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Mechanical Engineer
Location: Caldicot, South Wales Function: Engineering Design
Are you a mechanically minded engineer who enjoys turning complex technical requirements into practical, buildable solutions?
We’re looking for a Mechanical Engineer to join our Engineering Design team, supporting the delivery of advanced water treatment and electrochlorination systems. This is a role for someone who thrives on technical depth, cross-functional collaboration, and seeing designs through from enquiry to commissioning.
The Role
Working under the direction of the Principal Mechanical Engineer, you’ll play a key role in interpreting client specifications and translating them into detailed, high-quality engineering designs.
You’ll be involved throughout the full project lifecycle — from enquiry and proposal support through to execution and commissioning — ensuring our systems are technically robust, compliant, and aligned to client and regulatory standards.
What You’ll Be Responsible For
- Interpreting and digesting customer technical requirements and contract documentation
- Producing process calculations, pump sizing calculations and hydraulic designs
- Creating and defining PFDs and P&IDs
- Producing equipment data sheets, specifications, and schedules
- Selecting and detailing valves, instruments and associated equipment
- Supporting plant layout development, including:
- Pipework system design
- Chemical storage and transfer systems
- Compressed air treatment systems
- Pneumatic control system designs
- Reviewing supplier proposals and carrying out technical appraisals
- Supporting proposal scope preparation and engaging with clients pre- and post-contract
- Reviewing Process Control Philosophies and Functional Design Specifications
- Resolving design issues during manufacture, installation and commissioning
- Ensuring compliance with ISO 9001:2015 and internal QA procedures
- Supporting CDM responsibilities through hazard elimination and risk mitigation in design
- Contributing to document control and design review processes
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You’ll work closely with Mechanical Designers, Electrical Engineers, Procurement, Production, QA, Project Managers and global colleagues — as well as external clients, vendors and inspectors.
What We’re Looking For
Essential
- HNC or HND in Mechanical Engineering (Degree desirable)
- Strong ability to interpret complex technical specifications and diagrams
- Confident representing the company professionally with customers
- Strong problem-solving skills and creative thinking
- Good understanding of manufacturing and production processes
- Commercial awareness and understanding of engineering costs
- High attention to detail
- Strong communication and reporting skills
- Well organised with the ability to prioritise effectively
- Good level of computer literacy
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Desirable
- Experience with electrochlorination packages or chemical process equipment
- Structural steelwork construction and welding knowledge
- Knowledge of ATEX, IECEx and HAZOP
- Familiarity with major petrochemical specifications (e.g. BP, Shell)
- AutoCAD experience
Why Join Us?
This Role Offers The Opportunity To
- Work on technically challenging water treatment systems
- Be involved from concept through to commissioning
- Develop specialist knowledge in electrochlorination and water technologies
- Influence design standards and continuous improvement
- Collaborate across disciplines in a quality-driven engineering environment
If you’re motivated by solving complex engineering problems and want to contribute to high-impact water technology solutions, we’d love to hear from you.
Join the global Xylem team to be a part of innovative technology solutions transforming water usage, conservation, and re-use. Our products impact public utilities, industrial sectors, residential areas, and commercial buildings, with a commitment to providing smart metering, network technologies, and advanced analytics for water, electric, and gas utilities. Partner with us in creating a world where water challenges are met with ingenuity and dedication; where we recognize the power of inclusion and belonging in driving innovation and allowing us to compete more effectively around the world.
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