Sisk appoints two Managing Directors to bolster growth

Sisk has announced two senior appointments at Managing Director level to support its growth strategy. Brian Comaskey will lead Sisk’s Ireland East business unit, while Diarmuid O'Sullivan will head a newly formed Energy Business Unit. Both appointments come from within the company and reflect progress on Sisk’s planned expansion in construction and energy sectors.

What happened

Sisk announced the internal promotion of two executives to Managing Director roles. Brian Comaskey becomes Managing Director of Ireland East, reporting to the COO of the Sisk Construction division. Diarmuid O'Sullivan becomes Managing Director of a newly created Energy Business Unit, reporting to the COO of the Sisk Infrastructure division. Comaskey’s promotion follows more than 20 years with Sisk and several leadership roles across major Dublin projects. O'Sullivan will lead the new energy-focused unit as part of Sisk's broader strategy in infrastructure and energy projects.

Who is affected

The changes primarily affect Sisk’s internal leadership and project teams under the Ireland East unit and the new Energy Business Unit. Clients, suppliers, and partner organisations working with Ireland East projects may experience contact with a new Managing Director, while partners in the energy division will coordinate with the head of the new Energy unit. Specific individuals beyond the two appointees are not named in the available material.

Practical next steps

For stakeholders working with Sisk: update contact lists to reflect the new MDs for Ireland East and the Energy unit. If you are a client or supplier on Ireland East projects, expect communications from the Ireland East leadership about project plans and timelines. If you are a partner in energy projects, anticipate alignment with the new Energy Business Unit’s leadership on strategy and delivery. Sisk notes the promotions as part of continuing to grow and deliver its strategy, which may involve new project opportunities and organisational changes within its construction and energy divisions.

Limits and questions

The source material is an internal company update and does not provide detailed project portfolios, timelines, or performance metrics for the new roles. It also does not reveal whether these appointments affect staffing levels beyond the two MDs or how compensation might change. For readers seeking more information, the company statement would be the primary source to monitor for project-level impacts and future expansion plans.

Information and responsibility notice: This article is general information based on the cited material available when published. It is not legal, tax, immigration, medical, financial, banking, or investment advice; it does not create a professional-client relationship; and it is not a guarantee of outcome, availability, accuracy, or eligibility. Rules, schedules, prices, and third-party information can change. Confirm material decisions with the relevant authority and an appropriately qualified adviser before acting.