What Denholm Environmental does

Denholm Environmental is a UK-based specialist industrial services provider delivering cleaning, decontamination, and waste management solutions to enterprise clients in oil and gas, petrochemicals, marine, utilities, and manufacturing. The company was formed on 1 October 2021 through the merger of Hazco Environmental into Denholm MacNamee, and operates as a subsidiary of the Denholm Energy Services conglomerate, with its head office in Inverurie, Scotland. Service delivery spans onshore and offshore environments across the UK, Norway, West Africa, and South America, with documented execution on 36 platforms, 28 FPSOs, and 22 refineries and terminals.

The company's technology platform centres on one of the largest HP/UHP water jetting fleets in Western Europe (40 pumps acquired over the past decade, operating up to 60,000 psi), the proprietary Premier Transfer System (PTS) for deep vertical waste removal in FPSO cargo and slop tanks (100% project success rate, 55m vertical transfer), and an exclusive UK license for Zyme-Flow hydrocarbon decontamination chemistry that enables vessel entry in 8-12 hours. Equipment is certified to ATEX, NORSOK, and DNV 2.7-1 standards, and the workforce is uniformly Radiation Protection Supervisor trained, supporting NORM decontamination work alongside dry ice cleaning, DISAB material handling, and crude oil storage tank cleaning up to 108m diameter.

Revenue is generated through project-based professional services contracts (turnaround and shutdown delivery), equipment hire of the specialised fleet, and liquid waste management services using vacuum and liquid ring tankers. Pricing is quote-based and project-specific, with no standard published tiers. The go-to-market motion is direct enterprise sales, with work secured through competitive tendering and established relationships with major oil and gas operators, FPSO owners, and refinery and terminal operators.

Name

Denholm Environmental

Legal name

Denholm Environmental Limited

Website

https://denholm-enviro.com

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

101–250 employees

Short description

Denholm Environmental is a UK-based specialist industrial services subsidiary of Denholm Energy Services, delivering HP/UHP water jetting, chemical decontamination, tank cleaning, and waste management to enterprise clients in oil and gas, petrochemicals, marine, and utilities across the UK, Norway, West Africa, and South America.

Ownership category

akta.pro rank

Product category

Industrial Cleaning & Environmental Services

NAICS

Waste Treatment and Disposal (56221), Waste Collection (5621), Remediation and Other Waste Management Services (5629), Hazardous Waste Treatment and Disposal (562211)

SIC

Sanitary Services (4950), Refuse Systems (4953), Hazardous Waste Management (4955), Oil & Gas Field Machinery & Equipment (3533)

akta.pro primary industry

Subtitle: Waste Treatment & Disposal — Sub-industries (L4) (EUAIACAA)

akta.pro secondary industry

Industrial Cleaning & Environmental Equipment Rental/Leasing (Vacuum Trucks, Dust Control, Dehumidifiers) (TLABAFAK)

Keywords

• Industrial cleaning services
• Liquid waste management
• Water jetting services
• Oilfield services
• Equipment hire

Headquarters

HQ city

Inverurie

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Industrial Services Projects: Project-based professional services delivering specialist industrial cleaning, decontamination, and waste management solutions to enterprise clients in oil & gas, petrochemicals, and energy sectors. Revenue generated through contracted project work both onshore and offshore.
2. Equipment Hire: Rental of specialized industrial equipment including HP/UHP jetting units, vacuum units, tank cleaning systems, and accessories. Equipment available for hire with operator support where required.
3. Liquid Waste Management Services: Collection, transportation, and disposal of hazardous and non-hazardous liquid waste streams using fleet of vacuum and liquid ring tankers. Includes drum, IBC, and packaged waste collection services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Denholm Environmental is a UK-based provider of specialist industrial services and liquid waste management, operating as a subsidiary of Denholm Energy Services. The company delivers high-pressure and ultra-high-pressure water jetting, vacuum transfer, tank and vessel cleaning, hazardous waste recovery, and complementary equipment hire for industrial and oilfield clients. Its service portfolio spans industrial cleaning, decontamination, and waste handling for sites such as refineries, petrochemical plants, and energy infrastructure.

