Sr Supervisor CAD Gas Seals Engineer

John Crane, a business of Smiths Group, is a global leader in mission-critical flow control solutions for energy and process industries that enable efficient and sustainable operations. Our products include mechanical seals and systems, couplings, filtration systems, and predictive digital monitoring technologies.

We have a global network of more than 200 sites in over 50 countries and employ more than 6,000 people worldwide. We partner with our customers to help them keep their operations safe, reduce downtime, improve efficiency, and meet the latest environmental standards.

John Crane is part of Smiths Group. For over 170 years, Smiths has been pioneering progress by engineering for a better future. We serve millions of people every year, helping to create a safer, more efficient, productive, and better-connected world across four global markets: energy, security & defence, space & aerospace, and general industrial. Listed on the London Stock Exchange, Smiths employs approximately 16,000 colleagues in over 50 countries.

We currently have an exciting opportunity for a Senior Supervisor to join the Slough Team. This role is a key leadership position within the Gas Seal Engineering team, responsible for guiding and developing a global group of first‑fit engineers. As a technical expert, you will oversee day‑to‑day engineering activities, ensuring delivery against KPIs while fostering a culture of collaboration, accountability, and continuous improvement.

You will provide hands‑on leadership, mentoring both junior and senior engineers, managing workloads, and building technical capability across the team. The role also works closely with Commercial, Sales, and Operations, strengthening cross‑functional partnerships and supporting knowledge sharing, coaching, and technical training across wider engineering functions.

This role is based from our headquarters within Slough working Monday to Friday normal office hours.

John Crane is an equal opportunity employer. We celebrate diversity and are committed to crafting an inclusive environment for all employees.

• Lead, mentor, and develop a team of Junior and Senior Engineers.
• Managing the daily activities of a team of local designers.
• Build technical competence and foster a culture of collaboration, accountability, and continuous improvement.
• Manage team workload, ensuring an effective balance of skills and development opportunities.
• Planning work and projects to meet agreed upon goals and customer expectations.
• Review and approve engineering evaluations, repair plans, calculations, drawings, and technical documentation.
• Able to discern which gas seal applications to accept or not based on technical challenges.
• Support knowledge sharing, coaching, and technical training across engineering teams.
• Manage all first fit gas seal designers in the UK office.
• Promoting a culture of quality and actively pursuing continuous improvement.
• Measuring and reporting team performance, ensuring the highest level of work (flawless design).
• Ensure that customer technical requests are fulfilled by team in a timely manner with high quality output of team.

• Bachelor’s degree in mechanical engineering or equivalent experience
• Technical expert in mechanical seals or similar rotating equipment, minimum 5 years experience.
• Advanced understanding of compressors and rotating equipment.
• Independent creation in the Solid Edge program
• Positive attitude toward teamwork.
• Excellent communication skills with internal and external groups.

With colleagues stretching across the globe, we are proud of our diversity. To foster inclusivity, we run employee resource groups (ERGs) to provide a safe space for employees to connect and support each other. Our cross-business ERGs include Veterans, Pride Network, Black Employee Network, Women@Work Network, and Neurodiversity.

Across our company, we recognize excellence, culminating in the Smiths Excellence Awards, our annual celebration of the most extraordinary activities, people, and projects that best showcase our strengths and help drive our business forward. We announce…