Sisk appoints new MDs: implications for UK project pipelines and energy teams
Reviewed by Tom Sullivan
First reported on The Construction Index
30 Second Briefing
Sisk has appointed Brian Comaskey as managing director for its Ireland East business unit and Diarmuid O’Sullivan as managing director of a newly created Energy Business Unit, reporting respectively to construction COO Steven McGee and infrastructure COO Leo Martin. Comaskey, with 22 years at Sisk, will target growth in Dublin residential and commercial projects while supporting healthcare, energy and infrastructure strategy. O’Sullivan will lead delivery of energy transition projects, with a mandate to build a dedicated, long-term business around cleaner and more secure energy schemes.
Technical Brief
- Reporting lines split by division: Comaskey into Construction COO, O’Sullivan into Infrastructure COO.
- Separation of regional building (Ireland East) from sectoral energy unit clarifies bid/no‑bid and risk ownership.
- New leadership structure should streamline interface between building projects and energy-related enabling works.
Our Take
Recent pieces on Sisk’s work at Battersea Power Station and the Berkswell battery energy storage project indicate a UK-heavy workload, so appointing new managing directors in the United Kingdom and Ireland East/Dublin likely reflects a need to balance governance between a growing UK book and a softer Irish/European market noted in Sicon’s 2025 results.
With Sicon Limited reporting that UK turnover is offsetting declines in Ireland and Europe, leadership focused on Sisk Construction and Sisk Infrastructure gives the group scope to differentiate strategy between higher-margin complex infrastructure (such as large BESS schemes) and volume building projects.
A 22-year tenure for Brian Comaskey at Sisk suggests the board is prioritising continuity and institutional memory at a time when our database shows Sisk taking on technically demanding brownfield and energy-transition projects, where client confidence in delivery track record is a key differentiator.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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