Costain Group
Construction Manager

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CMDP, a Joint Venture between Costain and MWHT, have been selected by Southern Water to deliver essential infrastructure solutions for its next AMP8 investment programme. The award is for an initial seven-year term worth at least £500m to Costain, with an option to extend by up to five years.
The strategic delivery partner framework will deliver upgrades to water and wastewater assets, including treatment sites, pumping stations and reservoirs, during Asset Management Period 8 (AMP8) and beyond. Southern Water expects that its AMP8 programme, which runs from 2025 to 2030, will be the largest it has ever undertaken.
We are looking for a Construction Manager to join our growing team.
RESPONSIBILITIES
Responsibilities
- Develop scheme Health, Safety and Environmental Management Plan (HASEMP)
- To ensure works are constructed defect free
- Ensure all works are undertaken with due regard to the needs of the local population within the immediate vicinity of the works and the travelling public as a whole
- Manage, supervise and mentor the site team as appropriate
- Ensure only adequately trained and experienced operatives are engaged on site to deliver the scheme
- Adopt, maintain and promote cost conscious management through efficient use of all resources
- Ensure realistic scheme programmes are prepared, reviewed and updated
- Ensure method statements and risk assessments are prepared, reviewed, briefed and updated
- Deliver site inductions and regular tool box talk briefings to all site personnel
- Ensure all plant and equipment used is fit for purpose, only operated by suitably trained personnel and regularly inspected
- Ensure all records for measurement and payment purposes are prepared promptly, in appropriate form
- Keep line management apprised of potential problems and opportunities
- Ensure all “as constructed” records are provided to the CDMC for inclusion within the Health and Safety File in a timely manner following scheme completion
- Management of temporary coordination
Reasons to use Rodeo
I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?
Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.
Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.
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Graduate Consultant — 2026 Scheme
Why you're a good match
StrongYour economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.
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Why you're a good match
You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.
Experience fit
Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.
Only hits
No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.
Knowledge, Skills, and Experience
Essential
- Recognised Civil Engineering/Site Management Qualifications
- Degree in Civil Engineering/Construction Management
- Health, Safety and Environmental Management (IOSH or Construction Managers Safety Certificate
- Valid Driving Licence
- CSCS Site Manager (Min)
- First Aid at Work
- Understanding of Engineering Principles
- Incorporated or Chartered status
#LI-BM1
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.


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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
CMDP is a joint venture between Costain and MWHT and delivers a range of schemes to maintain and improve Southern Water’s water supply and wastewater treatment works in the eastern half of its region (Kent & Sussex).
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