What OHES Environmental does

OHES Environmental Ltd is a UK and Ireland-based environmental consultancy, founded in 2002 and operating as a wholly-owned subsidiary of the Adler & Allan Group. The firm provides specialist environmental response, investigation, and remediation services across four primary verticals: insurance (loss adjusters and claims management), utilities (water companies, power generation, fuel providers), transport/manufacturing/chemicals (rail, ports, manufacturing, airports), and construction/infrastructure (developers, due diligence, biodiversity net gain). Core revenue lines are professional services across land transaction due diligence, environmental risk management, ecology, environmental permitting, water quality monitoring, sustainability/Net-Zero strategy, chemical compliance advisory, and incident management. The 24/7 emergency spill response service — covering oil, chemical, biological, sewage, floodwater, firewater, and other pollutants — is the operational backbone, with a stated network of 150 qualified consultants, former-regulator staff, and sub-3-hour average arrival time.

The underlying technology stack is domain-led rather than software-led. Consultants apply the Source–Pathway–Receptor pollutant linkage model; specialised remediation techniques include hydrogen peroxide dosing and mechanical aeration (venturi, splash, compressor-based bubble) for oxygenating polluted watercourses, with in-house ecologists monitoring oxygen and hydrogen peroxide levels. The company holds UKSpill and ISAS spill response accreditation, ISO 9001/14001/18001 certifications, and supplier pre-qualifications (Constructionline, Achilles UVDB, Altius, Gas Safe), and was voted Best Inland and Marine Responders 2022 by the UK & Ireland Spill Association. No software products, APIs, or AI/ML capabilities are disclosed in source materials.

Commercial model is professional services billing on a quote/project basis, supplemented by subscription-style arrangements including the Response Plus contracted emergency response programme (annual contract with preferential rates) and 24/7 contracted chemical advice retainers with bespoke call-handling protocols. Chemical hazard training (CLP, DGSA, ADR) is delivered on a pay-as-you-go basis at client premises or three UK training facilities. Customer concentration is diversified across enterprise buyers (Environment Agency, insurers, water utilities, power generators, fuel distributors, developers), and go-to-market is direct enterprise sales with sector-specific product bundles and parent-group cross-referrals via Adler & Allan.

Name

OHES Environmental

Legal name

OHES Environmental Ltd

Website

https://ohes.co.uk

Company type

Private

Founded year

2002

Operating status

Operating

Short description

OHES Environmental is a UK and Ireland environmental consultancy and Adler & Allan Group subsidiary providing 24/7 spill response, environmental claims management, ecology, permitting, and sustainability advisory services to insurers, utilities, transport, chemical, and construction clients.

Ownership category

akta.pro rank

Product category

Environmental Consulting Services

NAICS

Environmental Consulting Services (541620), Remediation and Other Waste Management Services (5629)

SIC

Hazardous Waste Management (4955)

akta.pro primary industry

Environmental Compliance & Permitting (BPAHAJAA)

akta.pro secondary industries

Emergency Response, Spill Prevention & Crisis Preparedness (BPAHAJAM), Water, Wastewater & Stormwater Compliance (BPAHAJAJ), EHS Auditing, Inspections & Assurance (BPAHAJAG)

Keywords

• Environmental consulting services
• Emergency spill response
• Water quality monitoring
• Ecological surveys
• Chemical compliance training

Headquarters

HQ city

Wokingham

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Environmental Consultancy Services: Professional consulting services for environmental risk management, site investigation, remediation strategy, and regulatory compliance. Services provided to insurers, loss adjusters, property developers, and industrial operators.
2. 24/7 Emergency Spill Response: Round-the-clock emergency response services for pollution incidents including oil, chemical, sewage, and other hazardous material spills. Response Plus contracted services with preferential rates and priority response.
3. Training Services: Specialist training programs including chemical hazard awareness, CLP training, and Dangerous Goods Safety Adviser (DGSA) certification. Delivered at client premises or at three training facilities across the UK.
4. Contracted Chemical Advice: 24/7 contracted specialist chemical advice service on annual subscription basis. Includes tailored call handling protocol, emergency response coordination, and compliance advisory for ADR, REACH, and other regulations.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels5 records

Core offering

OHES Environmental provides environmental consulting and 24/7-365 emergency spill response across the UK and Ireland. Core offerings include environmental risk management, environmental claims handling for insurers, ecology and biodiversity services, water quality monitoring, environmental permitting, chemical compliance advisory and training, sustainability/Net-Zero strategy, and rapid incident management for oil, chemical, biological, sewage, floodwater and firewater pollution events.

