Job Description

Job Title:

Senior Mechanical Design Engineer (Design & Build)

Location:

St Albans / Hybrid (UK-wide projects)

Salary:

48,000 - 60,000 DOE + benefits

Contract:

Full-time, Permanent

About Us

We Are Bau Group is a private, family-run Mechanical & Electrical contractor that has grown significantly in recent years, delivering projects across the UK. With a strong pipeline of Design & Build work and expanding in-house capabilities, we are now looking to appoint a

Senior Mechanical Design Engineer

to lead and deliver building services designs internally.

This role is key to reducing reliance on external consultants and strengthening our technical offering across M&E, BMS, and Facilities Management.

The Role

As Senior Mechanical Design Engineer, you will take

technical ownership of Mechanical design

across our projects, working closely with project managers, site teams, CAD technicians, BMS engineers, and clients.

You will be responsible for delivering

fully compliant, buildable, and commercially sound designs

from concept through to completion.

This is a

hands-on design role

, not purely managerial.

Key Responsibilities

Deliver full

Mechanical designs

for Design & Build projects Produce and review calculations (heating, cooling, ventilation, power, lighting, etc.) Develop designs from

RIBA Stage 3-5

Coordinate Mech design with architectural, structural, and BMS requirements Manage and direct the

CAD technician

, ensuring accurate drawings and revisions Review subcontractor designs and technical submissions Support value engineering and buildability reviews Provide technical support to project managers and site teams Ensure designs comply with

CIBSE, BS, IET, and Building Regulations

Assist with technical input for tenders and pre-construction activities
Required Experience & Skills

Minimum

5-10 years' experience

in building services Mech design Strong background in

Design & Build contractor environment

(essential) Proven ability to design independently without reliance on external consultants Solid understanding of HVAC, electrical systems, and coordinated services design Experience working alongside CAD technicians and construction teams Confident communicator with clients, consultants, and internal stakeholders Competent using industry design software and calculations tools
Qualifications

Degree or HNC/HND in Building Services, Mechanical Engineering

Chartered status (CIBSE / IET) desirable but not essential

Chartered or working towards chartership advantageous
What We Offer

Competitive salary

48,000 - 60,000 DOE

28 days annual leave

, plus

Christmas Eve off

(where applicable)

Gym membership

Access to a

Wellbeing programme

Employee of the Month

recognition scheme Opportunity to shape and lead an

in-house design function

Career progression towards

Design Lead / Design Manager

Exposure to a wide range of projects and sectors

Additional annual leave reward

for

Employee of the Year

(extra day added to the following year's entitlement)
Why Join Us

This is an opportunity to join a business at a pivotal point -- where your experience will directly influence how design is delivered internally. You will have real autonomy, responsibility, and the chance to build something rather than inherit rigid systems.

Job Types: Full-time, Permanent

Pay: 48,000.00-60,000.00 per year

Benefits:

Company events Company pension Free parking Gym membership Health & wellbeing programme On-site parking
Work Location: In person