Technical Engineer

RES Limited; Guildford; Hybrid; GBP 42,000 - 60,000; Full time

Benefits offered by this job

Company Car

Annual leave increasing with service

Pension matched up to 9%

Bonuses

Healthcare access

YuLife app

Cycle to Work

Job summary

RES Limited in the East of England is seeking a field-based Technical Sales Engineer to design and quote renewable heat pump projects. You will survey sites, agree system specs with installers and homeowners, and hand over projects with full documentation.

You will produce heat-loss calculations, room-by-room designs, and technical proposals using company tools, while providing on-site and remote support to installers. A consultative mindset and travel across UK are essential.

Qualifications

• Must have Level 3 NVQ or equivalent in Plumbing & Heating.
• Proven experience with heat pumps and MCS compliance.
• Strong knowledge of G3 unvented hot water and WRAS.
• Ability to translate technical data for non-technical customers.

Responsibilities

• Conduct technical site surveys, agree system specs, and produce on-site quotations.
• Produce heat loss calculations and room-by-room designs using company tools; prepare proposals and quotations.
• Act as Nominated Technical Supervisor for regional MCS projects and ensure compliance with Building Regulations.
• Provide phone-based and remote technical support, maintaining relationships with installers.

Skills

Consultative mindset

Translate technical data

Technical troubleshooting

Customer-focused communication

Education

Level 3 NVQ Plumbing & Heating

Heat Pump Design & Installation (LCL/BPEC)

MCS standards knowledge

Tools

CRM system

Design tools

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.