavier cables and replacing or adding transformer stations.
• PrivatiScoreStrategic or Co-development PartnerPrivatiS is a wholly-owned subsidiary of Siers Groep, specialized in the privatized portion of medium and high voltage networks. PrivatiS operates independently as the interface where utility operator responsibilities end and private infrastructure management begins, serving industrial clients, solar parks, and energy storage systems.

Scale indicators4 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Heijmans: Heijmans is a major Dutch construction and infrastructure company with significant utility, civil and building capabilities — competing for the same Dutch public and private infrastructure tenders as Siers, but with broader scope.
• Koninklijke VolkerWessels: VolkerWessels is one of the largest Dutch construction and infrastructure groups, with subsidiaries in cable/pipeline work, civil engineering and energy — a broader incumbent that competes for grid reinforcement and underground utility tenders.
• Royal BAM Group: Royal BAM is a leading European construction and engineering group that bids on Dutch utility, civil and infrastructure projects, often competing with Siers in underground works as part of broader project packages.
• TBI Holdings: TBI is a Dutch portfolio of technical services and construction firms (including Croonwolter&dros) delivering multi-disciplinary building, infrastructure and energy services — overlapping with Siers in utility-side engineering and execution.
• Dura Vermeer: Dura Vermeer is a Dutch family-owned construction and infrastructure company active in civil works, utilities and energy — competing with Siers on Dutch public infrastructure tenders from a broader scope.
• Strukton: Strukton is a Dutch infrastructure group active in rail, civil, mobility and energy networks including underground cable work — competing for Dutch energy-transition and utility infrastructure projects from a broader position.

Direct peers

• Mourik: Mourik is a Dutch industrial services and infrastructure contractor with strong presence in mechanical, pipeline and electrotechnical projects, overlapping with Siers in energy and industrial installation work.
• A.Hak: A.Hak is a Dutch family-owned contractor specialized in underground infrastructure for energy, water and telecom — directly competing with Siers on cable and pipeline laying projects for Dutch grid operators and water utilities.
• Hanab (formerly Visser & Smit Hanab): Hanab is one of the largest Dutch pipeline and cable infrastructure contractors, building underground networks for electricity, gas, water, telecom and district heating — head-to-head with Siers' seven-discipline offering.

Regional players

• Denys: Denys is a Belgian-headquartered international contractor active in pipelines, underground infrastructure and energy projects — a strong regional peer across the Benelux, with comparable underground engineering capabilities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/Siersgroep
• Facebookfacebook.com/Siersgroep

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries8 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 Siers Groep