Sr Principal Mechanical Engineer

Tishman Speyer Properties; Bethlehem (Northampton County); Hybrid; USD 130,000 - 190,000; Full time

Benefits offered by this job

Health insurance

401(k) with company match

Paid vacation and holidays

Parental leave

Flexible Spending Accounts (FSA)

Life Insurance (AD&D)

Job summary

Air Products Rotoflow seeks a Sr Principal Mechanical Engineer to advance turbomachinery design, analysis, and project execution for proprietary high-speed rotating equipment worldwide. The role emphasizes safety, reliability, and collaboration with customers and vendors, with hybrid in Bethlehem, PA or Houston, TX.

The candidate will lead design reviews, support aftermarket tasks, and drive improvements across product offerings, leveraging advanced analytical tools and cross-functional teams.

Qualifications

• BSME or related degree required.
• 10–15 years turbomachinery or rotating machinery design experience.
• Strong knowledge of FEA, rotordynamics, bearing and seal technologies.
• Detail-oriented, collaborative, and customer-focused.

Responsibilities

• Perform turbomachinery design analyses including FEA (stress, deflection, modal), rotordynamics, and hand calculations.
• Develop standardized product deliverables in collaboration with Product Owners.
• Execute mechanical design tasks on awarded projects and product development initiatives.
• Support aftermarket activities and engineering tasks.
• Communicate with vendors on technical solutions.
• Support RCA and field commissioning/startup activities by Aftermarket Team.
• Drive cost reductions and competitiveness across projects.
• Collaborate with customers to ensure proper design and integration of equipment.

Skills

Turbomachinery design

Rotordynamics

FEA

Bearings & seals

Design for manufacturability

3D CAD

Programming: VB, C#, Python

Education

BS Mechanical Engineering (BSME)

Advanced degree in turbomachinery (plus)

Tools

C++

Python

MATLAB

VB

Job description

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 Do you have a passion for solving complex engineering challenges and developing world-class turbomachinery solutions? Air Products is seeking a Sr Principal Mechanical Engineer to join our Rotoflow® team in Bethlehem, PA or Houston, TX. In this role, you will apply your expertise in turbomachinery design, analysis, and project execution to support proprietary high-speed rotating equipment and machinery support systems used by customers around the world. If you thrive in a safety-focused environment and enjoy tackling challenging engineering problems, we invite you to grow with us as we build a more sustainable future.

Rotoflow®, an Air Products business, is a leading turbomachinery OEM providing new equipment, aftermarket services, and engineered solutions to customers worldwide. For more than 75 years, Rotoflow® has specialized in the design and manufacture of standard and custom-engineered cryogenic and warm gas centrifugal turbomachinery serving industries including industrial gases, petrochemicals, and hydrocarbons. Our products include compressor-loaded turbo-expanders, generator-loaded power recovery expanders, and low-cost dissipative expanders. In addition to new equipment, we provide upgrades, repairs, field services, engineering evaluations, reliability and troubleshooting support, training, remote diagnostics and monitoring, shop services, and replacement equipment for a wide variety of centrifugal and reciprocating machinery. Customers are supported globally through regional service centers backed by both regional and centralized execution teams. To learn more, visit www.Rotoflow.com.

Key Job Responsibilities:

• Perform various turbomachinery design analyses including FEA (stress, deflection, and modal), hand calculations, and rotordynamics
• Development of standardized product deliverables collaborating with Product Owners
• Executing mechanical design tasks related to awarded projects and product development initiatives
• support of aftermarket activities and engineering tasks
• Communicate with vendors on technical solutions
• Support root cause analyses (RCA) of equipment and field commissioning and startup activities executed by the Aftermarket Team
• Drive engineering and material cost reductions and competitiveness across project and product offerings collaborating with stakeholders
• Collaboration with customers to ensure proper design and integration of equipment into the process
• Select components and materials for turbomachinery and systems
• Perform safety and operability reviews
• Collaborate with various subject areas to finalize equipment designs
• Checking and approving manufacturing drawings
• Support of bid estimate development
• Collaborate with the Business Improvement Team to develop new and standardized design engineering tools and work processes for streamlining projects and product development
• Challenge norms with alternate solutions rooted in engineering fundamentals
• Promote safety and diversity consistent with the philosophies of Rotoflow®

What's In It for You:

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 Employee Assistance Program (EAP)

Required Skills / Abilities

10–15 years turbomachinery or rotating machinery design experience, Deep understanding of design principles including FEA, rotordynamics, bearing and seal technologies, and design for manufacturability, Detail-oriented, goal oriented, organized, creative, self-motivated, collaborative and customer focused, Excellent analytical, creativity, problem solving, time management, and decision-making skills, Excellent interpersonal skills (written, verbal and presentation), Exemplify a passion for winning and ability to motivate teams, Ability to create an environment of trust and consistently exhibit a positive attitude

Differentiating Skills / Abilities

Advanced FEA capabilities a plus, Rotordynamic analysis capabilities a plus, Fluid film bearing, gas bearing, magnetic bearing, hydrostatic bearing and rolling element bearing applications and design experience a plus, Gas seal and labyrinth seal applications and design experience a plus, Design for manufacturability experience a plus, Turbine testing, data acquisition and data evaluation a plus, 2D CAD and 3D modeling and simulation a plus, Equipment startup and plant integration a plus, Programming skills: VB, C#, C+, Python, Matlab, Fortran or similar languages a plus, Degree and Licensing Requirements Technical Degree: BS Mechanical Engineering (BSME) or related degree. Advanced degree and focus on turbomachinery design, rotordynamics, fluid film bearings, seals, design for manufacturability, and/or manufacturing processes a plus.

Degree and Licensing Requirements

Technical Degree: BS Mechanical Engineering (BSME) or related degree. Advanced degree and focus on turbomachinery design, rotordynamics, fluid film bearings, seals, design for manufacturability, and/or manufacturing processes a plus.

Working Conditions

This position is based at our headquarters in Bethlehem, PA, or Houston, TX. Hybrid work schedule with 4 days in-office. Subject to change. Travel requirements: Minimal-under 10% for onsite customer support. Work environment: Indoors office setting at same site as testing lab and manufacturing floor.

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 [e-mail].

Employee and Applicant Rights Behind every success and innovation that has made a difference in the world, you will find a team of passionate people who helped make it possible. At Air Products, our talented people help each other and our customers thrive. To our colleagues, we are valued and respected teammates. To our customers, we are partners in creating value. To our communities, we are caring, involved neighbors and committed stewards of the environment.

Air Products is a world-leading industrial gases company with more than 85 years of experience serving energy, environmental, and emerging markets while generating a cleaner future. Our people are at the heart of everything we do. We are committed to creating a workplace where safety comes first, diverse perspectives are valued, innovation thrives, and employees have opportunities to learn, grow, and make a meaningful impact.