Technical Support Agent

Mixergy; Eynsham; On-site; GBP 28,000 - 34,000; Full time

Benefits offered by this job

Benenden Healthcare

Health Cash Plan

Employee Assistance Programme

Cycle to Work

Free on-site parking

Pension contributions

Income protection

Share options

Discount scheme

33 days holiday

Flexible working

Job summary

Mixergy is hiring a Technical Support Agent in Oxfordshire for a full-time, office-based role. You will handle inbound calls and HubSpot tickets, diagnose hardware and software issues, assist with commissioning, and guide users through our energy solutions.

You will support homeowners, installers, and building managers while maintaining a high standard of customer care. Join during a growth phase with a focus on learning and knowledge sharing across the engineering and service teams.

Qualifications

• Sound technical aptitude and a genuine interest in learning how our solutions work.
• Strong problem-solving and troubleshooting skills with a methodical approach.
• High standard of customer care and calm, professional conversations.
• Clear written and verbal communication; well organized to prioritise workload.

Responsibilities

• Be first point of contact for inbound calls and HubSpot tickets across customers and partners.
• Log, categorize and prioritise enquiries; own tickets through to resolution.
• Escalate to second-line or engineering with clear handovers and context.
• Diagnose and resolve product, hardware and firmware issues.
• Support customers through commissioning and app/home energy management.
• Troubleshoot connectivity and network issues; use diagnostic tools.
• Handle emergencies with calm guidance and correct escalation.

Skills

Technical aptitude

Problem-solving

Customer care

Communication

Organisational skills

HubSpot CRM

Tools

HubSpot

Job description

Location: Eynsham, Oxfordshire (office based)

Working pattern: Full time, 37.5 hours per week, Monday to Friday

Contract: Permanent

Salary: 28,000 - 34,000 per annum

About us

We are on a mission to decarbonise homes and help households save on their energy bills. Founded on research from the University of Oxford in 2014, we have grown into a company with world-class technology tackling one of the biggest challenges in the energy transition: hot water.

As the UK electrifies, every home will need a hot water cylinder. Our smart technology turns each one into a connected heat battery, helping the grid take on more renewable energy while lowering bills for homeowners and tenants.

In 2025 we were awarded the King's Award for Enterprise in Innovation, and we recently secured 12 million in funding led by Barclays Climate Ventures to accelerate our next phase of growth. We are also an accredited Living Wage Employer.

The role

As a Technical Support Agent you will be a first point of contact for everyone who relies on our smart hot water solutions, from homeowners and installers to merchants, developers and building managers. Working from our helpdesk, you will take inbound calls and HubSpot tickets, get to the bottom of technical and product issues, and guide people through commissioning, connectivity and everyday use of our products and app.

You will support homeowners and end users, installers, merchants, new build developers, social housing managers and commercial building managers.

What you will be doing

Helpdesk and customer support

• First point of contact for inbound calls and HubSpot tickets across our full customer and partner base
• Log, categorise and prioritise every enquiry accurately in HubSpot
• Own tickets through to resolution, keeping customers informed on timescales
• Escalate to second-line, engineering or field teams with a clear handover of the diagnosis and steps already taken

Technical support and troubleshooting

• Diagnose and resolve product, hardware and firmware issues across our cylinder range, including heat pump, commercial and Cube X solutions
• Support customers and installers through commissioning
• Help users set up and get the most from our app and home energy management system
• Troubleshoot connectivity and network issues affecting the cylinder or app
• Work methodically through faults using diagnostic tools, product documentation and careful questioning to find the root cause

Emergency and priority situations

• Recognise and prioritise emergencies such as no hot water or a cylinder leak
• Provide calm, clear guidance to make the situation safe and arrange the right response or escalation
• Follow the correct process for urgent and safety-related issues without delay

Learning and knowledge

• Build and maintain a strong working knowledge of our solutions, keeping it current as the products evolve
• Contribute to knowledge-base articles, FAQs and troubleshooting guides
• Share recurring issues and product feedback with the wider Service and Engineering teams

What you will bring

Essential

• Sound technical aptitude and a genuine interest in learning how our solutions work
• Strong problem-solving and troubleshooting skills, with a logical, methodical approach
• A high standard of customer care, and the confidence to handle difficult customer conversations calmly and professionally
• Clear written and verbal communication
• Well organised, able to manage and prioritise a varied workload that includes urgent issues
• Comfortable using ticketing or CRM systems such as HubSpot

Desirable

• Experience in a technical support, helpdesk or contact centre environment
• Familiarity with heating, hot water, heat pump, IoT or connected home products
• Understanding of home networking and connectivity troubleshooting

What is on offer

Wellbeing

• Benenden Healthcare plan and Health Cash Plan
• Employee Assistance Programme with access to free counselling and advice
• Cycle to Work scheme
• Free on-site parking

Financial

• Pension contributions of 5% on basic salary via salary exchange
• Income protection
• Share options potential, not guaranteed and subject to scheme rules
• Discount scheme on everyday purchases including shopping, holidays and gym membership

Training and development

• Training, and career development opportunities that come with a scale-up in a phase of rapid growth

Leave and flexible working

• 33 days holiday including public holidays, plus up to 5 days unpaid leave
• Flexible working policy
• Enhanced maternity and paternity
• One paid volunteering day per year

Some benefits are available on successful completion of your probationary period. See the staff handbook for details.

Additional information

Our recruitment process typically includes a profile review, a Teams interview, an assessment relevant to the role, and a face-to-face interview at our Oxfordshire HQ.

We are committed to building a diverse and inclusive workplace where everyone can do their best work. We welcome applications from people of all backgrounds and are happy to discuss any reasonable adjustments you may need during the recruitment process.

You may have experience of the following: Technical Support Advisor, Customer Support Agent, Technical Support Executive, Helpdesk Advisor, IT Support Agent, Customer Service Technical Advisor, Product Support Specialist, Service Desk Agent, Technical Customer Service Advisor, First Line Support Agent