SES Bolsters South Board with Heath, Boyhan Roles

Key Points

• SES, an engineering services specialist, has appointed Mark Heath as preconstruction director for Engineering South.
• Luke Boyhan joins the board as commercial director for the same division.
• Appointments support growth across London and the wider South, targeting commercial development, fit out, and life sciences.
• Mark Heath previously served as estimating director and board director at Michael J Lonsdale, a mechanical and electrical specialist.
• Heath held the role of estimating director at Phoenix ME prior to Lonsdale.
• Heath brings over 30 years of experience in preconstruction and estimating on major mechanical, electrical, and plumbing (MEP) projects.
• In his new role, Heath oversees tendering, preconstruction, and customer engagement for SES’s southern teams.
• Luke Boyhan joined SES in 2021 and was most recently regional commercial director before this promotion.
• Boyhan has nearly 20 years of experience in commercial roles.
• Boyhan’s responsibilities include driving growth, client relationships, and commercial performance across the South.
• SES Engineering South is actively working on three major commercial projects in London for Mace, with operations extending to Bristol.
• London remains a core market, with further investment planned to fuel future growth, according to the firm.

SES (Cardiff Daily) February 04, 2026 – Engineering services specialist SES has appointed Mark Heath as preconstruction director and Luke Boyhan as commercial director for its Engineering South business, bolstering leadership to drive expansion across London and the South East. Both appointments to the Engineering South board aim to support sustained growth in key sectors including commercial development, fit out, and life sciences projects. The moves come amid ongoing major contracts and planned investments in the region.

Who Are Mark Heath and Luke Boyhan?

As reported by Harmsworth of Construction News, Mark Heath has joined SES from Michael J Lonsdale, where he served as estimating director and a board director. Prior to that, Heath was estimating director at Phoenix ME, accumulating more than 30 years’ experience in preconstruction and estimating on major MEP projects. In his new position at SES Engineering South, Heath takes responsibility for tendering, preconstruction, and customer engagement across the firm’s southern teams.​

Luke Boyhan, meanwhile, was promoted internally after joining SES in 2021 and serving most recently as regional commercial director, as detailed by Harmsworth of Construction News. Boyhan brings nearly 20 years’ experience in commercial roles and now leads efforts to drive growth, client relationships, and commercial performance across the South. These appointments reflect SES’s strategy to leverage seasoned expertise for regional expansion.

Why Did SES Make These Board Appointments?

The appointments come as SES seeks to support growth across London and the wider South, encompassing commercial development, fit out, and life sciences sectors, according to Harmsworth’s reporting in Construction News. London remains a core market for the business, with further investment planned to underpin future growth, the firm stated. This strategic bolstering of the Engineering South board positions SES to capitalise on burgeoning opportunities in these high-demand areas.

SES Engineering South continues work on three major commercial projects in London for Mace, with activity extending as far as Bristol, as noted by Harmsworth of Construction News. These ongoing contracts highlight the firm’s operational footprint and the timely nature of the leadership additions to manage increased workloads and pursue new tenders effectively.

What Is Mark Heath’s Background and New Role?

Mark Heath joined from mechanical and electrical specialist Michael J Lonsdale, where he was estimating director and a board director, Harmsworth reported for Construction News. He previously held the role of estimating director at Phoenix ME and brought more than 30 years’ experience in preconstruction and estimating on major MEP projects. In his new role at SES, Heath takes responsibility for tendering, preconstruction, and customer engagement across SES’s southern teams, ensuring robust bid management and client interactions.

This extensive track record equips Heath to navigate complex preconstruction phases on large-scale projects, aligning with SES’s growth ambitions in the competitive Southern engineering market.

What Is Luke Boyhan’s Professional Journey?

Luke Boyhan was promoted after joining SES in 2021 and most recently serving as regional commercial director, as covered by Harmsworth in Construction News. He brought nearly 20 years’ experience in commercial roles and took responsibility for driving growth, client relationships, and commercial performance across the South. Boyhan’s internal progression underscores SES’s commitment to nurturing talent while injecting fresh commercial acumen into board-level decisions.

His focus on client relationships positions him to strengthen SES’s partnerships, particularly amid expanding fit out and life sciences workloads.

How Does This Fit into SES’s Growth Strategy?

SES Engineering South’s board enhancements directly support expansion in commercial development, fit out, and life sciences, with London as a focal point, per Construction News by Harmsworth. The firm emphasised further investment to sustain momentum, amid active delivery on Mace-led London projects reaching to Bristol. These roles ensure preconstruction and commercial functions are optimised for tender wins and project execution.

The South’s infrastructure demands, from office refits to lab facilities, make such leadership vital for SES to maintain competitiveness.

What Ongoing Projects Involve SES Engineering South?

The business is engaged on three major commercial projects in London for Mace, with operations stretching to Bristol, as reported by Harmsworth of Construction News. This portfolio demonstrates SES’s entrenched presence in high-value contracts, where Heath and Boyhan’s expertise will enhance delivery. London’s status as a core market amplifies the strategic weight of these appointments.

Such projects often involve intricate MEP integrations, where preconstruction precision and commercial oversight prove decisive.

What Challenges Might Engineering South Face?

While specific challenges were not detailed in the Construction News article by Harmsworth, the appointments signal SES’s proactive stance amid sector pressures like supply chain issues and labour shortages common in Southern England. Growth in life sciences and fit outs requires agile leadership to address tender complexities and client expectations. Heath’s 30+ years and Boyhan’s commercial depth provide resilience.

London’s regulatory environment and competition further underscore the need for strengthened board capabilities.

Who Is Driving SES’s Southern Expansion?

Mark Heath and Luke Boyhan now spearhead key functions on the Engineering South board, as announced by SES and covered by Harmsworth in Construction News. Heath’s preconstruction remit and Boyhan’s commercial drive align with the firm’s growth across London, the South East, and beyond. Their combined decades of experience fortify SES’s regional operations.

This duo’s integration promises enhanced tender success and project profitability.

When and How Were These Appointments Announced?

The news broke in February 04, 2026 via Construction News, authored by Harmsworth, detailing both men’s immediate board integration. SES highlighted the roles’ focus on supporting expansion in commercial, fit out, and life sciences. No further timelines were specified, but the firm’s statement on London investments indicates imminent impacts.