Costain Group PLC
Finance Assistant

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JOB DESCRIPTION
A finance assistant performs a range of administrative and financial tasks to support the finance or accounts team of an organisation. They support the finance department by ensuring the smooth operation of day-to-day financial processes.
For Internal Reference: Generic Job Description - FINI01 - Finance Assistant.pdf
Responsibilities
- To assist the Accounts function with site account tasks as required, to ensure accurate and timely records.
- Reconcile creditor accounts, fuel charges, purchase cards, and other similar administrative support duties.
- Recording, processing, and investigating invoice queries and ensuring a timely resolution.
- Communicate with internal and external stakeholders as required.
- Inputting cost journals in line with relevant procedures with appropriate approval and communication.
- Assist accounting team with month-end processes, ensuring accurate recording of costs.
- Process allocated staff expenses in accordance with the Costain policy.
Essential Knowledge, Skills, and Experience
- Ability to work well under pressure, solving problems in a calm and rational manner and always acting with integrity.
- Have clear written and oral communication skills.
- Is a good team player and demonstrates a positive ‘can do’ attitude.
- Keen to learn and to be challenged.
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.
Start with a chat, not a search bar
Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.
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.
See breakdownIt searches the market for you
Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.
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.
Desirable
- Experience of using EnterpriseOne (E1) or other accountancy software.
- Previous experience in an accounting or accounts assistant position.
- Computer competence (MS Word, Excel, document and finance management systems)
Essential Qualifications
- At least 9 GCSE's
- Relevant A-Levels or BTech qualifications
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.


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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 the application phase.
We do share individual feedback following an interview.
A Disability Confident employer will generally offer an interview to any applicant that discloses 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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