Technical Engineer

RES Limited; Hemel Hempstead; On-site; GBP 42,000 - 62,000; Full time

Benefits offered by this job

Company Car

Annual leave increasing with length of

generous pension scheme (matched up to

bonuses

enhanced maternity / adoption leave

free access to healthcare

YuLife app

Cycle to Work scheme

Job summary

RES Limited is seeking a Technical Sales Engineer to work field-based across the East of England. You will conduct technical site surveys, specify systems with installers and homeowners, and deliver on-site quotations and commissioning.

You will build strong relationships with customers, provide remote technical support, and ensure compliance with MCS standards and Building Regulations. The role includes travelling around the region and staying away overnight when required.

Qualifications

• NVQ Level 3 Heating/Plumbing or equivalent qualification.
• Proven Heat Pump design and installation knowledge (LCL/BPEC).
• G3 unvented water, WRAS compliance and MCS standards familiarity.

Responsibilities

• Conduct technical site surveys, agree system specifications with installers and homeowners.
• Produce on-site quotations, commission Air Source Heat Pump systems and handle handovers.
• Provide remote technical support and maintain relationships with installers.
• Ensure subcontracted installations meet MCS standards and Building Regulations.

Skills

Consultative mindset

Translate technical data

Site surveying

Customer liaison

Education

Level 3 NVQ or equivalent

LCL/BPEC Heat Pump Design & Installation

G3 Unvented Hot Water, WRAS & MCS knowledge

Job description

Technical Sales Engineer - Field Based - RES - Renewables - East England

Responsibilities

• Conducting technical site surveys, agreeing system specifications with installers and homeowners, producing on-site quotations, commissioning Air Source Heat Pump systems, completing system handovers, and resolving technical issues through remedial visits.


• Produce room‑by‑room heat loss calculations, system designs and performance assessments using company design tools and established processes, with full training and technical support provided. Compile technical proposals and quotations for the sales team, ensuring accurate project records are maintained within the CRM system.


• Acting as the Nominated Technical Supervisor for all regional MCS projects, ensuring every subcontracted installation adheres to MCS standards and Building Regulations.


• Providing phone‑based and remote technical support, maintaining strong working relationships with assigned installers, and acting as a consistent technical point of contact.

Qualifications

• Plumbing & Heating: Level 3 NVQ or equivalent.


• Heat Pumps: LCL/BPEC Heat Pump Design & Installation.


• Compliance: G3 Unvented Hot Water, WRAS, and a comprehensive knowledge of MCS standards.


• Technical Expertise: Proven experience in low-temperature hydraulic design and electrical fault‑finding.


• Soft Skills: A \"consultative\" mindset with the ability to translate technical data into actionable insights for non‑technical customers.


• Logistics: Based in/around East London or Ipswich, with a willingness to travel and occasional overnight stays.

Salary and Benefits

Competitive Salary + Company Car + Excellent Benefits

Benefits

• Annual leave (increasing with length of service)


• generous pension scheme (matched up to 9%)


• potential to earn bonuses


• enhanced maternity / adoption leave and access to a great range of online and high street discounts


• free access to healthcare


• our popular YuLife app


• our Cycle to Work scheme and more!

Employment Details

• This is a full-time, permanent, field based role working 42.5 hours per week Monday to Friday between 8am - 5pm.

About the Company

We are RES, a part of the Wolseley Group - a leading specialist trade merchant across the UK and Ireland. We pride ourselves in putting our people and customers at the heart of everything we do - and best of all, provide opportunities to develop skills and build careers through our award-winning Wolseley Talent Guild.