Here is why you should choose us as your partner!

Full Scope Service

We provide a solution under one roof, delivering all core services. Including In-house mechanical works, managing specialist sub-contractors for electrical, ventilation, air conditioning, BMS, and more.

Check out our Services here!

Experienced In-House Estimating Department

Our team of dedicated estimators – ensure fast, accurate, and competitive quotations. We simply ask for the opportunity to tender and showcase our capabilities.

In-House Design Expertise

Our internal design team can assist with early-stage design input and value engineering to help secure and optimise your project.

Direct Labour Force

We employ approximately 25 skilled engineers directly, giving us greater control over quality, consistency, and scheduling.

Established and Reliable Supply Chain

We work with a long-standing network of trusted suppliers and subcontractors to ensure smooth and timely project delivery. This is critical to the success of any project.

Dedicated Management Team

From pre-construction to project delivery and aftercare, each project is assigned a dedicated management team to ensure continuity and accountability at every stage. Ensuring projects runs smoothly from start to finish.

Trusted and Reliable

With around 20 years of trading history, we’ve built long-standing relationships across Bristol and surrounding areas. 80% of our work comes from repeat business.

Check out our Case Studies here!

Multi-Sector Experience

We operate across all key sectors including education, healthcare, and commercial. Our website showcases the broad scale of projects we work on.

Collaborative Approach

We are not a claims-driven or contractual business. Our preferred method is to work closely with clients to ensure there is open communication, quicker problem-solving, and a shared commitment to achieve project success.

Strong Health & Safety Focus

We operate under robust health and safety systems including Citation and CHAS accreditation to ensure the highest standards are met on every project.

Accreditations and Compliance

We are a highly accredited company with certifications including Safe Contractor, Constructionline, and more.

Community Commitment

We actively work with local charities and strengthen community ties by supporting the local teams where possible!

What our clients say

"I am now on our second project with MJD; their family-run business has a wealth of knowledge with experienced and specialised staff. The supportive professional approach was provided by dedicated staff who provided support and technical know-how to get it right the first time. The design development, from stage 3 drawings to problem-solving, was some of the best I have experienced in many years. My first project with MJD was a complicated project in a live school in London, where expectations of the design were huge and constantly being changed. The team were vigilant in their installation and quality control, resolving issues as they occurred with a partnering/ teamwork approach to the finished product. I have never experienced such a complicated compact plant room, only possible due to the hard work of MJD. My current project with them is now drawn and well-coordinated with other trades and the structure. I wouldn’t hesitate to recommend them as a valued asset to any team"

Steve Burton Feltham Construction

"Over the past four years, I’ve had the pleasure of working with MJD on numerous decarbonisation projects, and they’ve consistently proven themselves to be a reliable and highly skilled partner. Their team brings a wealth of expertise in both mechanical and electrical services, always delivering work of the highest standard. Whether it’s a complex installation or a fast-paced refurbishment, MJD approaches every task with professionalism, attention to detail, and a proactive mindset. Their commitment to quality, safety, and client satisfaction has made them an invaluable part of our project delivery team. I look forward to continuing our successful partnership."

Frankie Corrado HI GROUP

"MJD have undertaken the mechanical works on several projects I have managed and are currently carrying out the upgrade, refurbishment and new build at Gloucester road Medical Centre, I have always found MJD to be very professional and proactive, there engineers are reliable and conscientious there work is very clean and methodical, wherever possible I will use MJD on future projects, I would recommend MJD for all types of mechanical works."

Kevin Campbell MD Group