Technical Design Engineer

Bolt Technical Limited; Rickmansworth; Hybrid; GBP 32,000 - 38,000; Full time

Job summary

A leading manufacturer of plumbing solutions seeks a Technical Design Engineer in Croxley Green. You will manage customer inquiries and produce system designs for plumbing and HVAC projects. The role requires strong design and estimating experience, and candidates with an HNC or degree in Mechanical Engineering will be favored. Benefits include a competitive salary up to £38,000, annual bonus, hybrid work, and career development opportunities.

Benefits

25 days holiday plus Christmas shutdown

Health Cash Plan

Life Insurance

Up to 5% Pension Match

Excellent career development opportunities

Qualifications

• Proven experience in design and estimating roles within plumbing, heating or HVAC sectors.
• Strong technical mindset with a good grasp of design principles.
• Candidates with estimating experience and interest in developing design capability are encouraged.

Responsibilities

• Support the UK Sales Team by managing customer enquiries.
• Produce commercial and domestic system designs and estimates.
• Create technical drawings and material lists for client proposals.
• Provide day-to-day technical support to sales and marketing teams.

Skills

Design and estimating experience in plumbing

Technical mindset

Proficiency in CAD tools

Excellent communication skills

Problem-solving skills

Education

HNC / Degree in Mechanical Engineering

Tools

MS Office

Salesforce

Job description

Job Title: Technical Design Engineer

Location: Croxley Green, Hertfordshire – Hybrid (3 days office / 2 days home after training)

Salary: Up to £38,000 per annum (DOE) + Annual Bonus + Benefits

Hours: Monday – Thursday 8:30 am to 5:15 pm, Friday 8:30 am to 4:15 pm (40 hours per week)

Are you a technically minded engineer with experience in estimating and design within plumbing, heating, or HVAC systems? This is an excellent opportunity to join a leading manufacturer of innovative plumbing and heating solutions, supporting both domestic and large‑scale commercial projects across the UK.

Working within the Projects Team, you’ll play a vital role in providing technical, design and estimating support to the UK Sales Team, helping deliver accurate system designs, quotations and customer solutions for a variety of building applications.

Key Responsibilities

• Support the UK Sales Team by managing customer enquiries and providing timely technical advice.
• Produce commercial and domestic system designs, quotations and estimates.
• Create technical drawings, hydraulic calculations and material lists for client proposals.
• Provide day‑to‑day technical support to sales and marketing teams.
• Ensure design and estimating deliverables are completed on time and to specification.
• Assist in the development of design tools, processes and documentation.
• Develop proficiency with company software and systems through structured training.

What They’re Looking For

• Proven experience in design and estimating roles within plumbing, heating or HVAC sectors.
• Strong technical mindset with a good grasp of design principles, fluid mechanics and heat transfer.
• Proficiency in CAD tools, MS Office and relevant engineering or CRM software (e.g., Salesforce).
• Excellent communication and problem‑solving skills with a collaborative approach.
• HNC / Degree in Mechanical Engineering or related discipline (advantageous).
• Candidates with strong estimating experience and interest in developing design capability are encouraged to apply.

What They Offer

• Competitive salary up to £38,000 (DOE) and annual company bonus.
• 25 days holiday plus Christmas shutdown.
• Health Cash Plan, Life Insurance and up to 5% Pension Match.
• Hybrid working (after training).
• Excellent career development and training opportunities in a supportive, social team environment.

Join a business where team culture, technical growth and innovation come first. You’ll be part of a collaborative environment where your input is valued and your development supported while working on projects that shape the future of sustainable building solutions.