Assistant Quantity Surveyor (13011)

Infrastructure – Thames Water Assistant Quantity Surveyor

The Opportunity

We are growing our team delivering AMP8 for Thames Water, to meet the greatly enlarged programme of works between 2025 and 2030. Tilbury Douglas have already been allocated circa £250m of projects in the delightful rural setting of the Cotswolds, Oxfordshire and Thames Valley regions. This is a great opportunity to join the team delivering on Treatment Works within this area. Our projects are a mix of civil, mechanical, electrical and IC scopes and range between £2.5m to £25m in size, several of which will be on sites that we are completing AMP7 projects. This is an exciting time to join the Tilbury Douglas Infrastructure Division as we are delivering enlarged AMP8 programmes across the UK for several water companies. We are recruiting across all project disciplines including management, supervision, design, engineering, commercial, project controls and project services.

What you will be doing as Assistant Quantity Surveyor

• Assist with the timely preparation and submission of main contract payment applications and support cash collection, as well as assess subcontractor payment applications and issue Pay Less Notices where applicable.
• Assist in preparing draft subcontracts as delegated by the supervisor, including issuing enquiries, reviewing quotations and using company databases like Constructionline to pre‑screen subcontractors for quality and safety compliance.
• Support senior staff in monitoring subcontractor performance to ensure compliance with contractual obligations and project standards.
• Assist in pricing variations by thoroughly assessing cost impacts, including those resulting from design changes, to ensure all elements are accurately captured.
• Participate in recording delays and preparing extension of time requests, using programme knowledge and critical path methodology to assess impacts.
• Participate in the settlement of main contract final accounts.
• Assist senior staff in the compilation of data to monitor individual contract performance on a monthly and quarterly basis.
• Support the development of Trainee QS’s through supervision of allocated tasks, mentoring, and providing guidance to help build their technical and commercial skills.
• Work collaboratively with the site team to oversee plant allocation and utilisation, maintaining accurate plant records and supporting cost recovery.
• Assist in the preparation, procurement, and pricing of tender submissions, particularly for Early Contractor Involvement (ECI) projects.
• Assist in cost forecasting and the preparation of Cost Value Reconciliations (CVRs) to support accurate financial reporting and informed commercial decision‑making.
• Interpret and assess expenditure and cost reports produced from internal cost systems (e.g., ledgers) to support financial analysis.
• Help manage stakeholder expectations through clear communication on costs, variations, and project progress.
• Assist in submitting Early Warning Notices (EWNs) and preparing early warning assessments to help identify and manage potential project risks.

What we will need from you

• Ability to read a construction programme and relevance of the critical path.
• Understanding of H&S issues at work.
• Aware of dispute resolution procedures.
• Adept at understanding construction drawings and able to measure and take off accurately.
• Understanding of the inter‑relationship between bills, specifications, and drawings.
• Understanding of construction contracts in relation to projects and of the relevance of subcontract terms and conditions.
• Ability to assess and value minor changes/variations in compliance with contract terms.
• Basic knowledge of different industry contracts.
• Basic understanding of risk in construction process.
• Proficient in use of Microsoft packages e.g. Excel, Word & PowerPoint.
• Ability to communicate effectively with a range of people.
• Experience of working on a live project, undertaking measurement and valuation functions.
• Experience of managing low risk sub‑contractors.
• Experience of processing subcontract payments.
• Ability to organise and plan your workload.
• Working towards professional accreditation e.g. RICS, CIOB, ICES (desirable).
• Hold a relevant CSCS card.

Location

Mandatory to work 3/4 days on‑site (including Clearwater, Reading).

What we can offer you

• Competitive salary (to be discussed on application).
• Car allowance (to be discussed on application).
• 26 days annual leave (with the opportunity to buy or sell up to 3 days holiday).
• Private medical insurance for yourself (with the option to buy family cover).
• Life Assurance.
• Defined contribution pension scheme matched up to 8%.
• 2 days volunteering opportunities.
• Flexible and Agile working (dependent on your role).
• Employee Assistance Programme.
• Professional membership fees.
• Flexible Benefits scheme which includes the opportunity to purchase benefits such as: Critical illness insurance (with option to purchase for your partner), Dental Insurance, Travel insurance, Cycle to work scheme, Retail vouchers/payroll giving/activity pass for top leisure attractions.

Who we are

Tilbury Douglas is a leading UK building, infrastructure, engineering and fit‑out company. We deliver vital projects across a range of sectors including health, education, highways, justice, defence, aviation, water and environment. It is our people who make Tilbury Douglas a success. We believe our inclusive culture encourages new ways of thinking, enabling us to innovate whilst remaining resilient. We value and celebrate all individual differences and look forward to receiving your application. We are currently working towards Investors in Diversity accredited status.

Please note we do not have a sponsorship license. Please note that this role is subject to Baseline Personnel Security Standard (BPSS) clearance which includes identity, employment history, and criminal record checks. We look forward to receiving your application!