Product overview

Denholm Environmental is a specialist industrial services provider offering an integrated portfolio of cleaning, decontamination, and waste management solutions for oil and gas, petrochemical, and industrial sectors. The company operates across onshore and offshore environments with a comprehensive equipment fleet. The core offerings include Oilfield Services (chemical decontamination via Zyme-Flow technology, cargo oil and slop tank cleaning, process plant and pipework cleaning, caisson cleaning with CCTV inspection, NORM decontamination and disposal, crude oil storage tank cleaning, and dry ice cleaning), Industrial Services (DISAB material handling, liquid ring tankers, emergency response), Water Jetting (HP/UHP from 2,000-40,000 psi), and Liquid Waste Management. The equipment hire division provides a specialized fleet including jetting units (57 LPM, 79 LPM, 18 LPM UHP), Hot Wash Units, 75-100 HP Vacuum Units, Premier Vacuum Transfer System, Hydraulic Molex Pumps, NESL Suction Filter, NESL Tank Sweep Packages, Graco Hydra-Clean Pressure Wash Units, Diaphragm Pumps, Hydraulic Dozers, Hand Held HP Diver Dump Lance, Pneumatic Hose Spoolers, Overboard Chutes, and Oil Skimmers.

Differentiator

Problem solved

Functional benefit

Products and services

• Oilfield Services

Quantifiable outcome

• 65% savings compared to traditional onshore NORM treatment methods
• +5 more outcomes

Named customers3 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Zyme-FlowcoreTechnology or IntegrationExclusive UK Licensee for Zyme-Flow Decon Technology - the worldwide leader in hydrocarbon process equipment decontamination. This proprietary chemistry achieves vessel entry in 8-12 hours while eliminating pyrophoric iron sulphides, H2S, benzene, and explosive gases. Denholm Environmental has completed hundreds of decontamination scopes across UK terminals, refineries and platforms, delivering over 200 turnarounds per year globally as a Zymeflow brand.

Scale indicators8 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Stork (a Fluor company): Stork is a specialist industrial services provider to oil & gas, power, and process industries, offering mechanical services, inspection, and maintenance similar to Denholm's oilfield cleaning/decontamination offerings. It directly competes in offshore and onshore turnaround work for major operators.
• TWMA: TWMA specializes in drilling waste management and environmental services for the oil & gas industry, operating both onshore and offshore. It competes with Denholm in liquid waste handling and offshore environmental services for major operators.
• Mactaggart Offshore: Mactaggart Offshore provides subsea and offshore support services to the oil & gas sector, including FPSO support, marine operations, and topside services. Its offshore service portfolio overlaps with Denholm's FPSO tank cleaning and topside shutdown work.
• Bilfinger UK: Bilfinger is a European industrial services group providing maintenance, turnaround, and environmental services to process industries including oil & gas, petrochemicals, and energy. Its UK operations offer tank cleaning, HP/UHP water jetting, and waste management services overlapping directly with Denholm's portfolio.
• Tideway BV: Tideway is a Dutch offshore services company specializing in subsea rock installation and offshore environmental services for the oil & gas and renewables sectors. It is a regional peer with comparable offshore services delivery in the North Sea market.

Emerging players

• Aquajet Systems AB: Aquajet is a Swedish-based specialist in high-pressure water jetting robotics and equipment for industrial cleaning applications. It is an emerging/niche player with overlapping technology in the HP/UHP jetting equipment segment that Denholm operates.

Broad incumbents

• Helix Energy Solutions Group: Helix is a US-based offshore energy services provider offering well intervention, decommissioning, and offshore oilfield services. Its decommissioning and offshore services create a comparable operating model in the offshore environmental services space.
• Veolia Environmental Services: Veolia is a global environmental services and waste management group providing industrial cleaning, hazardous waste handling, and decontamination services across many sectors. It is a broad incumbent with overlapping capability sets, particularly in liquid waste management.
• Clean Harbors: Clean Harbors is a large North American environmental services company providing hazardous waste management, industrial cleaning, and emergency response. It is a broad incumbent in many of the same service lines Denholm offers, though with a much larger geographic and customer footprint.

Regional players

• AF Gruppen (AF Offshore Decom): AF Gruppen is a Norwegian-based industrial group with significant offshore decommissioning and environmental services exposure through subsidiaries. It is comparable as a regional player addressing similar offshore services demand in the Norwegian sector.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance8 records

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&A1 record

Investments

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

Frequently asked questions about Denholm Environmental