Product overview

OHES Environmental is an environmental consulting firm and part of the Adler & Allan Group, offering a comprehensive portfolio of professional services rather than a unified software product. The core service lines include Land Transaction and Development (environmental due diligence, geoenvironmental assessments, biodiversity net gain), Environmental Risk Management (risk audits and site assessments), Environmental Claims (insurance claims management for property, motor, agricultural, liability, and major losses), Environmental Permitting (permit compliance and water quality testing), Water Quality Monitoring (catchment studies and discharge monitoring), Ecology (aquatic and terrestrial ecology, protected species surveys, habitat restoration), Sustainability and Net-Zero (carbon footprinting, Net-Zero strategies, ESG reporting, blue carbon projects), Chemical Compliance and Training (ADR, CLP, REACH, DGSA), and Incident Management (24/7 emergency response for oil, chemical, biological, floodwater, sewage, and firewater incidents). Named products such as 123 Spill Response, Spill Protect, EnviroConstruct, and Dangerous Goods Solutions represent specific bundled offerings within this service portfolio.

Differentiator

Problem solved

Functional benefit

Products and services

• Land Transaction and Development Environmental consulting services helping investors, owners, operators, and developers understand, manage, and reduce geoenvironmental and environmental risks in land transactions and development projects, including environmental due diligence, geoenvironmental assessment and biodiversity net gain.
• Environmental Risk Management Risk assessment and management consulting using qualitative and quantitative risk matrices and audits to help organisations understand and reduce environmental risks on their sites.
• Environmental Claims Environmental insurance claims management service supporting loss adjusters and insurance partners through response, site investigation, and remediation across property, motor, agricultural, liability, and major complex loss claims.
• Environmental Permitting
• Water Quality Monitoring
• Ecology
• Sustainability and Net-Zero
• Chemical Compliance and Training
• Incident Management
• 123 Spill Response
• Response Plus Contract
• Contracted Chemical Advice Service
• EnviroConstruct
• Dangerous Goods Solutions

Quantifiable outcome

• 15,000+ incidents managed with no clients prosecuted for causing pollution where OHES managed the initial response
• +3 more outcomes

Named customers8 records

Segments6 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Adler & Allan GroupcoreStrategic or Co-development PartnerOHES is part of the Adler & Allan Group of companies. This parent company provides environmental services across utilities, energy, and industrial infrastructure to reduce risk to the environment, people, and organisations, and prepare for a net-zero future. The national network of consultants, engineers and specialists makes Adler & Allan the first-choice environmental partner to expertly manage assets through the full life cycle, including design, installation, preventive maintenance, transition, or decommission. OHES benefits from access to over 100 products and services ready to deploy for clients in 50+ industries.

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• RSK Group: UK-headquartered environmental, engineering and technical services group offering site investigation, contaminated land, ecology, water and EHS consulting. Highly comparable in service mix to OHES, operating at significantly larger scale and providing a useful valuation and benchmark reference.
• Wardell Armstrong: UK-based environmental, geotechnical and engineering consultancy providing land contamination, permitting, ecology and mining-related environmental services. Closely comparable to OHES in service mix and mid-market UK enterprise customer focus.
• SLR Consulting: Global environmental and advisory consultancy with a strong UK practice spanning environmental due diligence, impact assessment, permitting and ecology. Directly comparable in offering breadth and target customer base to OHES, particularly in land/development and industrial compliance.
• Hydrock (now part of Stantec): UK-based environmental, geotechnical and building performance consultancy with extensive overlap in contaminated land, ecology, permitting and ESG advisory. Recent acquisition by Stantec illustrates the consolidation dynamic and provides a recent transaction benchmark for UK environmental consultancies of OHES's size.

Broad incumbents

• Arcadis UK: Global design and consultancy firm with a UK environmental practice addressing site investigation, remediation, water and climate resilience. Competes for many of the same enterprise and infrastructure clients as OHES but as part of a much broader portfolio.
• Tetra Tech UK: International consulting and engineering firm with UK environmental services focused on water, waste and sustainable infrastructure. Competes with OHES in water-quality and environmental compliance work but does not focus on emergency spill response.
• WSP Environment (UK): Global professional services firm with a sizeable UK environmental consultancy practice covering EIA, permitting, water and contaminated land. Competes with OHES on larger multi-disciplinary mandates but does not specialize in emergency spill response.
• AECOM UK Environment: Global infrastructure consultancy with substantial UK environmental services in EIA, water, ecology and ESG. Overlaps with OHES in regulated environmental consulting but operates at materially larger scale and broader geographic scope.

Others

• Adler & Allan Group: Parent company of OHES providing broader environmental services (tank installation, line stopping, civil engineering, decommissioning) across 50+ industries. Not a direct competitor but the platform that determines OHES's strategic direction and provides cross-sell and capability leverage.
• Veolia UK: UK arm of global environmental services group providing water, waste and industrial cleaning services including hazardous spill response. Comparable in incident response and water services capabilities, but primarily a waste/water operator rather than a consultancy.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/ohes-environmental

Revenue estimate

Valuation estimate

Number of profiles

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 OHES Environmental