WJ Groundwater

What WJ Groundwater does

WJ Groundwater (also trading as WJ UK and WJ Group) is a privately held specialist water management contractor founded in 1981 and headquartered in Kings Langley, United Kingdom. The company provides an integrated suite of services across the groundwater lifecycle — dewatering and groundwater control (deepwell, wellpoint, ejector, passive relief, and sump pump systems), real-time monitoring and environmental services, pumping and thermal response tests, water treatment (biological, chemical, and physical), well drilling up to 200m depth, and ground source heating/cooling systems. These are supported by in-house numerical groundwater modelling using SEEP/W 3D, Aquifer Win 32, and Pipe Flow Expert, and a custom cloud-based monitoring portal that manages over 428 active borehole and surface water monitoring locations on HS2 alone.

The company serves major infrastructure and construction clients on a project basis, including HS2 Ltd and all four of its main construction joint ventures (Balfour Beatty VINCI, EKFB, Skanska Costain Strabag, Align), Sizewell C Limited, Riverlinx (Silvertown Crossing), SOCOTEC/Perfect Circle (Lower Thames Crossing), NHS Trusts, Southern Water, and international clients such as SK Ecoplant in South Korea and Acciona/EE+I JV in the Philippines. Sectors served include railways, nuclear and power, utilities, airports (London Heathrow, Dubai, Hamad), ports and marine, tunnels and shafts, basements and deep excavations, and water supply. The business is differentiated by 4,000+ completed projects across 18 countries, a 130+ year combined-expertise in-house design team, 35+ published technical papers, and proprietary emissions-free drilling technology (the BDA Innovation Award-winning Comacchio MC6).

WJ generates revenue through project-based professional services contracts, quoted on a project-by-project basis depending on scope, complexity, and duration, typically structured as multi-year engagements tied to the construction phase of major infrastructure programmes. It reaches customers through direct enterprise field sales, tendering on major project packages, and partnerships with main contractors and joint ventures. The company maintains permanent offices across the United Kingdom, Poland, Canada (Toronto and Vancouver), the Philippines, the United Arab Emirates (Dubai and Abu Dhabi), Saudi Arabia, and Qatar, and operates in 12 countries globally.

Name

WJ Groundwater

Legal name

WJ UK

Website

https://wjgl.com

Company type

Private

Founded year

1981

Operating status

Operating

Headcount range

101–250 employees

Short description

WJ Groundwater is a UK-based specialist water management contractor founded in 1981 that provides dewatering, groundwater monitoring, water treatment, well drilling, and ground source energy services to major rail, nuclear, utilities, and infrastructure clients across 12 countries.

Ownership category

akta.pro rank

Product category

Groundwater Management Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623), Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Dewatering & Groundwater Control (Wellpoints, Deep Wells, Cutoff Systems) (IMAFAOAF)

akta.pro secondary industries

Dewatering, Groundwater Control & Construction Hydrogeology (EUAHAFAG), Groundwater Extraction, Treatment & Discharge (Pump-and-Treat, reinjection) (BPALAKAF)

Keywords

• Groundwater management services
• Construction dewatering services
• Hydrogeological engineering services
• Well drilling contracting
• Groundwater monitoring solutions

Headquarters

HQ city

Kings Langley

HQ country

United Kingdom

HQ region

Europe

Offices9 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. Groundwater Management and Dewatering Services: Project-based services providing groundwater control and dewatering systems for construction projects including design, installation, and maintenance. Revenue is generated through contracts with construction companies, infrastructure developers, and government agencies on major projects.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

WJ Groundwater is a specialist water management contractor providing design, installation, operation, and maintenance services for groundwater control, dewatering, pumping tests, water treatment, well drilling, and ground source energy systems. The company delivers tailored solutions to major construction and infrastructure projects, combining scientific hydrogeological expertise with on-site execution across more than 18 countries.

Product overview

WJ Groundwater offers a unified suite of water management services rather than a software platform. The core portfolio consists of six integrated service lines: Dewatering & Groundwater Control (deepwell systems, wellpoints, ejectors, passive relief), Monitoring & Environmental Services (real-time instrumentation, cloud-based data portals), Pumping Tests (step tests, constant rate tests, thermal response tests), Water Treatment (biological, chemical, and physical remediation), Well Drilling (up to 200m depth), and Ground Source Energy Systems (open-loop geothermal). These services are delivered as an integrated offering with bespoke numerical groundwater modelling (SEEP/W 3D, Aquifer Win 32, Pipe Flow Expert) supporting design and optimization across all service lines.

Differentiator

Problem solved

Functional benefit

Products and services

• Dewatering & Groundwater Control Provides comprehensive dewatering systems and groundwater management to enable construction of structures below groundwater levels, including deepwell systems, wellpoint systems, ejector systems, passive relief systems, and sump pump systems for construction and infrastructure clients.
• Monitoring & Environmental Services

Quantifiable outcome

• Over 20 million litres of water removed successfully at Sizewell C MCA
• +6 more outcomes

Named customers12 records

Segments9 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Nine partnerships are on record, tiered strategic and core.

