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Location
In office (Dublin)
Seniority
Senior

Confirmed on the employer's own hiring board on Nov 8, 2026. First seen by Alion on Sep 18, 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:

  • Install, terminate Cat5e, Cat6, Cat6a, Cat7 copper cabling
  • Install, terminate and patch fibre optic cabling
  • Capable of testing copper cabling installation
  • Capable of testing fibre cabling installation
  • Troubleshoot cabling faults
  • Produce test results and handover documentation
  • Understand cabling drawings and schematics
  • Rack and stack IT and telecoms equipment
  • Patch and manage network connections
  • Support network upgrades and migrations
  • Install containment systems (cable tray / trunking)
  • Read and understand project specifications
  • Label and document installation to project specifications
  • Provide daily and weekly progress reports
  • Follow Health and Safety procedures
  • Ability to communicate clearly with Project Manager / Project supervisor and other trades on site
  • Support commissioning teams and project handover
  • Problem solving under pressure
  • All other duties associated with the role

Essential Criteria for the Role:

  • Excellent communication skills
  • Experience with testing fibre using ODTR / OLTS equipment
  • Experience reading detailed construction drawings / rack elevations / schematics / cable schedules
  • Previous experience leading a small team
  • MEWP working at height / manual handling certification
  • Basic computer skills ( MS Office Suite / Windows / MS Project)

Mercury is an equal opportunities employer .

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