At Air Products, we reimagine what’s possible. By tapping into the motivation of our people and our collective experience, we create the ideas and innovations that drive us forward. When we come together – where every voice is heard and everyone knows they belong and matter – we create solutions that launch people into space, support lifesaving care in hospitals, and enable the construction of groundbreaking, world scale production facilities. Reimagine What’s Possible  Air Products is seeking a Senior Turbomachinery Aerodynamic Design Engineer to join our Rotoflow® business in Bethlehem, Pennsylvania. In this hands-on engineering design role, you will deliver advanced aerodynamic designs, performance predictions, and engineering tool improvements for turboexpanders, centrifugal compressors, and related turbomachinery systems. This position follows a hybrid work arrangement with four days per week in the office and requires minimal travel, typically less than 10%. Rotoflow®, an Air Products business, combines deep turbomachinery expertise with Air Products’ industrial gas capabilities. We develop new equipment, aftermarket services, and engineered solutions for cryogenic and warm gas centrifugal turbomachinery used in industrial gas, hydrocarbon, LNG, and petrochemical applications. Our portfolio includes compressor-loaded turboexpanders, generator-loaded power recovery expanders, and custom-engineered rotating equipment designed for performance, efficiency, reliability, safety, and value. You will work across the equipment lifecycle, from proposal development and aerodynamic sizing through detailed design, testing, commissioning, troubleshooting, and root cause analysis. This role offers the opportunity to contribute to the development of aerodynamic analysis tools, collaborate with experienced turbomachinery engineers, and apply advanced aerodynamic design methods to challenging customer applications. WHAT WE OFFER: At Air Products we foster a culture of inclusion where every voice is heard, and everyone feels they belong and matter. Additionally, we offer competitive pay and great benefits for our employees. Check out some of our benefits below! * Affordable medical, dental, and vision insurance available day one of employment * 401(k) retirement savings plan with immediate vesting of company match and core contributions * Paid vacation, holidays, and sick time * Paid parental leave * Adoption assistance * Flexible Spending Accounts (medical, dependent daycare) * Health Savings Account * Life Insurance (AD&D), Supplemental AD&D KEY JOB RESPONSIBILITIES: * Perform aerodynamic design activities for awarded customer projects, including flowpath optimization of impellers, vanes, centrifugal compressors, turboexpanders, and related rotating equipment to improve efficiency, performance, and operating range. * Perform preliminary aerodynamic sizing and performance calculations during the proposal phase, then refine analyses through final equipment definition and project execution. * Apply the appropriate level of analytical fidelity, including computational fluid dynamics (CFD), 2D and quasi-3D methods, 1D performance calculations, and aerodynamic performance mapping techniques. * Participate in the development and improvement of aerodynamic engineering tools, sizing methods, performance prediction models, and workflows to increase calculation accuracy, consistency, and productivity. * Collaborate with aerodynamic, simulation, product, proposals, process, and manufacturing engineers, as well as external software providers when appropriate. * Share best practices and technical expertise with other engineers to support consistency in high-efficiency designs and analysis methods. * Support new product development and continuously improve the efficiency, performance, cost, and competitiveness of existing products and project solutions. * Contribute throughout the equipment lifecycle, including equipment testing, data analysis, field commissioning, startup support, aftermarket activities, troubleshooting, and root cause analysis. * Apply fluid dynamics, thermodynamics, compressible flow, and turbomachinery engineering fundamentals to develop practical solutions for complex aerodynamic challenges. * Advocate for aerodynamic considerations while collaborating across disciplines to optimize the overall system solution. * Promote safety, diversity, inclusion, collaboration, and continuous learning consistent with the values of Air Products and Rotoflow. REQUIRED SKILLS / ABILITIES: * Strong knowledge of turbomachinery aerodynamics, compressible flow, flowpath optimization, aerodynamic performance, thermodynamics, fluid dynamics, and turbomachinery performance prediction. * Experience applying CFD and 1D, 2D, and 3D aerodynamic analysis methods in a turbomachinery or rotating equipment environment. * Ability to select and apply the appropriate modeling fidelity for design, analysis, and performance prediction needs. * Strong analytical, creative problem-solving, critical-thinking, decision-making, and root cause analysis skills. * Detail-oriented, organized, self-motivated, collaborative, results-oriented, and customer-focused. * Excellent written, verbal, interpersonal, and presentation communication skills. * Ability to work effectively in a fast-paced, multidisciplinary environment and balance multiple project priorities. * Demonstrated commitment to knowledge sharing, continuous improvement, innovation, and engineering excellence. * Ability to learn quickly, build trust, and maintain a positive, team-oriented approach. MINIMUM HIRING REQUIREMENTS: * BS in Mechanical Engineering or a related engineering discipline required. * 5+ years of turbomachinery or rotating machinery aerodynamic design experience required. * Experience with aerodynamic design of turbomachinery flowpath components, impellers, vanes, compressors, turboexpanders, or related rotating equipment required. * Experience using CFD-based aerodynamic analysis tools and applying 1D, 2D, or 3D aerodynamic methods required. * Experience with turbomachinery testing, data acquisition, performance evaluation, or matching test results to improve analytical models required. * Advanced degree focused on Fluid Dynamics, Thermodynamics, Aerodynamics, Turbomachinery, or a related discipline preferred but not required. * Experience with performance prediction methodologies, aerodynamic performance mapping, equipment selection, and flowpath optimization preferred but not required. * Experience with aerodynamic design and CFD platforms such as ANSYS, Concepts NREC AxCent, or similar turbomachinery analysis tools preferred but not required. * Programming experience using Python, MATLAB, C++, C#, VB, Fortran, or a similar technical programming language preferred but not required. WORKING CONDITIONS * Location: Bethlehem, Pennsylvania. * Hybrid work schedule with four days per week in the office. * Travel requirements: Minimal, typically less than 10% to support business needs, including trade shows and conferences. * Work environment includes office-based engineering activities with periodic support of testing, commissioning, and operational activities. #LI-KC1 #APTPSJOBS Air Products proudly values the skills, dedication, and leadership that veterans bring to the table. As a veteran-friendly organization, we actively encourage and welcome veterans to apply for various roles within our company. We recognize the unique strengths and experiences that veterans contribute, and we foster a workplace that honors your service while providing a platform for professional growth. Founded in 1940, Air Products is a world-leading industrial gases company and has a proud history of innovation, operational excellence, with an unwavering commitment to safety and environmental stewardship. Working together, we are taking our passion and diverse backgrounds forward to reimagine what’s possible and generate a cleaner future for our customers, our communities, and the world.    We are an Equal Opportunity Employer (U.S.).  You will receive consideration for employment without regard to race, color, religion, national origin, age, citizenship, gender, marital status, pregnancy, sexual orientation, gender identity and expression, disability, or veteran status.   Air Products is committed to working with and providing a reasonable accommodation to individuals with disabilities. If you have a disability and you believe you need a reasonable accommodation to search for a job opening or to submit an online application, please e-mail us at talent@airproducts.com. General application status inquiries are not answered by this mailbox rather you’ll receive an e-mail directly from our Career Center and/or the Talent Acquisition Specialist.