• Acciona and EE+I JVstrategicImplementation/ SI/ Consulting Partner · 1 April 2021Principal contractor for Clark-Malolos Railway Station project in Philippines. WJ's prior experience working with Acciona on Dubai Expo 2020 Metro Extension was key factor in securing this USD $6 million contract.
• HS2 LtdcoreStrategic or Co-development PartnerMajor strategic engagement providing water management solutions across all HS2 construction phases. WJ contracted by all of HS2's construction partners (Balfour Beatty VINCI, Skanska Costain Strabag, Align JV, EKFB) providing services at 37 work sites with 29 contract packages delivered.
• Balfour Beatty VINCI (BBV)coreImplementation/ SI/ Consulting PartnerHS2 construction joint venture for whom WJ provides groundwater control and dewatering services including Bromford Tunnel West Portal, Bromford Tunnel East Portal, and Water Orton Cutting projects.
• Skanska Costain Strabag (SCS JV)coreImplementation/ SI/ Consulting PartnerHS2 construction JV for whom WJ provides Northolt Tunnel dewatering services including shafts and cross passages projects.
• Eiffage, Kier, Ferrovial Construction, and BAM Nuttall (EKFB)coreImplementation/ SI/ Consulting PartnerHS2 C2-C3 section JV for whom WJ provides comprehensive groundwater and surface water monitoring programme managing 428+ monitoring locations.
• Sizewell C LimitedcoreStrategic or Co-development PartnerNew nuclear power station project where WJ provides specialist hydrogeological services including investigations, resource assessments, and water management planning.
• SK EcoplantstrategicImplementation/ SI/ Consulting PartnerSouth Korean engineering and construction company engaged WJ for Bujeon-Masan Railway Project dewatering. Previously worked with SK on Dubai Expo 2020 Metro Extension.
• Riverlinx (Bam Nuttall, Ferrovial, SK Ecoplant JV)strategicImplementation/ SI/ Consulting PartnerSilvertown Crossing Tunnel project where WJ undertook pumping tests and dewatering for both northern and southern tunnel portals.
• SOCOTEC / Perfect Circle JVstrategicImplementation/ SI/ Consulting PartnerLower Thames Crossing project JV for whom WJ provided drilling, hydrogeological testing, and monitoring expertise.

Scale indicators14 records

Recent moves3 records

Expansion highlights6 records

Broad incumbents

• SOCOTEC UK: SOCOTEC is a major TIC (testing, inspection, certification) and environmental services firm offering site investigation, monitoring and compliance services. It partners with and competes against WJ on infrastructure projects such as the Lower Thames Crossing.
• Stantec: Stantec is a global engineering and consulting firm with strong environmental and hydrogeology capabilities. It frequently competes with WJ for hydrogeological assessment and design work on major UK infrastructure projects.

Direct peers

• Keller Group: Keller is a global geotechnical specialist contractor offering ground improvement, piling and dewatering services. It is the most direct large-scale competitor to WJ's dewatering and groundwater control offerings, serving similar infrastructure and construction clients across multiple geographies.
• Balfour Beatty Ground Engineering: Balfour Beatty's Ground Engineering division delivers piling, foundations, ground improvement and dewatering services with in-house design capability. It is one of WJ's closest competitors on UK-based infrastructure and construction projects.
• Bachy Soletanche: Bachy Soletanche (Soletanche Bachy) is a leading global foundation and ground engineering contractor providing piling, diaphragm walls and dewatering solutions. It frequently competes with WJ on UK and international infrastructure tenders including HS2-related works.
• QPD Dewatering: QPD is a UK specialist pump and dewatering hire contractor providing wellpoint and deep well systems for construction sites. It is a focused direct competitor in the project dewatering service line WJ also serves.
• Roger Bullivant: Roger Bullivant is a UK piling and ground engineering contractor offering foundation solutions including some dewatering and ground water management services on smaller-scale and residential schemes.
• Fugro: Fugro is a global geo-data specialist providing site investigation, hydrogeological surveys and geotechnical services. It overlaps with WJ's testing and monitoring service lines and is an active site investigation partner on the same projects.
• Cementation (Skanska): Cementation, part of Skanska, is a major UK foundation and piling contractor with adjacent dewatering and ground water management capabilities. It competes directly with WJ for specialist sub-contracts on major UK infrastructure projects.
• Van Elle: Van Elle is a UK ground engineering contractor offering piling, foundations and ground stabilisation services with similar exposure to UK infrastructure and housebuilding markets as WJ.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInuk.linkedin.com/company/wjuk
• Xx.com/wjgroundwateruk

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries1 record

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 WJ Groundwater