Location: Hybrid - Average of 2 days in Cardiff office

Salary: £45,000 - £55,000 per annum (depending on experience)

Contract: Permanent. Full-time and flexible hours/patterns available - We understand that life is more than just work, so we're happy to discuss flexible working arrangements around childcare and other life-balance commitments.

The closing date is 16 January 2026. We'll then hold short 20-30 minute Teams chats with shortlisted candidates to answer any questions about the role, before inviting successful applicants to a competency-based interview at our Cardiff office. We're happy to make adjustments at any stage, just let us know.

About Sero:

Sero was founded to make a connection between homes and energy and to use technology to make both these easier and smarter together. We do this to save our customers money and time for them, but we also do it to save our planet.

To tackle the Climate Emergency, we deliver innovative energy and retrofit solutions that reduce the carbon footprint of homes at scale. We work closely with social housing providers, local authorities, and delivery partners to help them understand what their buildings need to achieve net-zero.

Your contribution will be key to the team's success as we continue to scale our impact. We're looking for someone who shares our passion for sustainability and wants to play a hands-on role in delivering meaningful change.

How you will help:

We're looking for a Project Manager to lead the delivery of a large-scale Solar PV and battery retrofit programme. This role has full accountability for project delivery, commercial performance, and stakeholder management.

You'll manage the full project lifecycle, from mobilisation and planning through to installation, commissioning, and close-out - working closely with social landlord partners, consultants, and contractors to ensure projects are delivered safely, on time, within budget, and to a high standard.

You'll be the primary point of contact for key stakeholders and will balance customer expectations with Sero's operational and commercial goals. This is a fantastic opportunity for someone with experience in construction or renewable retrofit, ideally within the social housing sector.

What we'll be asking you to do:

Project Management and Delivery

• Oversee the full lifecycle of key retrofit projects, ensuring delivery is on time, within budget, and to the highest quality standards
• Act as the primary point of contact for social landlord partners, consultants, and contractors
• Develop and manage detailed project plans, timelines, and risk registers
• Manage project budgets and financial forecasts, tracking variances and performance
• Identify, assess, and manage project and commercial risks and opportunities
• Take ownership of project issues, resolving challenges proactively
• Provide regular progress updates and reporting to internal stakeholders and partners
• Work collaboratively across Sero teams to ensure smooth project delivery

Technical Oversight and Coordination

• Oversee the coordination and delivery of Solar PV and battery retrofit measures
• Liaise with technical specialists and contractors to ensure safe, compliant delivery
• Ensure all works meet relevant electrical, building, and retrofit standards
• Monitor installation quality and performance, coordinating inspections where required
• Maintain strong awareness of Health & Safety requirements (NEBOSH desirable)

Commercial Management

• Review, negotiate, and manage contracts, subcontracts, and commercial agreements
• Ensure contract obligations are clearly understood, communicated, and delivered
• Monitor variations, change control, and commercial claims
• Develop and manage project budgets, forecasts, and cost controls
• Track project financials, ensuring profitability and cash flow targets are met
• Provide commercial input into tendering and bid processes
• Manage supplier and contractor relationships to ensure performance and value for money

Process, Compliance and Improvement

• Ensure compliance with all legal, contractual, and regulatory requirements
• Maintain accurate and auditable project documentation and records
• Support audits and internal reviews
• Identify opportunities to improve delivery processes and operational efficiency
• Capture lessons learned and contribute to continuous improvement
• Provide flexible, hands-on support to the wider project team when required

To Hit the Ground Running:

We're looking for someone with the following skills and experience:

Essential

• Proven experience in project management within construction, social housing, or energy retrofit sectors.
• Degree- level qualification in an aligned disciple (or equivalent experience)
• Commercial experience developing and delivering projects
• Able to demonstrate a background of Quantity Surveying, Procurement, Contract Management, or equivalent commercial training/experience
• Technical experience in the large-scale deployment of Solar PV and battery storage systems.
• Strong stakeholder management and communication skills
• Strong commercial awareness with experience owning budgets and forecasts
• Advanced Excel proficiency (e.g., pivot tables, power queries, and financial modelling).
• Ability to remain adaptable in a fast-moving environment.
• A genuine passion for sustainability and enabling net-zero outcomes

Desirable (but not essential):

• Professional accreditation such as RICS or CIOB
• Relevant project management qualifications (e.g., PRINCE2, PMP, Agile PM).
• Experience working within the social housing sector.
• Experience with grant-funded retrofit programmes (e.g. SHDF, ECO4)
• Understanding of planned retrofit and renewable energy funding mechanisms
• Knowledge of building regulations and planning requirements for renewable energy projects
• NEBOSH or other Health and Safety qualification

More Information:

Diversity: We actively look to reflect the diversity of the world around us and welcome applications from everyone. If you need any adjustments to the application or interview process, please let us know.

Working Hours: We consider full-time to be 37.5 hours per week between 7am and 7pm Monday to Friday but this could also be a part-time role if it works best for you. How you wish to make a working pattern is up to you, as long as you're meeting the needs of the role. We think work should suit your lifestyle, so we welcome you to work when you can be most efficient.

We'd like some of your working hours to be coordinated with other team members and stakeholders to ensure we're being efficient and communicating effectively,

Location: We have an office based in Cardiff and would expect you in the office on average 3 times per week.

Salary: We're budgeting between £45,000 - £55,000 per year for a full-time person in this role, with the offered salary being based on previous experience. If the role is part-time, the salary will be adjusted accordingly based on the agreed hours.

Perks:

• You'll start with 27 days of annual leave to use as you wish, plus 8 bank holidays which will be pro-rata'd for the length of your contract.
• Private free healthcare with Bupa, with the option to add your family at our reduced rate.
• Salary sacrifice Pension with Royal London - for a 3% contribution from you, you will receive 6% from Sero.
• Help@Hand Employee Assistance Programme which includes 25/7 access to a GP, mental health, financial and legal support.
• Our offices are in the City Centre (less than 10 mins from Cardiff train station) or if you prefer to drive, we have discounted NCP rates available.
• Generous family-friendly policies.
• Dog friendly.
• Volunteering: 8 hours for yourself, 8 hours to use as a team.
• Our office is always fully stocked with all the usual refreshments, tea, coffee, a variety of milks and a healthy fruit bowl.
• FOR Cardiff membership; access to exclusive discounts from Cardiff businesses like money off food and drink.
• Training and development support for everyone through our LMS and 10% protected professional development time each week

And... working with us, you'll be helping towards saving the planet

Interested? Ready to make a change?

If you think we're a match, get in touch! Send us your CV along with a cover letter explaining why you'd be the perfect fit for Sero.