SJ BARTLETT LTD

What SJ BARTLETT LTD does

SJ Bartlett Ltd. is a privately held UK engineering consultancy founded in 2020, headquartered in Saffron Walden, Essex, that delivers safety, engineering, and risk management services to operators in high-hazard industries — primarily railways, nuclear, defence, and energy. The firm's core offerings centre on systems assurance and safety case development, RAM (Reliability, Availability, Maintainability) engineering, and ALARP (As Low As Reasonably Practicable) assessments, drawing on chartered engineering credentials and methodology-driven delivery rather than any proprietary software product. The leadership comprises Stephen Bartlett (Managing Director and Principal Consultant – Rail, a Chartered Engineer with the IMechE and 15+ years across UK, Ireland, Asia, Australia and North America) and John Bartlett (Principal Consultant – Nuclear, a chartered mechanical engineer with civilian and naval nuclear, chemical process, and marine expertise including submarine technology and pressure vessels).

The business model is a classic project-based professional services consultancy. Revenue is generated through bespoke, quote-priced engagements delivered directly by senior consultants to enterprise and government clients; pricing is not publicly disclosed and there is no subscription, SaaS, or productised revenue stream. Go-to-market is direct enterprise engagement by the principals themselves, supplemented by a basic marketing website (sjbartlett.com) and newsletter signup. Customer evidence to date includes Irish Rail, the Cross River Rail / John Holland consortium in Brisbane, the UK Submarine Delivery Agency, Inland Rail G2Konnect, Metro North Railroad, McKalla Station, and a nuclear fuel transportation client, with delivery footprint across the UK, Ireland, Australia, and the United States. The firm is bootstrapped, founder-owned, and privately held, with no disclosed external funding, parent company, or acquisition activity.

Name

SJ BARTLETT LTD

Legal name

SJ Bartlett Ltd.

Website

https://sjbartlett.com

Company type

Private

Founded year

2020

Operating status

Operating

Headcount range

1–10 employees

Short description

SJ Bartlett Ltd. is a UK-based engineering consultancy founded in 2020 delivering safety, systems assurance, RAM, and ALARP services to high-hazard industries — railways, nuclear, defence, and energy — across the UK, Ireland, Australia, and the United States.

Ownership category

akta.pro rank

Product category

Engineering Safety Consulting

NAICS

Engineering Services (541330), Engineering Services (54133), Other Scientific and Technical Consulting Services (54169), Other Scientific and Technical Consulting Services (541690), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Reliability, Safety & Risk Engineering (RAMS/PSM) Consulting (BPAHAIAK)

akta.pro secondary industry

Systems Engineering & Technical Program Management (BPAHAIAI)

Keywords

• Safety engineering consulting
• Rail systems assurance
• Nuclear safety consultancy
• RAM engineering services
• Risk management consulting

Headquarters

HQ city

Warrington

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

Revenue model

1. Consultancy Services: Professional consulting services in safety, engineering, and risk management delivered by chartered engineers and subject matter experts. Revenue generated through project-based engagements with high-hazard industry clients.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels2 records

Core offering

SJ Bartlett Ltd is an agile Safety, Engineering and Risk Management Consultancy that delivers specialist technical services to operators, owners, and contractors in high-hazard industries. Its practice spans Systems Assurance, RAM (Reliability, Availability, Maintainability) Engineering, ALARP assessments, Safety Case development, and Systems Integration/Interoperability. Engagements are led by chartered engineers and delivered across the UK, Ireland, Australia, and the United States.

Product overview

SJ Bartlett Ltd. is a consultancy firm, not a software product company. It provides agile Safety, Engineering and Risk Management Consultancy services to high hazard industries including railways, nuclear, energy, and defence sectors. The company operates with a management team of specialized consultants (Stephen Bartlett as Managing Director & Principal Consultant - Rail, and John Bartlett as Principal Consultant - Nuclear) and delivers projects across the UK, Ireland, Australia, and the United States. Services offered include Safety Assurance, Systems Engineering, and RAM (Reliability, Availability, Maintainability), with projects spanning rail infrastructure, submarine delivery, and nuclear fuel transportation. No discrete software products, modules, or branded offerings were identified in the source data — the company operates as a professional services consultancy rather than a product-based business.

