Senior Process EngineerLocation: Sisters, OR or Golden, CO Salary: $120,000–$145,000 base + bonus Relocation assistance availableAbout the RoleWe are seeking a Senior Process Engineer to lead process design, improve facility performance, and support projects from initial engineering through commissioning. This role will focus on developing practical engineering solutions, troubleshooting operational challenges, and establishing best practices to improve system reliability and design quality.The successful candidate will have the opportunity to transition into a Lead Engineer role within approximately one year, taking on greater technical leadership and team oversight responsibilities.Key Responsibilities- Develop, review, and modify process flow diagrams (PFDs), piping and instrumentation diagrams (P&IDs), and other engineering deliverables.- Support EPC projects and facility upgrades from design through commissioning.- Perform material and energy balances, hydraulic calculations, and equipment sizing.- Troubleshoot process issues and validate engineering designs in industrial facilities.- Establish process control requirements and collaborate with automation and programming teams.- Identify opportunities to optimize processes, improve efficiency, and strengthen engineering standards.- Mentor junior engineers and support the development of the wider engineering team.Requirements- Bachelor's degree in Engineering or a related technical discipline.- Strong process engineering experience across industrial projects and facility operations.- Hands-on experience with process design, equipment sizing, field engineering, and commissioning.- Proficiency with ProMax, Aspen Plus, Aspen HYSYS, or comparable process simulation software.- Knowledge of applicable ASME and API codes and standards.- Strong technical problem-solving skills and the ability to work independently.Experience in RNG, natural gas processing, oil and gas, chemical processing, wastewater, petrochemicals, or other heavy industrial environments is highly desirable. Ideally, candidates will have 8–10+ years of experience and previous exposure to mentoring or technical leadership.Additional Details- Four days in the office, with one flexible day.- Approximately 20% travel during commissioning.- Quarterly travel to Sisters required for candidates based in Golden, CO.- Benefits include health, dental, vision, 401(k), and unlimited PTO, generally targeting 4–6 weeks annually.

Location: South West or Midlands | Hybrid – three days per week on siteRate: Competitive hourly rates | Inside IR35 | Umbrella payrollHours: 37 per weekDuration: 12 months, with extensions highly likelyPiper Maddox is supporting a major aerospace engineering business with the appointment of a number of Aerothermal Engineers for a next-generation power and propulsion programme.These positions offer the opportunity to contribute to complex development work, from component-level analysis and concept evaluation through to wider powerplant integration. We’re interested in engineers with expertise across gas-path aerodynamics, turbomachinery, cooling, combustion, and inlet or exhaust flows. Individual responsibilities will depend on your specialism.The roleYou will use analysis and test evidence to understand performance, assess design options and support engineering decisions.Responsibilities will include:Defining aerodynamic, thermodynamic and combustion modelling requirements at system, subsystem and component level.Developing and evaluating concepts to support design trade-offs and concept selection.Performing CFD and other technical analysis, selecting methods and levels of detail appropriate to the development stage and problem.Supporting verification and validation, including test specification, model calibration against measured data and uncertainty assessment.Working with adjacent engineering disciplines to integrate and optimise aerothermal designs, accounting for component interactions and manufacturing constraints.Your backgroundWe’re looking for engineers who combine a strong understanding of fluid mechanics and thermodynamics with practical modelling and analysis experience. You should be comfortable explaining your assumptions, assessing the limitations of a model and translating results into clear recommendations.Relevant experience may include:Aerothermal development within aero engines, gas turbines or closely related applications.CFD, heat transfer, cooling, combustion or turbomachinery analysis.Test-data interpretation and validation of numerical models.Working across design, manufacturing and other engineering disciplines.Awareness of product integrity and relevant certification frameworks.You do not need expertise across every area listed; we are looking to build a team with complementary capabilities.Contract arrangementsThe roles are inside IR35, with payroll through an Umbrella company and weekly timesheets. A BPSS check is required before onboarding, and eligibility for SC clearance is essential.To discuss the opportunities, contact Charles Orr at Piper Maddox or apply with your CV, availability, preferred location and hourly rate expectations.

Piper Maddox have recently partnered with an exciting start-up with one mission – reducing the number of gas-powered vehicles and increasing the adoption of Electric Vehicles (EV) in the United States. Currently, we are looking for an Electrical Engineer to join the team. This person will be responsible for designing, developing and validating all electrical systems. In this position, you will be tasked with a number of things including: • Integrate new electrical systems across multiple departments and support their implementation into production.• Develop and design electrical systems using ECAD software, including the creation and prototyping of electrical harnesses.• Install electrical components and systems on prototype vehicles while maintaining thorough and accurate documentation.• Perform vehicle and bench-level electrical testing, record results, and manage system documentation through PLM platforms.• Coordinate with electrical vendors and contractors while operating equipment safely, maintaining an organized workspace, and adhering to all applicable safety procedures.The ideal candidate will have a background similar to the below:• Bachelor’s degree in Electrical Engineering with 2–6 years of relevant professional experience.• Background in automotive, aerospace, or EV power electronics, with a strong understanding of electrical engineering principles applied to vehicle systems.• Hands-on experience designing and prototyping both 12V and high-voltage power distribution systems.• Familiarity with CAN hardware and software protocols, along with the ability to safely operate basic shop equipment.If this sounds like the kind of position you would like to be considered for, please follow the links and apply!