Principal Mechanical Design Engineer

🔒 Confidential Employer
Posted 7 May 2026
LOCATION
Antrim
TYPE
Full-time
LEVEL
Mid-Senior level
SALARY
£70,000 / year
CATEGORY
Engineering
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

Mechanical Building Services Design LTHW/MTHW/Steam Heating Systems AutoCAD Revit BMS Control Strategies Low-Carbon Technologies Heat Pump Systems Commissioning

FULL DESCRIPTION

Principal Mechanical Design Engineer

Based solely in local NI offices with a degree of flexibility, this is an opportunity for a Senior Mechanical Engineer with strong Mechanical Building Services Design experience to step into a leadership and delivery role in a fast moving and energetic sector.

Salary: £50-60K ~ £60-70k ~ £70k

Key Responsibilities

  • Managing the design delivery for decarbonising a range of commercial projects.
  • Delivering mechanical designs including schematics, calculations, plant selections, BOM’s, and project specifications.
  • Developing and validating BMS control strategies, from design through to on-site verification.
  • Collaborating with fabrication teams to ensure designs are accurately translated into manufactured solutions.
  • Supporting commissioning activities, including optimisation and proofing of BMS controls.
  • Attending internal and external design meetings and liaising professionally with clients, suppliers, and contractors.
  • Mentoring and developing junior engineers.

Requirements

  • Degree-qualified in Mechanical Engineering, Building Services, or equivalent.
  • Chartered Engineer ideal but not essential (CIBSE or equivalent).
  • Minimum 5 years’ experience in a similar mechanical design role.
  • Strong experience designing LTHW, MTHW, and steam heating systems.
  • Solid understanding of UK & European legislation, standards, and best practice.
  • Excellent communication, organisational, and problem-solving skills.
  • Ability to manage workloads independently while contributing to team targets.
  • Experience conducting site surveys, energy assessments, and audits.
  • Proven ability to coordinate mechanical layouts and service routes.
  • Fluency in written and spoken English is essential.

What You Would Ideally Have

  • Proficiency with AutoCAD, Revit, and BIM 360.
  • Experience using IES, Hysopt, or similar simulation software.
  • Delivery of energy efficiency measures and decarbonisation strategies.
  • Hands-on experience with low-carbon and heat pump technologies, including >1MW systems.
  • Knowledge of heat pump refrigerants and system optimisation.
  • Design of solar thermal installations and district heating networks.
  • Data centre experience (HTG & CHW systems).
  • BREEAM implementation on retrofit projects.
  • Building energy metering, monitoring, and verification.

Application Instructions

Full details – Call [contact hidden] and leave a message if necessary. Ideally forward CV to [Employer hidden — sign up to reveal].

Alternatively, .

The consultant managing your application will be an MEng or MSc qualified Engineer with experience in industry.

Contact

[Employer hidden — sign up to reveal], “The Studio” Sarah Jane Robinson House, Greystone Road, Antrim, N. Ireland, BT41 2SJ

(028) 94 462620 | ✉ [Employer hidden — sign up to reveal]

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