Sustainability​/Mechanical Building Services Engineer

Sustainability / Mechanical Building Services Engineer

Are you an expert IES VE user with a passion for decarbonisation design? We have an exciting opportunity for a highly experienced mechanical building services design engineer to join our award-winning practice. Established in 1949, S I Sealy is the region’s leading employer of building services engineering talent and a previous winner of the CIBSE National Employer of the Year award.

About S I Sealy

• We work with high-profile clients locally and nationally on projects that make a real difference.
• We are at the forefront of helping organisations achieve net zero
  , using cutting-edge software and innovative design.
• Our culture is open, friendly and supportive, with a strong focus on professional growth.
• We are a Carbon Neutral business
  , verified to PAS
  2060.
• Hybrid working and flexible hours to support work-life balance.

Why this role is different

• You will play a key role in delivering net zero and decarbonisation strategies, supported by advanced modelling tools.
• Your expert-level proficiency in IES VE will be central to producing detailed thermal modelling and energy analysis for complex projects.
• LCC (Low Carbon Consultant), LCEA (Low Carbon Energy Assessor) or NDEA are mandatory for this role.
• You will lead mechanical design on major projects, mentor junior engineers, and influence sustainable design outcomes.

You will:

• Lead mechanical design and coordination across commercial, public sector and healthcare projects.
• Produce detailed engineering designs using IES VE, AutoCAD, and Revit, ensuring compliance with energy efficiency and low or net zero carbon requirements.
• Develop decarbonisation strategies for new and existing buildings.
• Manage client relationships and support business development.
• Mentor junior engineers and contribute to technical leadership within the team.

What We’re Looking For

• Exceptional proficiency in IES VE and demonstrable experience in thermal modelling and energy analysis.
• Strong interest and experience in decarbonisation design and low-carbon technologies.
• Essential
  
  Qualifications:
  
  
• LCC (Low Carbon Consultant)
• NDEA/LCEA Level 5 (Low Carbon Energy Assessor)
• ocDEA (On Construction Domestic Energy Assessor)
• DEA (Domestic Energy Assessor)
• One Click LCA
• NABERS
• CP1 – Heat Networks
• Other relevant sustainability and energy assessment certifications.
• Preferably BEng or MEng degree qualified, ideally Chartered.
• Membership of MCIBSE or MIMechE (IHEEM desirable).
• Minimum 5, ideally 10 years UK-based consultancy experience.
• Healthcare sector experience (HTMs/HBNs) or transferable skills such as cleanroom/laboratory design.
• Excellent project management and commercial awareness.

What We Offer

• Attractive salary and comprehensive benefits package:
• Private medical insurance
• Life insurance and income protection
• Generous holiday allowance (including your birthday off)
• Flexible hours and hybrid working
• Quarterly incentive payments
• Ongoing professional development with customised training and monthly CPD seminars.

We are nice people – who look to make a difference. If that also describes you, come join us.

S I Sealy is an Equal Opportunities employer. ISO
9001/14001/45001 & 19650 certified and verified Carbon Neutral to PAS 2060.

Mid-Senior level

Full-time

Management and Manufacturing

Construction

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