Project Manager; Retrofit and Construction

Position: Project Manager (Retrofit and Construction)

Project Manager (Retrofit and Construction)

Location: Hybrid – Average of 2 days in Cardiff office

Contract: Permanent, Full‑time (flexible hours/patterns available)

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

Closing date: 16 January 2026

About Sero

Sero was founded to make a connection between homes and energy and to use technology to make both this easier and smarter together. We do this to save our customers money and time, while also saving our planet. To tackle the Climate Emergency, we deliver innovative energy and retrofit solutions that reduce the carbon footprint of homes  work closely with social housing providers, local authorities and delivery partners to help them understand what their buildings need to achieve net‑zero.

How

You Will Help

As a Project Manager, you will 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 will 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 will be the primary point of contact for key stakeholders and will balance customer expectations with Sero's operational and commercial goals.

What We’ll Be Asking You To Do Project Management and Delivery

• Oversee the full lifecycle of key retrofit projects, ensuring on‑time, on‑budget delivery and high 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.
• Own 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 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, sub‑contracts 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 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

• Essential Proven experience in project management within construction, social housing or energy retrofit sectors.
• Degree‑level qualification in an aligned discipline (or equivalent experience).
• Commercial experience developing and delivering projects.
• Background in Quantity Surveying, Procurement, Contract Management or equivalent commercial training/experience.
• Technical experience in large‑scale deployment of Solar PV and battery storage systems.
• Stakeholder management and communication skills.
• Commercial awareness with experience owning budgets and forecasts.
• Advanced Excel proficiency (pivot tables, power queries,…