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Location
In office (Ireland)
Seniority
Senior · 5+ years exp

Confirmed on the employer's own hiring board on Nov 8, 2026. First seen by Alion on Sep 17, 2026.

Overview
Company
Impact
Profile match
At Mercury we build and manage complex engineering projects across a range of key sectors, including Hyper-scale Data Centres.

Mercury is the European leader in construction solutions.

We build and manage complex engineering & construction projects for the world’s leading corporations. Our solutions help deliver technologies and life changing advancements that connect people, communities and businesses, giving them the power to achieve incredible things. Our people have the courage to be innovative. Their determination and sharp focus enable us to deliver with certainty, time and time again.

We deliver our clients’ visions through leading edge construction solutions across multiple sectors, including: Enterprise Data Centres, Advanced Technology & Life Sciences, Hyperscale Data Centres, Fire Protection.

At Mercury, it is our duty to encourage and back our people to realise their vision of themselves. We place them at the heart of what we do, providing challenging opportunities to develop within a great team in a supportive environment that allows them to reach their full potential.

Key Responsibilities of the Role:

  • Responsible for managing staff needs in terms of travel and accommodation.
  • Attends meetings at the request of the senior management team, document minutes of the meetings and distribute minutes to all relevant parties.
  • Ensures that all employees have an appropriate environment to undertake their duties.
  • Co-ordinate, manage and order all office supplies.
  • Manages holiday rotas for all senior staff on site.
  • Manage the smooth running of the Administration, Payroll and Time Management team that will report directly.
  • Assists the business unit management on sensitive/commercial tasks within the business.
  • Organizes and maintains data in spreadsheets; generate reports; organizes paperwork and other related administrative duties as required.
  • To manage all office systems, procedures and facilities to ensure the efficient and smooth running of the office
  • To continually seek out best practice and more efficient ways of working to enhance office and general business efficiency.
  • Work with IT to ensure all IT supplies and hardware for the project are ordered on time.
  • Communicate to IT if replacements required.
  • Manage all office related service agreements.
  • To provide professional secretarial service to senior leadership team particularly in client correspondence and proposals, presentation preparation.
  • All other duties associated with this role.
  • Work in conjunction with HR to maintain office policies as necessary.

Essential Criteria for the Role:

  • Proven experience as an administrative assistant supporting senior management in a busy office environment for 5+ years.
  • Qualification in Business, Level 5 or higher
  • Experience working in a busy construction environment.
  • Excellent working knowledge of the Microsoft Office suite - Outlook, Excel, Word, PowerPoint, OneNote, SharePoint
  • Excellent working knowledge of SAP
  • Experience in processing high volume employee time management system
  • The ability to work with confidential information in a professional & trustworthy manner.
  • Excellent organizational, multi-tasking skills and dedicated to completing projects in a timely manner.
  • The confidence to respond to all enquiries effectively and professionally to the Senior Leadership team.
  • The ability to work on your own initiative and be an integral part of a busy team.
  • Ability to effectively manage time, prioritize tasks and work within deadlines with little supervision.
  • Ability to take initiative and exercise good judgment and be part of change management.
  • Ability to work in a fast-paced environment.

Mercury is an equal opportunities employer .

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