Thermal Systems Engineer – Advanced Prototypes (Hybrid)

Connexion Systems and Engineering, Inc.; Lexington (MA); Hybrid; USD 124,000 - 197,000; Full time

Job summary

Connexion Systems & Engineering seeks a Thermal Engineer to support advanced prototype systems for national security missions across space, air, ground, and underwater platforms.

The role focuses on thermal analysis, modeling, hardware development, integration, and testing across the full engineering lifecycle, with an emphasis on mission-critical thermal management and multidisciplinary collaboration.

Qualifications

• Bachelor’s degree in Thermal, Mechanical, or Aerospace engineering or related field.
• 5+ years of professional thermal engineering experience.
• 5+ years of thermal analysis experience.
• 5+ years of Thermal Desktop — required.
• 5+ years of SolidWorks experience — required.

Responsibilities

• Develop and execute geometry-based thermal models for prototype systems and components.
• Apply thermo-physical and optical material properties; model interfaces.
• Perform steady-state and transient thermal analyses to evaluate temperatures and requirements.
• Provide thermal engineering input for system-level trade studies and design reviews.
• Design and analyze thermal for space-qualified optical/electronics/structures hardware.
• Evaluate and procure thermal control hardware.
• Develop and execute testing plans for developmental and qualification stages.
• Support hardware development, integration, and environmental testing.
• Collaborate across disciplines (structural, mechanical, electrical, optical, systems).
• Travel domestically for meetings and field sites (≈10%).

Skills

Thermal analysis

Engineering design

Thermal modeling

Education

Bachelor’s degree in Thermal/Mechanical/Aerospace engineering

Tools

Thermal Desktop

SolidWorks

ANSYS/COMSOL

Job description

Connexion Systems & Engineering seeks a Thermal Engineer to support advanced prototype systems for national security missions across space, air, ground, and underwater platforms.

The role focuses on thermal analysis, modeling, hardware development, integration, and testing across the full engineering lifecycle, with an emphasis on mission-critical thermal management and multidisciplinary collaboration.