Senior Authorised Person

Company logo
Mercury
Builds and manages complex engineering and construction projects for leading global corporations.
Oversee electrical/mechanical testing, LOTO, permits, and energisation for retrofits.
20 days ago ago
Expert & Leadership (13+ years), Experienced (8-12 years)
Full Time
Dublin, County Dublin, Ireland
Onsite
Company Size
2,919 Employees
Service Specialisms
Construction services
Project Management
Consulting
Engineering
Design
Technical Services
Turnkey
Sector Specialisms
Life Sciences
Data Centres
Technology
Mechanical Services
Pharmaceutical
Oil & Gas
Utilities
Manufacturing
Role
What you would be doing
energisation planning
loto management
permit authorization
switching plans
safety reporting
testing coordination
  • Authorising of Energisation requests for medium voltage and low voltage systems
  • Establishing with the Engineering team a centralized Lockout Tag Out (LOTO) procedure and determining if a group or individual LOTO procedure will be required.
  • Ensuring high-risk statements of work , standard operating procedures and method of procedures (MOPs) are reviewed, and all sources of energy are identified.
  • Achieve safety from the system and issue of safety documents in accordance with specific Authorisation levels and client requirements.
  • Develop a detailed energisation plan for the site to identify the strategy and sequence to safety energise the equipment in line with the project program.
  • Identify high risk activities and establish a high-risk activity plan.
  • Establish the control of area permits to access live areas.
  • Authorise the signing of permits to work on or around live systems.
  • Co-ordinate with the commissioning team to ensure the timely and safe energisation of the live systems.
  • Cancel Permits should a hazard or safety issue arise.
  • Participating in high-risk activity (HRA) planning meetings associated with energy isolation.
  • Work with the clients authorising energy marshal and establish an energisation strategy for the site.
  • Ensure that the electrical and mechanical safety equipment has been purchased for the tasks required and is maintained and controlled by the authorising persons.
  • Participation in Planning Meetings to Ensure Coordinated Energizations and Isolations
  • Provide switching plans in accordance with pre-agreed project programs and liaise with the client CX agent.
  • Manage the site Electrical systems of working for LOTO and Permitting
  • Maintain the safety records for all energisations and isolations in accordance with the site electrical safe systems of work.
  • Manage the staff working controlling the electrical and mechanical systems are authorised for the works and qualified to carry out the work requested of them.
  • Maintain and control the LOTO systems to ensure the control of hazardous systems are maintained for the system in accordance with the site procedures.
  • Establishment of Consistency Around Project Team Energizations and Isolations
  • Providing Detailed Reporting to Client Team on Safety or Progress Related Matters
  • Authorises Isolation Permits and Certification for MV Systems
  • Attend site commissioning meetings to ensure the close coordination of the commissioning team and energy marshals.
  • Generating monthly reports highlighting activities and general status of energy isolation program.
  • Work with the utility provider where required to coordinate the energisation of the site supplies.
  • Ensuring all personnel are well-informed about and adhere to the Electrical Safe Systems of Work.
  • Manage the electrical and mechanical testing teams to ensure the require testing has been performed in accordance with the site operating procedures and standards.
  • Completing Medium Voltage Switching Plans and reviewing sub-contractors plans
  • Commencement of energy isolation activities with updates on a continuous basis.
  • Ensuring a process is established that verifies qualifications, training, and Personal Protective Equipment (PPE) for personnel performing the work.
  • Implementation and Audit of Safe Work Practices Associated with Energizations & Isolations
  • Work with the site safety management to maintain the Mercury safe systems of work.
What you bring
lv/mv/hv
scada
10+ years
electrical eng
hazardous energy
communicator
  • Have experience with industrial or commercial field engineering in mission-critical facilities and electrical infrastructures
  • Experience working on LV/MV/HV systems and Electrical Testing & Verification.
  • Are an excellent communicator verbally and in writing
  • Excellent comprehension and interpretation of Project Specifications, Drawings, SLD's, Cable Solutions, and Data Sheets.
  • Relevant 3rd level certificates in Electrical Engineering, Building Services Engineering, or an Electrical Trade with relevant training and experience.
  • Have experience in the control of hazardous energy in complex mission-critical infrastructure
  • Good understanding of control systems such as Scada/BMS/EMS, narrating LV/MV switching plans, and carrying out switching and isolating of Medium Voltage Systems.
  • A minimum of 10+ years' experience in a similar role within an electrical contracting environment, including Commercial, Industrial, pharma, and data centre projects.
  • Knowledge of discrimination study application for Short circuit/overload protection and earth/line fault currents.
  • Proficient analytical problem-solving skills with a focus on EHS and Quality Work Management Systems and Processes.
  • Proficiency in earthing arrangements and configurations, Busbar, busway systems, and interlocking of secondary energy sources.
  • Familiarity with FAT/SAT reporting for Electrical Switchgear philosophy and appreciation of Switchgear forms and separations.
  • Experience in managing energization/start-up of systems, including working on live systems.
  • A strong understanding of construction and safety requirements.
Benefits
Information not given or found
Training + Development
Information not given or found
Company
Overview
Founded 1972
Year Established
The company was established in 1972 by Frank O’Kane and Joe Morgan in Dublin.
â‚Ĵ500M Revenue
Annual Turnover
The company generates over â‚Ĵ500 million in annual revenue through large-scale, high-tech projects.
â‚Ĵ25M Milestone
Recent Project Achievement
Recently completed a significant â‚Ĵ25 million hyperscale data center facility.
25+ Countries
Global Reach
The company has successfully completed projects in over 25 countries worldwide.
  • Delivers complex engineering and construction projects—often turnkey mechanical, electrical, and commissioning works—across Europe and beyond.
  • Their specialisms span mechanical and electrical engineering, sprinkler and fire-protection systems, data-center infrastructure, and commissioning services.
  • The company’s history is marked by early adoption of BIM, prefabricated modular construction, and digital commissioning platforms—underscoring its tech-driven edge.
Culture + Values
  • WORK SAFE | HOME SAFE
  • BRAVE
  • DYNAMIC
  • MAKE IT HAPPEN
Environment + Sustainability
Top 25% Ranked
Sustainability Ranking
The company is recognized for its responsible business practices, ranking in the top 25% of companies globally as rated by EcoVadis.
50%+ Certified
Green Building Projects
Over half of the company's projects are pursuing LEED and BREEAM certifications, highlighting its commitment to sustainable construction practices.
33k kg CO₂ Neutralized
Carbon Offset Initiative
The company has neutralized 33,000 kilograms of carbon dioxide through its tree-planting program, contributing to global reforestation efforts.
100% Green Electricity
Energy Supply
All Irish offices and facilities operate on entirely green electricity, reducing the company's reliance on fossil fuels.
  • Achieved zero waste to landfill on projects across Ireland, UK, Italy, France, Netherlands, Poland and Belgium
  • Implemented Smart Waste tracking system to measure CO₂ emissions and waste data in real time
  • Disclosed environmental impact through CDP since 2020
Inclusion & Diversity
40+ nationalities
Global workforce diversity
The company's global workforce is comprised of employees from over 40 different nationalities.
2024 Gender Pay Gap Reports
Transparency in pay equity
The company has published Gender Pay Gap Reports in Ireland and France for 2024 to promote pay equity.
10 years
Career development support
Group mentoring programmes are available for staff in their first 10 years of their careers.
  • Executive-driven Diversity & Inclusion Policy embedded across employee lifecycle
  • Hosts talks, events and courses to support women in construction and improve gender equality
  • Group mentoring programmes for women and foreign nationals
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