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🟒 Actively Hiring Β· Posted 25d ago ⏳ Closes in 66 days UK Corridor πŸ›‘οΈ UK Work Eligibility 🏒 Company - Private

Site Agent - based in Treforest or Aberdare

🏒 Tarmac β€’ πŸ“ Treforest, Wales β€’ πŸ•’ Sep 14, 2026
Salary Range
Salary Disclosed on Application
Full Benefits Package

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OP-VERIF-D3EBD423 βœ“ Passed Inspection

This vacancy has been independently reviewed by the OppaJob Transatlantic Career Intelligence Desk to confirm authentic direct employer recruiting, verify compensation transparency, and eliminate applicant processing fees.

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Corporate Registration Verified UK Companies House registration standing active
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Prevailing Wage Benchmark UK National Minimum Wage & Equality Act 2010 aligned
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Corridor Right-to-Work Match UK Work Eligibility

Transatlantic Cost of Living & Purchasing Power Benchmark

Verified Analytics
Location Base
Treforest, Wales
Tier-1 UK Economic Zone
Est. Take-Home Pay
68% - 74% (After PAYE & NI)
Single tax filer baseline
Transatlantic Parity
1.0 GBP β‰ˆ $1.28 USD Living Standard
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Position Overview & Specifications

Job Introduction

Founded in 1968, Griffiths is one of the leading civil engineering and rail contractors working throughout Wales, the midlands and south-west England. With an annual turnover of circa Β£225m our 1000+ directly employed, well-trained, dedicated and highly competent workforce deliver client solutions which includes Welsh Government, Transport for Wales, Network Rail, Highways England, local authorities, Utility Companies and selected private sector organisations.

In 2018, Griffiths became part of Tarmac, the UK’s leading sustainable building materials business and a wholly owned subsidiary of CRH. Griffiths has over 1,000 employees operating across 100 sites or schemes at any given time.

We're now recruiting for a Site Agent for Core Valley Lines to be based in either Treforest or Aberdare. You will be responsible for the safe execution of projects from construction phase mobilisation to hand back, in accordance with company policies, procedures, and Network Rail Standards. You'll also be responsible for the timely and commercially advantageous delivery of assigned projects. Typical projects are new stations, platform extensions, new footbridges and lineside civils.

Role Responsibility

The Site Agent will be responsible a variety of tasks including:

  • Leading the site team in the planning and delivery of each project.

  • Health and safety leadership to the assigned operational delivery site team

  • Ensuring that site management team rigorously adhere to Network Rail's Life Saving Rules

  • Ensuring compliance with all relevant HSE legislation and NR Standards

  • Promoting and implementing sustainable business objectives

  • Achieving gross site margin target on allocated schemes as directed by the contracts manager

  • Compliance with all relevant NR Standards, AGC Procedures and HSE guidance

  • Ensuring sufficient and competent resource is in place for the delivery of the project and ensuring the project objectives are communicated to the site team

  • Developing and maintaining a construction programme and ensuring works are communicated and delivered against milestones.

  • Identifying, managing and controlling associated programme risks and communicating this as required

  • Promoting and maintaining effective client and stakeholder relationships to protect and enhance the company’s reputation to support repeat business

  • Upholding the core company values, inspiring and encouraging the same throughout the team

The Ideal Candidate

To be successful in this role it is likely the ideal candidate will have a relevant Degree or HND in civil engineering or similar or be in possession of relevant equivalent experience. You will have previous experience of leading railway sites in a supervisory, engineering or leadership capacity.

In addition you'll be Personal Track Safety certificated and have proven leadership skills.

You will also be in possession of an SMSTS and have a relevant CSCS card. NVQ Level 6 or working towards is highly desirable.

Why Tarmac

We offer an extensive range of career development opportunities and industry-leading rewards, incentives and benefits.

Some of the range of benefits on offer to employees include:

  • Full study Package
  • Enhanced holiday entitlement
  • Contributory pension scheme
  • Access to the Tarmac Reward website with discounts on retailers, holidays, etc.
  • Access to our Employee Assistance helpline for free and confidential advice.
  • Training and development opportunities

Candidate Selection & Onboarding Process

1

Application & Resume Screening

Submit your tailored CV/Resume directly to the talent acquisition portal.

2

Technical & Competency Interviews

Virtual interviews with the hiring manager and multidisciplinary team.

3

Formal Offer & Benefits Negotiation

Written agreement outlining compensation, equity, retirement vesting, and relocation allowances.

4

Onboarding & Corporate Integration

Equipment provisioning, team orientation, and commencement of duties.

United Kingdom Right to Work & Skilled Worker Visa Guide

Corridor Intelligence

Employment in the United Kingdom requires legal Right to Work verified under the Home Office Points-Based Immigration System:

πŸ‡¬πŸ‡§ Skilled Worker Visa (Tier 2)

Sponsoring employers must hold an active Home Office A-rated Sponsor License and assign a valid Certificate of Sponsorship (CoS). Role must meet the general minimum salary threshold (Β£38,700) or occupation going rate.

πŸ›οΈ Settlement (ILR) Pathway

Continuous employment under Skilled Worker status establishes eligibility for Indefinite Leave to Remain (ILR) after 5 continuous years, leading to British Citizenship.

βš–οΈ Official regulatory reference: UK Visas and Immigration (UKVI) & Home Office Sponsor Register.

Candidate Preparation Blueprint: Construction

Recruitment Insights

Based on transatlantic hiring benchmarks for Site Agent - based in Treforest or Aberdare roles across Tarmac's corporate sector, successful applicants typically excel across three core dimensions:

1. Domain Competency

Demonstrated portfolio evidence, architecture/system design case studies, or validated professional certifications directly applicable to Construction.

2. Behavioral & Leadership

STAR method competency responses highlighting cross-functional leadership, conflict resolution, and delivering measurable enterprise ROI under tight timelines.

3. Compensation Alignment

Total compensation expectation aligned within the benchmarked Salary Disclosed on Application bracket, including retirement vesting and health parity.

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Hiring Organization
Tarmac

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Location: Treforest, Wales
Eligibility: UK Work Eligibility
Schedule: Company - Private
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