Principal Systems Engineer

Honeywell Aerospace is seeking an experienced Principal Systems Engineer specializing in Environmental Control System (ECS) modeling and analysis. This role focuses on developing and validating ECS system‑level models with an emphasis on steady state performance, thermodynamics, and aircraft environmental/thermal management. The ideal candidate will bring deep technical expertise and the ability to drive system‑level analysis that supports design, integration, and customer requirements.

Key Responsibilities

• Lead the creation, enhancement, and maintenance of ECS system‑level models for steady‑state performance prediction, trade studies, and design optimization.

• Conduct system architecture studies, evaluating alternative ECS configurations, subsystem interactions, load paths, and integration strategies.

• Perform thermodynamic and fluid‑flow analysis of air cycle systems, air‑conditioning packs, bleed air systems, PTMS, NGS, and related ECS subsystems.

• Demonstrate strong expertise in VCS modeling and analysis through steady‑state model development, architecture trade studies, component‑to‑system integration assessments, and data‑driven design insights.

• Serve as the proposal technical lead, defining system performance baselines, assessing technical risks, and identifying value‑engineering opportunities for new business pursuits.

• Conduct steady‑state simulations across environmental, load, and failure scenarios, and define system operating points, boundary conditions, and performance criteria aligned with aircraft requirements.

• Generate clear engineering recommendations that support decisions for system architecture, component sizing, control strategies, and integration.

• Support component and subsystem teams with analytical inputs, performance sensitivities, and system‑level impact assessments.

• Interface with internal and external customers to present results, participate in technical reviews, and justify analytical methods.

• Validate steady‑state models through correlation with test data and support verification and validation strategy development.

• Mentor junior engineers and contribute to advancing ECS modeling tools, methods, and best practices.

• Ensure compliance with Honeywell engineering processes, aerospace standards, and program deliverables.

Qualifications

• Bachelor’s degree in Mechanical Engineering, Aerospace Engineering, or a related technical field (Master’s or PhD preferred).

• 10–15+ years of experience in aerospace systems engineering, thermal systems, or ECS‑related analysis.

• Strong foundation in thermodynamics, heat transfer, and fluid mechanics.

• Proficiency with system‑level modeling tools such as VBA, Fortran, MATLAB/Simulink, or equivalent.

• Demonstrated experience in steady‑state system analysis, performance prediction, and trade studies.

• Experience with aircraft ECS, thermal management systems, air cycle systems, or vapor cycle systems.

• Familiarity with aircraft‑level requirements, safety analyses, and system integration.

• Proven ability to lead cross‑functional technical efforts and drive analytical strategy.

• Strong communication skills for conveying complex technical information to diverse audiences.

Pay Equity Language:

Due to compliance with U.S. export control laws and regulations, candidate must be a U.S. person, which is defined as, a U.S. citizen, a U.S. permanent resident, or have protected status in the U.S. under asylum or refugee status.

Export Compliance Language:

The annual base salary range for this position is $154,000 - $192,000. Please note that this salary information serves as a general guideline. Honeywell considers various factors when extending an offer, including but not limited to the scope and responsibities of the position, the candidate's work experience, education and training, key skills, as well as market and business considerations.

Benefits Language :

In addition to a competitive salary, leading-edge work, and developing solutions side-by-side with dedicated experts in their fields, Honeywell Aerospace employees are eligible for a comprehensive benefits package. This package includes employer subsidized Medical, Dental, Vision, and Life Insurance; Short-Term and Long-Term Disability; 401(k) match, Flexible Spending Accounts, Health Savings Accounts, EAP, and Educational Assistance; Parental Leave, Paid Time Off (for vacation, personal business, sick time, and parental leave), and 12 Paid Holidays. For more information visit: Homepage | Honeywell Aerospace Benefits (

Posting Timeline Language :

The application period for the job is estimated to be 40 days from the job posting date; however, this may be shortened or extended depending on business needs and the availability of qualified candidates.