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Senior Engineer / Section Engineer

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Onsite

Senior Engineer / Section Engineer

Costain

Senior Engineer / Section Engineer

Skills

Testing & QASupply Chain

25 days ago

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Important information


Contract type:

Permanent, Freelance / Contract

Location:

Marlborough SN8, UK

Work mode:

Onsite

Published on:

2 October 2026

What they need


Costain are working with Thames Water on a variety of water and wastewater projects and have fantastic opportunities for individuals to join our growing AMP8 delivery team, working predominantly across the Thames Valley and Thames South regions. There is a mix of projects ranging from smaller capital maintenance to large civil new build schemes.

We have an exciting opportunity for a Senior Engineer to join our Thames Water Framework. The purpose of a Senior Engineer is to oversee the execution of a specific section of a project, ensuring that all engineering tasks are completed to the required standards.

We are also interested in experienced Section Engineers.

This will be working across Marlborough, Gloucestershire and Oxfordshire.

At Costain, we believe diverse perspectives drive innovation. If you’re passionate about making a positive impact and think you can bring value to our team, we’d love to hear from you—even if you don’t tick every box. Your unique skills and experiences could be exactly what we need.

#LI-BM1

Responsibilities: Responsibilities

Communicate with Key Alliance partners and subcontractors
Take a lead in the establishment of the site and overall delivery of the project supporting the team & management as required.
Work effectively and efficiently alongside other members of the delivery team to support them in their role.
Effective engagement with stakeholders and 3rd parties. (land owners etc)
Keep accurate site records identifying any variances or issues and provided feedback to line managers.
Assist in project design co-ordination and distribution of documentation relevant to the site works.
Hold specific site based responsibilities as determined at project level, typically permits to work.
Be willing to hold site based co-ordination and subcontract manager roles relevant to your knowledge & experience as determined at site level, or as defined by the project management team.
Support other team members to ensure liaison between the different site disciplines and subcontract managers is free flowing and works are co-ordinated effectively.
Assist & support in the preparation, implementation & maintaining of formal QA / QC documentation on site including Inspection Test Plans and Check sheets.
Assist & support in the completion & co-ordination of regular mandatory & regulatory inspections for the project as directed, including SHE, LOLER, PUWER etc.
Assist in development, monitor & report on 5-6 week look ahead schedules inclusive of the supply chain and other stakeholders (on APHEX).
As required, prepare or approve and then implement Risk Assessments & Method Statements for directly resourced works.
Plan and procure materials & plant as required for works on site as required and ensure efficient use / stocks are maintained provide feedback and identification of any issues in a timely manner.
Manage direct reports, reviewing their performance, duties and support their development
Ensure that all engineering, measurement, sub-contract works are undertaken in accordance with the conditions and requirements of the contract.
Promote continuous improvement in everything undertaken and share good practice within the project, back to Costain centre and to the wider industry.
Attend / arrange weekly co-ordination, progress and programme / resource meetings as required
Monitor and drive SHE performance, ensuring all health and safety regulations are adhered to
Play a key role in the management and communication

Knowledge, Skills, and Experience

Essentials

Understanding of engineering principles
Technical knowledge of construction techniques and best practices.
Some civil / MEICA construction experience.
Design Management experience
Frontline and project supporting roles available.
Computer competence (MS Word, Excel, Document control system).
Water or similar background

Desirable

Temporary works coordination experience, confined space working, lifting operations, scaffold management.
Civils and Commissioning phase experience

  • Ability to take charge of section of large site or sole responsibility for smaller site

Qualifications: Essential

Degree/HNC level qualification in a relevant engineering subject
Relevant CSCS Card
Training in Health & Safety and Environmental management
Current Driving Licence

Desirable

Hold or be working towards APM Introductory Certification

  • Vocational Training (successful experience at engineer level)

About us: Costain helps to improve people’s lives with integrated, leading edge, smart infrastructure solutions across the UK’s energy, water, transportation and defence markets. We help our clients improve their business performance by increasing capacity, improving customer service, safeguarding security, enhancing resilience, decarbonising and delivering increased efficiency. Our vision is to be the UK’s leading smart infrastructure solutions company. We will achieve this by focusing on blue chip clients whose major spending plans are underpinned by strategic national needs, regulatory commitments, legislation or essential performance requirements. We offer our clients leading edge solutions that are digitally optimised through the following five services which cover the whole lifecycle of their assets: future-shaping strategic consultancy; consultancy and advisory; digital technology solutions; asset optimisation and complex programme delivery. Our culture and values underpin everything we do.

Costain appreciate the time and effort taken when applying for one of our positions but, due to the high volume of responses, we are unable to provide individual feedback on candidates at application phase.

We do share individual feedback following an interview .

A Disability Confident employer will generally offer an interview to any applicant that disclose they have a disability and meets the minimum criteria for the job as defined by the employer.

It is important to note that in certain recruitment situations such as high-volume, seasonal and high-peak times, the employer may wish to limit the overall numbers of interviews offered to both disabled people and non-disabled people.

For more details please go to the Disability Confident website:
https://www.gov.uk/government/collections/disability-confident-campaign

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