What OSL Consulting does

OSL Consulting Engineers Ltd is a UK-based, privately held engineering consultancy founded in 2005 and headquartered in Hull, England, operating as a subsidiary of Nexos. The firm delivers multi-discipline engineering and project management services—from concept and pre-FEED studies through FEED, detailed design, and EPCm delivery—for energy-intensive and hazardous process industries. Its technical scope covers process, safety, control and instrumentation, electrical, mechanical, rotating equipment, piping, structural, civil, cost engineering and procurement, and construction and commissioning support, executed using industry-standard tools (HYSYS/UNISIM, AspenONE, AutoCAD Plant 3D, Trimble/Amtech) and supported by its proprietary Clever Thinking® methodology and DecRisk Integrated Projects® risk-evaluation framework.

The company serves enterprise clients in natural gas processing, LNG and LPG, chemicals (including COMAH-regulated sites), energy transition (CCUS, hydrogen, electrification), and waste conversion. Named customers include E.ON, BP, TotalEnergies, Perenco, Oando, Centrica Storage, Spirit Energy, EKB, and IM Skaugen, with project delivery spanning the UK, continental Europe, Africa, and the Middle East; representative engagements include a €275mm underground gas storage EPCm in Germany and a 7,600-tonne LPG FEED in Nigeria. The firm complements its consultancy work with a specialist technical recruitment arm (OSL Recruitment) that places permanent and contract engineers into oil, gas, petrochemical, chemical, and clean-energy clients.

OSL generates revenue on a project-based professional services model, with pricing tied to scope, complexity, and duration and contracts typically structured as multi-year engagements. GTM is enterprise field sales, driven by account management and business development teams targeting large operators in regulated, safety-critical process industries. The firm is IChemE Silver Corporate Partner, holds an Accredited Company Training Scheme, and maintains ISO 9001:2015, ISO 14001:2015, and Cyber Essentials certifications, reinforcing its positioning as a quality-led, accredited specialist consultancy.

Name

OSL Consulting

Legal name

OSL Consulting Engineers Ltd

Website

https://oslconsulting.com

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

51–100 employees

Short description

OSL Consulting Engineers is a Hull-based UK engineering consultancy delivering multi-discipline front-end engineering, detailed design, and EPCm services for enterprise clients in natural gas, LNG/LPG, chemicals, and energy transition hazardous process industries.

Ownership category

akta.pro rank

Product category

Engineering Consultancy Services

NAICS

Engineering Services (54133), Management Consulting Services (54161)

SIC

Services-Engineering Services (8711), Services-Management Consulting Services (8742)

akta.pro primary industry

Industrial & Process Engineering Consulting (BPAHAIAF)

akta.pro secondary industries

Energy Systems & Power Engineering Consulting (BPAHAIAG), Instrumentation, Controls & Automation Engineering Consulting (BPAHAIAM), Oil & Gas / Energy Field Services Staffing (BPACAEAF)

Keywords

• Engineering consultancy services
• FEED engineering studies
• EPCm project delivery
• Gas processing design
• Hazardous process industries

Headquarters

HQ city

Kingston upon Hull

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consultancy and Design Services: Project-based engineering consultancy fees covering concept studies, FEED, detailed design, and EPCm services. Revenue is generated through professional engineering service contracts with clients in hazardous process industries.
2. Recruitment Services: Specialist technical recruitment services providing permanent and contract engineers to clients. Includes retained search, headhunting, and contractor management services.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

OSL Consulting Engineers provides multi-discipline engineering consultancy and design services for energy-intensive and hazardous process industries, covering concept, FEED, detailed design, EPCm and project management across natural gas processing, LNG/LPG, chemicals, energy transition and waste conversion sectors. The firm additionally offers specialist technical recruitment (permanent and contract engineering staff) to clients in oil, gas, petrochemical, chemical and clean energy industries.

