Sustainability / Mechanical Building Services Engineer

S.I. Sealy; Stockport; Hybrid; GBP 40,000 - GBP 60,000; Full time

Job summary

A leading design engineering firm in Stockport is seeking an experienced Sustainability / Mechanical Building Services Engineer to lead mechanical design across various projects. The ideal candidate will have exceptional proficiency in IES VE, a strong interest in decarbonisation, and a background in thermal modelling. They will mentor junior engineers and develop decarbonisation strategies for existing and new buildings. This full-time role offers an attractive salary and flexible working arrangements.

Benefits

Private medical insurance

Life insurance

Generous holiday allowance

Quarterly incentive payments

Ongoing professional development

Qualifications

• Exceptional proficiency in IES VE with experience in thermal modelling.
• Strong interest in decarbonisation design and low-carbon technologies.
• Minimum 5 years consultancy experience in the UK.

Responsibilities

• Lead mechanical design across various projects.
• Produce detailed engineering designs ensuring compliance with energy efficiency.
• Develop decarbonisation strategies for buildings.
• Mentor junior engineers and support business development.

Skills

IES VE proficiency

Decarbonisation design

Thermal modelling

Energy analysis

Project management

Education

BEng or MEng degree

Membership of MCIBSE or MIMechE

Tools

AutoCAD

Revit

One Click LCA

Job description

Location: Stockport
Ref: 0013
Contract: Full Time
Closes: 28/02/2026

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 PAS2060.
• 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
  • Stakeholder pension scheme
  • 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. ISO9001/14001/45001 & 19650 certified and verified Carbon Neutral to PAS 2060.