Extending the life of subsea assets through reuse, refurbishment, and recertification—reducing lead times and supporting a sustainable energy future.

The Legacy Locker encompasses the following while meeting the circularity gaps:

  • Extends the life of subsea assets by refurbishing, recertifying, and repurposing obsolete equipment, offering a sustainable alternative to new manufacturing.
  • Reduces project lead times and enhances operational continuity through rapid access to critical components via a shared asset scheme.
  • Supports ESG and net-zero goals by minimising waste and quantifying carbon savings associated with equipment reuse and remanufacturing.
  • Addresses industry-wide obsolescence challenges by providing flexible, innovative, and cost-effective solutions beyond traditional OEM support.

Supporting Long-Term Asset Life for OEM Equipment

Legacy Locker is a trusted solution when original equipment manufacturers (OEMs) are no longer able to support operational needs.. J+S Subsea delivers tailored solutions that extend the life of critical subsea assets. When OEM support ends or components become obsolete, Legacy Locker steps in—providing refurbishment, reverse engineering, and recertification services to keep your equipment running reliably and efficiently, while minimising disruption and downtime.

Legacy Locker’s Expertise and Added Value

Legacy Locker offers more than just equipment sourcing—we provide engineered solutions. Backed by deep expertise in subsea design and manufacturing, our team delivers innovative, dependable results tailored to each client’s needs. We focus on long-term asset performance and integrity. Our trusted relationships with major operators are built on consistent delivery and a shared commitment to extending the life and value of critical subsea equipment.

Sustainable Solutions Through Reuse and Recertification

Legacy Locker is built on a commitment to sustainability, offering practical solutions that extend the life of your subsea equipment. Through remanufacture, recertification, or reuse of existing components, we help restore operational performance while minimising downtime. Our approach not only supports asset integrity but also contributes to carbon reduction and cost efficiency. All sustainability gains can be clearly reported to support your ESG objectives and demonstrate environmental responsibility.

Commitment to Net-Zero

Legacy Locker plays a key role in supporting the energy transition by enabling continued oil and gas production while advancing net-zero goals. Our solutions help operators maximise the value of existing assets—even in late-life or declining fields—by maintaining performance and extending operational life. We contribute to a more sustainable industry by reducing waste, minimising environmental impact, and supporting long-term asset efficiency as part of a responsible path toward net-zero.

Sensor Systems

We source and recalibrate a broad range of sensor systems, maintaining a stock of both refurbished and new sensors including:

  • Pressure and Temperature Sensors
  • Dual Sensors, Sand Detectors, Gas Lift Flow Meters
  • Inspection, testing to OEM or industry standards, refurbishment, re-certification, calibration, and provision of documentation packs.

Electrical Connections

Our inventory includes a wide array of electrical connectors and cables, featuring:
  • Industry-standard subsea connectors from Siemens, SE, MCE, Digitron, Spectron HV, Teledyne ODI, and Hydrobond.
  • All connectors are certified to the highest standards, available new or refurbished.

Hydraulic Systems

We offer a vast selection of hydraulic components, including:
  • Hydraulic couplers
  • Subsea Isolation Valves.
  • Services extend to sourcing original parts, second-source creation, and comprehensive refurbishment of subsea hydraulic assemblies.

Sensor Systems

We source and recalibrate a broad range of sensor systems, maintaining a stock of both refurbished and new sensors including:

  • Pressure and Temperature Sensors
  • Dual Sensors, Sand Detectors, Gas Lift Flow Meters
  • Inspection, testing to OEM or industry standards, refurbishment, re-certification, calibration, and provision of documentation packs.

Sensor Systems

We source and recalibrate a broad range of sensor systems, maintaining a stock of both refurbished and new sensors including:

  • Pressure and Temperature Sensors
  • Dual Sensors, Sand Detectors, Gas Lift Flow Meters
  • Inspection, testing to OEM or industry standards, refurbishment, re-certification, calibration, and provision of documentation packs.

Sensor Systems

We source and recalibrate a broad range of sensor systems, maintaining a stock of both refurbished and new sensors including:

  • Pressure and Temperature Sensors
  • Dual Sensors, Sand Detectors, Gas Lift Flow Meters
  • Inspection, testing to OEM or industry standards, refurbishment, re-certification, calibration, and provision of documentation packs.

Sensor Systems

We source and recalibrate a broad range of sensor systems, maintaining a stock of both refurbished and new sensors including:

  • Pressure and Temperature Sensors
  • Dual Sensors, Sand Detectors, Gas Lift Flow Meters
  • Inspection, testing to OEM or industry standards, refurbishment, re-certification, calibration, and provision of documentation packs.

Electrical Connections

Our inventory includes a wide array of electrical connectors and cables, featuring:

Hydraulic Systems

We offer a vast selection of hydraulic components, including:

Control Systems

We manage a range of services for subsea control systems, including:

Hardware

We stock various hardware to meet urgent needs, offering:

Cost Reduction Solutions for Obsolete Equipment

At J+S Subsea, we specialise in reducing the costs associated with maintaining and upgrading obsolete equipment. Our comprehensive services include:

Circularity is central to our sustainability and net-zero goals

We're committed to extending the lifecycle of subsea equipment and reducing environmental impact through reuse, repurpose and remanufacture

The Legacy Locker is driving positive change in our industry

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  • Registered in Scotland No : SC645331

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Accreditations & Affiliations

J+ S Subsea AGCC Logo 2021
Decom Mission Logo
J+S Subsea Forth & Tay Logo
J+S Subsea GUH Logo
J+S Subsea OEUK Logo
J+S Subsea Areg Logo
J+S Subsea OGV Logo
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Mark Patterson Non-Executive Chair

Mark Patterson

Non-Executive Chair

Mark’s career spans five decades, marked by entrepreneurial success and visionary leadership across various sectors, including offshore marine technology, subsea oil and gas, green energy storage, and more.

