Assistant Commercial Manager

Assistant Commercial Manager Location: London - Palestra/Pier Walk Contract: 3-month with possible extension Rate: Up to £361.17 per day Umbrella - Inside IR35 Start Date: ASAP Working Pattern: Hybrid - 2 to 3 days…

Pay rate £320 – £361/day
Contract type Contract
Posted 8 October 2026

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About this contract

Assistant Commercial Manager

Location: London - Palestra/Pier Walk
Contract: 3-month with possible extension
Rate: Up to £361.17 per day Umbrella - Inside IR35
Start Date: ASAP
Working Pattern: Hybrid - 2 to 3 days onsite a week

We are currently recruiting for a number of Assistant Commercial Manager opportunities across London, supporting a range of major infrastructure, facilities management, engineering and asset-based contracts.

These roles offer the opportunity to work within established commercial teams, supporting the management and financial control of live contracts across a variety of environments. Rail experience is ideal but not essential, and candidates from other sectors with strong commercial and contract management backgrounds are encouraged to apply.

The Role

As an Assistant Commercial Manager, you will provide commercial and contract support across a portfolio of live contracts, working closely with Commercial Managers and key internal and external stakeholders.

The roles are primarily focused on post-contract commercial management, although candidates with broader end-to-end commercial experience covering both pre- and post-contract activity are welcome.

Depending on the assignment, you may work across areas including facilities management, engineering, maintenance, infrastructure, mechanical & electrical, building services and other contracted services.

Key Responsibilities

Supporting the commercial management of multiple live contracts
Managing and reviewing payment applications and supplier submissions
Supporting the issuing of payment notices and maintaining commercial records
Raising and managing purchase orders
Monitoring budgets, expenditure and financial forecasts
Tracking actual spend against agreed budgets
Analysing financial and operational reports
Maintaining accurate contract and commercial information across internal systems
Preparing commercial reports, updates and meeting minutes
Responding to commercial and contractual queries
Reviewing contract documentation and interpreting scope and contractual requirements
Working closely with suppliers, contractors and internal stakeholders
Supporting Commercial Managers with the day-to-day administration and management of contracts

About You

We are looking for commercially minded candidates who are comfortable working with live contracts and financial information.

Essential Experience

Strong post-contract commercial or contract management experience
Experience working with live contracts and contractual documentation
Strong Excel skills, including financial tracking, reporting and analysis
Excellent attention to detail and analytical ability
Confidence dealing with commercial queries and interpreting contract requirements
Strong written and verbal communication skills
Ability to quickly learn new systems and processes

Desirable Experience

Experience within infrastructure, engineering, construction, FM, maintenance or a similar contracted environment
Experience working across multiple contracts or suppliers
SAP, Ariba or similar commercial/procurement systems
Experience within a large organisation or complex stakeholder environment
Rail, transport or public-sector experience

Pre & Post-Contract Experience

Candidates with end-to-end commercial experience across both pre- and post-contract stages are encouraged to apply.

However, for these positions, hands-on post-contract experience is essential. Candidates whose experience is limited to procurement, tendering or pre-contract activity are unlikely to be suitable.

Qualifications

Commercial, contract management or professional qualifications such as RICS, CIPS or equivalent would be advantageous but are not mandatory. Practical commercial experience will be valued highly.

Disclaimer:

This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change

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