Differentiator

Problem solved

Functional benefit

Products and services

• Safety, Engineering and Risk Management Consultancy End-to-end specialist consultancy covering Systems Assurance, Safety Case development, RAM (Reliability, Availability, Maintainability) Engineering, ALARP demonstration, and Systems Integration/Interoperability support. Served to operators, owners, and contractors in rail, nuclear, energy, and defence sectors across the UK, Ireland, Australia, and the United States.

Named customers7 records

Segments4 records

Ideal customer profiles1 record

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 and minor.

• Irish RailcoreStrategic or Co-development PartnerIrish Rail is a key client partner for whom SJ Bartlett Ltd. has delivered multiple projects including the NTCC Irish Rail project (Safety Assurance, Systems Engineering, RAM) and the Irish Rail-EU IOD Assessment for Interoperability in Dublin, Ireland.
• John HollandcoreStrategic or Co-development PartnerJohn Holland is a major Australian infrastructure company and a client partner. SJ Bartlett has worked on projects including Cross River Rail system integration in Brisbane, Queensland.
• HatchminorStrategic or Co-development PartnerHatch is an engineering consultancy firm shown in the client gallery. The nature of the engagement appears to be project-based consultancy collaboration in the infrastructure sector.
• Submarine Delivery Agency (SDA)coreStrategic or Co-development PartnerSDA is a UK defence agency for whom SJ Bartlett Ltd. has provided Subject Matter Expert services and Safety Case Development in Bristol, UK, representing a key government defence client.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• LTK: LTK is a US-based engineering consultancy focused on rail vehicle and systems engineering, including RAM and safety assurance work. It serves a closely comparable client base (transit and rail operators) and its logo appears in SJ Bartlett's partner gallery, indicating active market overlap.
• Acmena: Acmena is an Australian engineering consultancy providing systems engineering, safety, and RAM services to rail and other infrastructure clients. It is a directly comparable peer in the same niche and geographies (notably Australia) and its logo appears in SJ Bartlett's partner gallery.
• Frazer-Nash Consultancy: Frazer-Nash is a UK systems and safety engineering consultancy serving rail, nuclear, and defence clients. Its work on systems assurance, safety cases, and regulatory support directly competes with SJ Bartlett's core capabilities in the same high-hazard verticals.
• Ebeni: Ebeni is a UK-based engineering consultancy providing safety, RAM, and systems engineering services to rail and other safety-critical industries. It is a like-for-like competitor to SJ Bartlett in the same niche, and its logo appears in SJ Bartlett's client/partners gallery, evidencing market overlap.
• Risktec Solutions: Risktec is a UK-based consultancy specializing in risk, safety, and reliability engineering for rail, nuclear, oil & gas, and defence clients. Its service lines (ALARP, RAM, safety case development) directly overlap SJ Bartlett's offerings and target a similar high-hazard client base.

Broad incumbents

• Mott MacDonald: Mott MacDonald is a global engineering consultancy with extensive rail, nuclear, and energy advisory practices. Its systems assurance and safety teams routinely bid against smaller niche firms like SJ Bartlett on high-hazard infrastructure programmes.
• Hatch: Hatch is a global engineering consultancy with deep rail, nuclear, and infrastructure practices. It serves as both a partner and competitor on larger bids in the same high-hazard verticals SJ Bartlett targets.
• John Holland: John Holland is a major Australian infrastructure contractor that delivers rail and tunnelling projects. SJ Bartlett has worked as a sub-consultant on John Holland-led programmes (e.g., Cross River Rail), positioning John Holland as both a key partner and a broader market incumbent.
• AtkinsRéalis (formerly SNC-Lavalin): AtkinsRéalis is a major engineering consultancy with rail, nuclear, and defence practices that deliver safety case, RAM, and systems engineering services. It represents a larger incumbent competing for the same high-hazard sector contracts.
• WSP: WSP is a global professional services firm with dedicated rail, nuclear, and defence practices offering RAM, safety case, and systems engineering. It competes for the same government and infrastructure clients as SJ Bartlett but at much larger scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/sj-bartlett-ltd

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 SJ BARTLETT LTD