Product overview

OSL Consulting Engineers is a creative and technically minded engineering consultancy offering tailored solutions for energy transition and hazardous process industries. Their core offerings consist of Engineering Consultancy and Design services and OSL Recruitment services. The Engineering Consultancy encompasses Discipline Engineering (covering Process, Safety, Control & Instrumentation, Electrical, Mechanical, Rotating Equipment, Piping, Structural, Civil, Cost Engineering & Procurement, and Construction & Commissioning), Design Development and Implementation (concept through FEED to detailed design, EPCm and project management), Engineering Consultancy (Owner's Engineer, Design Validation, Technical Due Diligence, Commissioning Support, R&D Commercialisation), and Project Evaluation and Analysis (risk evaluation, cost estimation, value engineering). Their unique Clever Thinking® methodology underpins their approach to delivering innovative, cost-effective solutions. OSL Recruitment provides specialist technical staffing across multiple engineering sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Engineering Consultancy and Design Multi-discipline engineering and project management service covering concept, FEED, detailed design, EPCm and implementation for energy-intensive and hazardous process industries, including discipline engineering (process, safety, C&I, electrical, mechanical, rotating equipment, piping, structural, civil, cost engineering & procurement, construction & commissioning support), advisory services (Owner's Engineer, Design Validation, Technical Due Diligence, Commissioning Support, R&D Commercialisation) and project evaluation and analysis (risk evaluation, execution planning, cost estimation, value engineering). Sold to enterprise operators in oil & gas, LNG/LPG, chemicals, energy transition and waste conversion sectors.
• OSL Recruitment Specialist technical recruitment service supplying permanent and contract engineers to clients in the oil, gas, petrochemical, chemical and clean energy industries, including retained search, headhunting and contractor management services. The service is run by an experienced Recruitment Manager applying a structured candidate management process focused on motivations, behaviours and ongoing engagement.

Quantifiable outcome

• EPCm project delivered for €275mm underground gas storage facility taking 4 years from design to commercial operation
• +3 more outcomes

Named customers12 records

Segments5 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• NexoscoreOthersOSL Consulting Engineers Ltd is a Nexos company. Nexos is the parent organization that owns OSL. OSL's logo displays 'A Nexos company' indicating a corporate ownership relationship.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Kent plc: Mid-sized UK-headquartered engineering consultancy delivering EPCm, FEED, and multi-discipline engineering services to the energy, oil & gas, and petrochemical sectors. Most directly comparable to OSL on scale (mid-market), service mix (process/control/mechanical), and customer base (IOCs and midstream operators).
• Penspen: UK-based energy engineering consultancy specializing in onshore/offshore oil & gas, midstream, and pipeline engineering services. Closely comparable on FEED/pre-FEED front-end engineering focus, gas processing expertise, and oil & gas client roster.
• Petrofac: Integrated service provider to the oil, gas, and energy industries, offering engineering, procurement, construction, and project management services. Overlaps directly with OSL's EPCm and FEED service offering to IOC clients, though Petrofac is significantly larger and EPC-heavy.
• AtkinsRéalis: Global engineering services and project management firm with strong energy, infrastructure, and process industry practices. Comparable multidisciplinary engineering offerings to OSL with overlapping oil & gas and energy transition capabilities.
• BGEN (Bilfinger UK): UK-based process engineering consultancy and EPCm provider serving energy, chemicals, and industrial clients under the Bilfinger group. Highly comparable to OSL on process/control/mechanical multi-discipline services, hazardous-industry focus, and mid-sized UK scale.
• SLR Consulting: Global environmental and engineering consultancy with strong energy transition, chemicals, and oil & gas advisory practices. Comparable mid-market scale, multi-discipline engineering offering, and energy transition pivot aligning with OSL's growth verticals.

Broad incumbents

• Worley: Global energy, chemicals, and resources engineering firm delivering project delivery, consulting, and EPCm across oil & gas, energy transition, and chemicals. Competes with OSL in the same FEED/EPCm arena but at substantially larger scale and broader portfolio.
• Wood Group (Wood plc): Global engineering and consultancy business with deep energy, process, and industrial expertise across upstream, midstream, and energy transition. Directly comparable line of business to OSL but operating at much larger scale and international footprint.
• KBR, Inc. Global engineering, procurement, and construction firm serving hydrocarbons, energy, and government sectors. Competes with OSL across engineering consultancy and EPCm, but operates as a much larger incumbent across broader markets including defense and science.

Emerging players

• Subsea7: Global subsea engineering, construction, and services company with deep expertise in subsea field development and offshore engineering. Comparable to OSL on the Spirit Energy subsea cyclone separator engagement, though focused exclusively on the subsea segment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/oslconsulting
• LinkedInlinkedin.com/company/osl-consulting

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 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 OSL Consulting