Jobs / United States / Castrol
Senior Engineer – Applied Engineering & Testing
Castrol · 🇺🇸 Location unlisted
Sponsorship verdict
No sponsorship evidence yet
No government record and no wording either way. Not a refusal — ask the recruiter.
- No government sponsor record hereThis employer posted directly and does not match a government sponsor register.
- The posting doesn’t mention sponsorshipSilence isn’t a refusal — ask the recruiter before investing much time.
- No salary bar for this routeH-1B has no fixed salary bar: the employer must pay at least the prevailing wage for the role and area. Cap-subject employers enter a lottery weighted by wage level. Source: https://www.federalregister.gov/documents/2025/12/29/2025-23853/weighted-selection-process-for-registrants-and-petitioners-seeking-to-file-cap-subject-h-1b, rules effective 2026-02-27.
- Confirmed live todayWhen a source last listed this job as open.
US H-1B: cap-subject employers enter a lottery weighted by wage level — Level I gets 1 entry, Level IV gets 4 (DHS projected selection odds ≈15% at Level I to ≈61% at Level IV). Universities and non-profit research employers are cap-exempt. The $100,000 fee for new petitions from abroad is currently blocked by a court order (appeal pending).
A verdict summarises public evidence; it is not legal advice and never a guarantee — the employer and the immigration authority decide. Sign in to factor in where you can already work.
Or apply yourself on the official page →
Why not apply?
No register record and no sponsorship wording in the posting. Worth asking the employer before investing significant time.
SponsorApply flags time-wasters so your applications go where they can land. These come from the posting's own wording — read the original listing to confirm. See better-fit alternatives →
Sponsor Radar — Castrol
This employer posted directly and does not match a government sponsor register.
Past sponsorship or register membership never guarantees sponsorship for this vacancy or for you. Full Sponsor Radar for Castrol →
About the role
Castrol is one of the world’s leading lubricant brands, serving customers and consumers in the automotive, marine, industrial and energy sectors. Castrol brands are recognised globally for their premium quality and high performance, shaped by the company’s commitment to innovation and cutting-edge technology. With products sold in more than 150 countries, Castrol has helped keep things moving on roads and racetracks, air, sea, and space for over 125 years. Whether you're just starting out or ready for your next big move, you're in the right place to explore an exciting career with Castrol. Job description About the Team At Castrol, we don’t just make fluids, we help define the future of mobility, energy and digital infrastructure. The Advanced Electrification Testing (AET) team sits within Castrol’s Technology organisation and plays a critical role in supporting Research & Product Development by generating real-world performance data on lubricants, thermal management fluids and cooling technologies. Our mission is to understand how liquids perform inside the systems they are designed to protect and optimise, from electric vehicle batteries and ultra-fast chargers to high-performance data centres and advanced electronics. As part of a major investment programme, Castrol’s Pangbourne Technology Centre is evolving into a centre of excellence for electrification and energy technologies. The team operates world-class testing facilities including battery cell, module and pack laboratories, high-voltage charging systems, immersion cooling tanks, data centre server environments and large-scale thermal management test rigs. This is a team for engineers who are naturally curious. You'll work in an environment that combines the freedom of university-style research with the pace and impact of commercial product development. One day you may be investigating battery cooling performance, the next developing new testing methodologies for data centre technologies or semiconductor cooling systems. You'll join a highly collaborative group of engineers, technicians, graduates and researchers who are passionate about solving complex engineering challenges. We are looking for individuals who love understanding how things work, enjoy getting hands-on with equipment, and want to help create the next generation of high-performance technologies. Key Tasks As a Senior Engineer, you will lead research and development testing projects from concept through to final technical recommendations, working closely with internal stakeholders, technology experts and external partners. Key responsibilities include: - Leading end-to-end testing and engineering projects supporting Castrol's research and product development programmes. - Designing, building, commissioning and operating advanced test rigs and experimental systems. - Developing innovative testing methodologies for emerging technologies across electric vehicles, batteries, charging infrastructure and data centres. - Designing experiments using statistical Design of Experiments (DoE) techniques and ensuring data quality and repeatability. - Performing advanced data analysis and translating results into meaningful engineering insights and recommendations. - Working hands-on with high-voltage systems, instrumentation, thermal management equipment and power electronics. - Supporting the installation, operation and continuous improvement of testing facilities and equipment. - Acting as a subject matter expert in one or more areas such as battery systems, thermal management, data centres, cooling technologies, power electronics or DC power systems. - Collaborating with OEMs, technology partners and internal stakeholders to deliver co-engineered solutions. - Coaching and mentoring engineers, technicians, gra