Our People

John joined JSM in April 2021. His track record of value creation in Private Equity is particularly relevant to JSM’s current stage of development.

He has considerable experience of growing businesses both organically and through buy and build, scaling their operations and upgrading their capabilities to support growth across a number of industries. In his role as Chairman he plays a crucial role in supporting and guiding management on strategy, finance, business development and operations. John was the Operating Partner at Doughty Hanson for 18 years where he was responsible for value creation across the Industrials, Consumer/Brands, Services and Healthcare portfolio. He has considerable experience in the renewable energy sector, he was Chairman of LM Windpower for 12 years and is currently Chairman of GEV Windpower.

Stuart as co-founder and CEO of JSM Group leads the strategic direction and the operational management of the Company.

Stuart is a highly experienced CEO with comprehensive business knowledge, management and budgetary skills. A creative thinker with sound leadership ability and a proven aptitude in commercial and strategic planning.

Within the JSM team he has embedded a service culture to meet and ideally exceed client expectations, focusing on performance, quality, customer service and legislative compliance. Above all Stuart has a proven track record in leading significant sustainable growth for JSM since it’s creation in 1998.

John as co-founder and Chief Operations Officer of JSM is responsible for implementation of the company’s strategy and all matters relating to the operational performance of the business.

With decades of experience his in-depth knowledge of programming, planning and monitoring work programmes, he provides proactive solutions to engineering challenges, ensuring safety and quality are paramount.

The Operations team are at the very core of the overall JSM service offering and under John’s leadership they are able to provide a highly efficient central support to the entire business. John is passionate about the development of our own direct employees, the opening of the JSM Training Centre is testament to this.

Michael Booth joined JSM in 2024 as the Chief Financial Officer.

Dave is responsible for leading the Power business within JSM and heads up our service building new electricity networks, in addition to the repairing and maintaining of existing networks for transmission and distribution network operators.

Dave’s team provides the JSM electrical engineering capability including design, project and commercial management in this highly specialised market.

Drawing on over 30 years of electricity industry experience Dave started his career as an apprentice, quickly rising to Senior Manager level within London Electricity (now UK Power Networks). Knowledge and experience gained through working on very high profile major projects such as Canary Wharf and Kings Cross Dave provides the critical insight required to identify solutions and deliver our customers’ needs.

Dave is passionate about providing a high level of customer service and ensures that his team is equally focussed on achieving successful delivery of our projects with safety and quality paramount – ‘Your Energy delivered through our energy

Steve provides a crucial role in the growth of JSM into new markets within the Power industry, extremely important as the UK continues to develop its infrastructure to accommodate large power connections for data centres, transport and logistics, renewable generation and energy storage (BESS).

Steve held the position as Head of Major Connections at UK Power Networks for 10 years from 2011, a period which saw the greatest level of change in the profile of connections to the electricity distribution network ever seen – from hyperscale data centre connections to skyscrapers changing the London skyline; from TBM’s driving tunnels for major infrastructure to grid scale solar farms and battery storage.

Given his industry knowledge and experience Steve is able to provide our customers with valuable insight into getting a connection to the electricity network, this insight is supported by JSM’s in-house electrical and civil engineering teams providing a full end to end turnkey operation.

David as the Gas Director is responsible for leading our Gas team activities.

David ensures that our governance protocols are maintained and structured to meet customers’ specific needs.

With over 35 years’ experience, including 10 years at JSM, David has a vast wealth of experience in the construction and civil engineering sectors covering all Utilities including Multi-Utilities, Roads, Rail, construction, and refurbishment. Working in both the public and private sectors including having worked as Head of Commercial for the multi-utility installation at the Olympic Park for the 2012 Olympic Games.

Zoe proactively manages contractual matters from the inception of a project, and provides focused, practical advice with the sole aim of getting the transaction delivered on time, and in line with the client’s requirements.

Zoe joined JSM in 2008 and in her role as Legal Director, she ensures that the business is protected through her ability to identify and mitigate any legal risks that the company may be exposed to.

 Zoe has extensive experience in negotiating and drafting construction and engineering contracts and ancillary documentation based on industry standard forms and bespoke agreements.

Grant joined JSM in 2024 and is responsible for leading the Group’s Commercial activity.

Grant has extensive experience in the construction industry, specialising in regional and major construction, civil engineering, and fit-out projects. Demonstrated expertise in driving revenue growth and enhancing profitability in high-pressure environments. Committed to delivering excellence and fostering collaborative relationships to achieve organisational objectives.

Constance Dickie joined JSM in 2023 and is responsible for leading the Group’s Corporate Affairs.

Constance brings a wealth of experience in strategic marketing, impactful communications, and project planning from a rich background in Utilities. She is dedicated to crafting and executing strategies that resonate with clients, employees, and communities. Driven by a passion for building meaningful connections, Constance stimulates a collaborative and engaged corporate culture, ensuring that JSM’s values and objectives are effectively communicated and upheld.

Mark Fox joined JSM in 2024 as the Procurement Director.

Helen Stewart joined JSM in January 2025 as a chartered professional with over 20 years of global HR leadership experience.

Julie Reid joined JSM in 2024 as the Director of Finance.

Dave Warfield joined JSM in 2024 as the Business Transformation Director.