Sr Principal Mechanical Engineer

Society of Fire Protection Engineers; Bethlehem (Northampton County); Hybrid; USD 140,000 - 190,000; Full time

Benefits offered by this job

Affordable medical, dental, vision

401(k) with company match

Paid time off & holidays

Parental leave

Flexible Spending Accounts

Life Insurance

Employee Assistance Program

Job summary

Air Products seeks a Sr Principal Mechanical Engineer for its Rotoflow turbomachinery team in Bethlehem, PA or Houston, TX. You will lead design analyses, mentor engineers, and collaborate across functions to deliver high‑reliability rotating equipment and aftermarket support. Hybrid in‑office schedule with minimal travel.

Ideal candidate has 10–15 years in turbomachinery, deep FEA/rotordynamics expertise, and strong collaboration skills to drive innovation and safety in global projects.

Qualifications

• 10–15 years turbomachinery or rotating machinery design experience.
• Deep understanding of FEA, rotordynamics, bearings and seals.
• Design for manufacturability and cross‑functional collaboration.
• Detail‑oriented, analytical, and customer focused.
• Strong written/verbal communication and teamwork.

Responsibilities

• Perform turbomachinery design analyses, FEA, rotordynamics, and hand calculations.
• Develop standardized deliverables with Product Owners.
• Execute mechanical design tasks on awarded projects and product dev.
• Interface with vendors to resolve technical solutions.
• Support RCA and field commissioning activities.
• Drive cost reductions and improve competitiveness.
• Collaborate with customers for proper equipment integration.
• Select components and materials for turbomachinery.

Skills

Turbomachinery design

FEA & rotordynamics

Bearing & seal tech

Design for manufacturability

Analytical problem solving

Communication & collaboration

Leadership & mentoring

Programming basics (VB/C#/Python)

Education

BS Mechanical Engineering

Advanced degree in turbomachinery (plus)

Tools

CAD (2D/3D)

Simulation tools

Matlab

Python

Fortran

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:

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
• 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.

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.