Mechanical Engineer

Xylem is a Fortune 500 global water solutions company dedicated to advancing sustainable impact and empowering the people who make water work every day. As a leading water technology company with 23,000 employees operating in over 150 countries, Xylem is at the forefront of addressing the world’s most critical water challenges.

Overview

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 role involves technical depth, cross-functional collaboration, and seeing designs through from enquiry to commissioning.

The Role

Under the direction of the Principal Mechanical Engineer, you’ll interpret client specifications and translate 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.

Responsibilities

• 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
• 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

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.

Qualifications

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

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.