With a track record of leading businesses through start-up, growth, acquisitions, and transformations, Mark’s expertise lies in strategic decision-making, mentoring, and brand management.

He has overseen multimillion-pound projects, pioneered new technologies, and guided companies to international recognition, such as the underwater GPS NASNet®.

His leadership style is direct, inclusive, and based on trust, empowering teams to excel.

Mark’s achievements include managing high-profile global companies, such as Balmoral group, Nautronix and Well-Safe Solutions, where he played key roles in groundbreaking projects. Global explanation and high growth.

Outside of business, Mark is deeply committed to family and charity work, with a passion for shooting, boating, and car collecting. As an experienced executive, he remains dedicated to fostering success by identifying future opportunities and mentoring the next generation of leaders.

Mark Patterson Non-Executive Chair

Mark Patterson

Non-Executive Chair

Mark’s career spans five decades, marked by entrepreneurial success and visionary leadership across various sectors, including offshore marine technology, subsea oil and gas, green energy storage, and more.

With a track record of leading businesses through start-up, growth, acquisitions, and transformations, Mark’s expertise lies in strategic decision-making, mentoring, and brand management.

He has overseen multimillion-pound projects, pioneered new technologies, and guided companies to international recognition, such as the underwater GPS NASNet®.

His leadership style is direct, inclusive, and based on trust, empowering teams to excel.

Mark’s achievements include managing high-profile global companies, such as Balmoral group, Nautronix and Well-Safe Solutions, where he played key roles in groundbreaking projects. Global explanation and high growth.

Outside of business, Mark is deeply committed to family and charity work, with a passion for shooting, boating, and car collecting. As an experienced executive, he remains dedicated to fostering success by identifying future opportunities and mentoring the next generation of leaders.

Phil Reid Managing Director J+S-Subsea

Phil Reid

Managing Director

Phil has worked in the energy industry for over 25 years. He started his career with Kvaerner FSSL progressing through a variety of roles in subsea engineering, from manufacturing to leading some of their most complex projects all over the world. He worked with the original J+S for a period before moving on to Genesis Oil and Gas as a Subsea Controls Engineering consultant; during that period, he was seconded to Centrica Energy (now Spirit Energy) which led to a permanent role as Lead Subsea Controls & Umbilical Engineer for Developments, Capital Projects and Operated Assets. For almost a decade Phil successfully delivered Capital Projects from concept right through to project close out whilst also looking after the running of their subsea assets.

As part of J&S Subsea limited, Phil oversees the day-to-day operations and will grow the business both in the UK and globally. 

James Morris

Engineering Director

James’s career started when he joined the Royal Navy from school as an Artificer Apprentice. After a 5-year Marine Engineering Apprenticeship he served in surface ships HMS Glamorgan, HMS Edinburgh, and HMS Glasgow and at Rosyth as part of an engineering support team. 

Moving into the Energy Industry in 1992, over the next 26 years he gained a wealth of experience within large and small companies on operation, design and project management of subsea control systems and equipment. This period started with several years as a Project Engineer for a family run hydraulic services company Grampian Hydraulics followed by 5 years as a Support Engineer at Kvaerner Oilfield Products.  James joined RRC Controls Services ltd in 2001 before finally moving to J+S Ltd in 2010. At J+S his dedication and technical capabilities were rewarded with several promotions until becoming a member of the management buyout team. 

He has designed an extensive array of subsea equipment from basic cable penetrators to complete subsea control modules. 

James thrives on providing solutions for client’s problems. 

As Engineering Director, James will ensure that the company provides clients with timely, cost effective and technically sound solutions and services. 

Matthew Blair

Executive Chairman

Matt Blair is Executive Chairman of J+S Subsea which was formed in October 2020 through a management buyout of the Subsea Engineering Division of Systems Engineering and Assessment Ltd.

With J+S Subsea and SEA for over 14 years, Matt has a wealth of industry knowledge and expertise.

Previously an Electronics Engineer with Ferranti Computer Systems Ltd specializing in sonar and submarine command systems, Matt moved into hydrographic survey working with Subsea7, Tritech, and CDL before joining J+S Subsea.

He was Vice Chair of the Decom Leadership Group of Decommission and in that role, he facilitated industry and academic studies on potential for reuse and repurposing of decommissioned equipment. He is still actively involved with the reuse agenda through Decommission and OEUK.

Although not part of day-to-day operations, Matt stays close to company strategic matters and is seeking further opportunities to update and transfer Energy technologies and products into the Marine Renewables markets and help to develop the broader circular economy.

Contact Us

  • J&S Subsea Limited
  • The Lombard Centre
  • Kirkhill Place
  • Dyce
  • AB21 0GU
  • info@jands.co.uk
  • +44 1224 773435
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