Plant Supervisor (RMX)

Tarmac Trading Limited; Cardiff; On-site; GBP 45,000 - 60,000; Full time

Benefits offered by this job

Bonus scheme

Enhanced holiday entitlement

Contributory pension scheme

Employee discounts via Reward site

Employee Assistance Programme

Job summary

Tarmac Trading Limited is recruiting a Plant Supervisor - Readymix for the Taffs Well Concrete Plant near Cardiff. The role focuses on leading RMX operations, enforcing safety standards, managing budgets, and driving performance with contractors and the workforce.

The ideal candidate has supervisory experience in heavy industry, knowledge of Health and Safety policies, and the ability to improve process efficiency. Training will be provided for common systems and safety practices.

Qualifications

• Strong knowledge of Health, Safety and Environmental policies.
• Full knowledge of Risk Assessments and Safe System of Work.
• Working knowledge of production processes and associated policies.

Responsibilities

• Lead RMX plant operations and supervise the RMX team.
• Deliver toolbox talks and manage contractors on site.
• Oversee daily production, costs, and stock control.

Skills

People management

Communication skills

Time management

Team motivation

Change leadership

Education

NVQ in fixed/mobile plant operations

IOSH Managing Safely (training)

Job description

Job IntroductionPLANT SUPERVISOR (READYMIX) – TAFFS WELLAre you an experienced Supervisor looking for a new challenge? Are you from within a manufacturing, industrial or similar ‘heavy’ industry environment; with exceptional people and customer facing skills? If this sounds like you then please read on as this could just be the role for you.We are currently recruiting for a Plant Supervisor - Readymix to join and lead our fantastic Readymix ‘RMX’ team at our Tarmac Taffs Well Concrete Plant near Cardiff. As well as Taffs Well and Cardiff this role is easily accessible from Caerphilly, Pontypridd, Porth, Aberdare, Blackwood, Cowbridge, Penarth, Newport, Cwmbran and the surrounding areas.Due to the nature of the role we are open to accepting applications from candidates who can offer strong supervisory / management experience from within a similar ‘heavy’ industry, as product training will be given to the successful candidate.Here at Tarmac, we are working hard to create a dynamic and inclusive environment and it’s important that our people come from a variety of different backgrounds.Main ResponsibilitiesReporting to the Production Manager the role of Plant Supervisor - Readymix will manage and be accountable for the RMX operations on our small Readymix / RMX plant. Safety and operational standards are the fundamentals of the role of Plant Supervisor with cost control, people management of colleagues and Contractors, delivery to customer needs and performance improvement being key. Managing plant compliance with business policies and procedures and ensuring that legislative compliance is also a strong aspect of the role.Key Tasks and Responsibilities of the Plant Supervisor - Readymix:Leading and active supervisory of the RMX operational plantDelivery of toolbox talks - contractorsManage all aspects of daily production including operational costs and control stocksEfficient manufacture of concrete, controlling standard deviation and cement contentsDrive operational performance through KPI’sTimely resolution of queries assigned to the sectorTake responsibility for their own safety and that of contractors, customers and business partnersMaintain site housekeeping to a high standardBatch concrete to meet customer needs whilst meeting internal quality requirementsResponsible for the budget in relation to the plants they are responsible for, these being both fixed and variable costsThe role is a DAYS role with overtime available to meet with the Plant’s production needsThe Ideal CandidateThe ideal candidate for the role of Plant Supervisor - Readymix will already have experience in plant operations and preferably within a Ready Mix / Aggregates environment with a working knowledge of production processes.Suitable candidates for the role of Plant Supervisor - Readymix will also have:Working knowledge of Health, Safety and Environmental policiesFull knowledge of Risk Assessments and Safe System of Work SystemsWorking knowledge of production processes and Health, Safety and Environmental policiesIOSH Managing Safely (preferred but we will train)NVQ in fixed and mobile plant operations (preferred but we will train)Able to actively identify and implement site and process improvementsAble to look for opportunities to identify customer needsStrong communication skills and ability to feed opportunities into customer services / salesConfidence to effectively manage change and multitaskEvidence good time management skillsEnjoy working as part of a team and efficiently motivate othersWhy TarmacAt Tarmac, ‘who you are’ matters. We want to get to know you. We are working hard to create a dynamic and inclusive environment and it’s important that our people come from a variety of different backgrounds. If you share our values and are proud of a job well done, collaborative in working well with others and ambitious to make things better, then have a read of what we have on offer.We don't just offer a job, we offer a career.Alongside this role, you'll have access to industry-leading rewards, development opportunities, and a culture that puts people first, including:Bonus schemeEnhanced holiday entitlementContributory pension schemeAccess to the Tarmac Reward website with discounts on retailers, holidays, etc.Access to our Employee Assistance helpline for free and confidential adviceAccess to join our Employee Communities (employee networks) we currently have nine communities inc. (REACH) Religious, Ethnic, Cultural Heritage, LGBTQ+, Parents & carers, Ability, Wellbeing, Female voice and menopauseTraining and development opportunitiesTarmac is committed to being a Forces‑friendly employer. If you’re coming from a military background, we’ll support your transition and help you build a successful career with us.We’re proud to be part of CRH, and even prouder to be an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for everyone. If you need any reasonable adjustments during the recruitment process, just let us know, we’re here to support you.Ready to build your future?Click ‘Apply’ to get started. Please note: we sometimes close roles early due to high interest, so don’t wait too long!@tarmac #tarmac #tarmaccareers #readymix #reliefsupervisor #reliefplantsupervisor #plantsupervisor #supervisor #plantjobs #concrete #concretejobs #rmx #supervisorjobs #supervisor #readymixsupervisor #manager #LI-RE1Tarmac Trading LimitedTarmac Trading Limited TarmacSalary Excellent Salary + Overtime + Bonus + BenefitsFrequency AnnualJob Reference tarmac/TP/232604/8108Contract Type PermanentClosing Date 15 September, 2026Job Category Operations, Quarrying and ProductionBusiness Unit South West & WalesLocation Cardiff, United KingdomPosted on 14 August, 2026