Technical Engineer

RES Limited; Southend-on-Sea; Hybrid; GBP 42,000 - 62,000; Full time

Benefits offered by this job

Company Car

Pension Scheme

Bonuses

Annual Leave

Job summary

RES Limited is seeking a Field Based Technical Sales Engineer in the East England region. The role covers site surveys, system design, and on-site commissioning of Air Source Heat Pump systems, with a focus on compliant, high-quality installations.

You will provide technical support, translate data for customers, and travel as required across the region to support installers and homeowners. A Level 3 NVQ in Plumbing & Heating is advantageous and a strong consultative selling mindset is essential.

Qualifications

• Experience in field-based technical sales within the renewables/heating sector.
• Ability to translate complex technical data for non-technical customers.
• Proven track record of on-site surveys, design calculations and quotations.
• Knowledge of MCS standards, WRAS and gas/heating compliance is a plus.

Responsibilities

• Conduct technical site surveys and agree system specifications with installers/homeowners.
• Produce room-by-room heat loss calculations and system designs using design tools.
• Prepare technical proposals and quotations for the sales team whilst maintaining CRM records.
• Act as Nominated Technical Supervisor for regional MCS projects and ensure compliance.

Skills

Technical sales

Customer-facing

Consultative selling

Communication skills

Education

Level 3 NVQ or equivalent (Plumbing & Heating)

Tools

CRM system

Job description

As a Field Based Technical Sales Engineer you'll be responsible for:

• 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. 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. Competitive Salary + Company Car + Excellent Benefits

Technical Sales Engineer - Field Based - RES - Renewables - East England So, who are we? 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. Also, did we mention? In addition to the competitive salary, there are also benefits on tap - including . Annual leave (increasing with length of service), a 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. We also promote positive health and wellbeing by offering free access to healthcare, our popular YuLife app, our Cycle to Work scheme and more!, This is a full-time, permanent, field based role working 42.5 hours per week Monday to Friday between 8am - 5pm.