Who is Size?
Launched in 2009 as a small construction venture between two friends, Size Group brings together the vital elements of property from the construction of luxury buildings through to the maintenance and management of a property portfolio.
We now seek a Commercial Manager to join our team on a permanent, full-time basis
The Benefits
This is a great opportunity for a Commercial Manager with a construction background to join our forward-thinking and collaborative organisation.
We offer:
Competitive salary
Auto enrolment to company pension scheme (opt-out option available)
Private medical insurance
Critical illness insurance
26 days annual leave
Travel expenses for site-based staff
You’ll play a pivotal role in delivering high-end, prime residential projects, making this an ideal setting to deepen your experience and accelerate your professional growth.
The Culture
At Size Group our values underpin who we are. They form an important benchmark for everyone – collectively and individually. We are:
Empathetic - People-driven and focused
Tenacious - Relentless pursuit of the highest standards
Integrity - Integrity earns trust. Trust builds relationships
Entrepreneurial - Self-starters that push beyond the obvious
We boast a culture that is focused on training and development, career paths and internal progression. What’s more, we’re committed to our employees and offer a range of benefits to support your lifestyle both in and out of the workplace.
The Role
As a Commercial Manager, you will lead the commercial function across major projects, ensuring robust financial control, strategic oversight, and effective risk management from pre-construction through to final account.
Reporting to the Surveying Director, you will take full ownership of the commercial performance of large-scale and complex projects, with a particular focus on structural works. You will play a key role in shaping commercial strategy, driving value, and ensuring best-in-class contract management across all stages of delivery.
Working closely with senior project stakeholders, clients, and supply chain partners, you will provide leadership and direction to the commercial team, ensuring consistency, accuracy, and high performance across all commercial activities.
Additionally, you will:
Lead the commercial strategy and financial management of large-scale, high-value projects, with a strong emphasis on structural packages
Oversee cost planning, budgeting, forecasting, and detailed financial reporting at project and portfolio level
Take ultimate responsibility for subcontract procurement strategy, negotiation, and commercial management, particularly across complex structural trades
Manage and mitigate commercial risk, driving proactive decision-making and value engineering opportunities
Oversee the preparation and review of CVRs, cash flow forecasts, and final accounts
Ensure robust administration of JCT contracts and compliance with contractual obligations
Lead, mentor, and develop a team of Quantity Surveyors and Senior Quantity Surveyors
Build and maintain strong relationships with key clients, consultants, and stakeholders, acting as a trusted commercial advisor
About You
To be considered for this Commercial Manager role, you will have:
Extensive experience (typically 10+ years) in quantity surveying/commercial management within a main contractor environment
Proven experience leading the commercial function on large-scale, complex construction projects, with significant exposure to structural works
A strong track record in the prime residential sector, with experience delivering high-value schemes
In-depth knowledge and application of JCT contract forms and commercial best practice
Strong leadership capability, with experience managing and developing high-performing commercial teams
Excellent commercial acumen, with the ability to influence, negotiate, and drive performance at senior levels
A proactive and strategic mindset, with the confidence to challenge and add value
A degree or equivalent in Quantity Surveying or a related discipline
How to Apply
If your skill set matches the above and the prospect of helping deliver some of the country’s finest projects appeals to you, .
Your application will be processed by Size Group, and interviews will be conducted on a rolling basis as suitable candidates apply. We therefore encourage you to submit ASAP to avoid missing out!
