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Defense Modeling Simulation Jobs in Illinois (NOW HIRING)

Ignite Human Capital

Design Engineer III

Naperville, IL · On-site

... aerospace, defense, industrial, and medical products. This role requires deep expertise in RF ... RF circuit simulation and modeling * Signal integrity and power integrity analysis * PCB layout ...

NEOTech

Design Engineer III (24903)

Naperville, IL · On-site

$100K - $115K/yr

... aerospace, defense, industrial, and medical products. This role requires deep expertise in RF ... RF circuit simulation and modeling * Signal integrity and power integrity analysis * PCB layout ...

Isys Technologies

IL · On-site

$85K - $92K/yr

Our programs support multiple Federal agencies, the Department of Defense and often focused on the ... model-based simulations, recommends optimal configurations to achieve prioritized DoD mission ...

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All JobsDefense Modeling Simulation JobsDefense Modeling Simulation Jobs in Illinois

Defense Modeling Simulation information

What is the difference between Defense Modeling Simulation vs Defense Systems Engineer?

AspectDefense Modeling SimulationDefense Systems Engineer
Required CredentialsBachelor's or higher in engineering, computer science, or related fields; often certifications in modeling and simulationBachelor's or higher in engineering, systems engineering, or related fields; certifications in systems engineering may be preferred
Work EnvironmentResearch labs, defense contractors, government agencies; focus on simulation development and analysisDesign, develop, and integrate defense systems; work in engineering teams within defense companies or military organizations
Employer & Industry UsagePrimarily in defense research, simulation development, and testingInvolved in system design, integration, and lifecycle management of defense platforms

Defense Modeling Simulation specialists focus on creating and analyzing simulations to test defense concepts, while Defense Systems Engineers design and develop actual defense systems. Both roles require engineering backgrounds but differ in their core responsibilities and work environments.

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Defense Modeling Simulation jobs near you
Infographic showing various Defense Modeling Simulation job openings in Illinois as of August 2026, with employment types broken down into 91% Full Time, and 9% Temporary. Highlights an 100% In-person job distribution.

Design Engineer III

Ignite Human Capital

Naperville, IL • On-site

Full-time

Re-posted 12 days ago

Job description

We are seeking an experienced RF Designer to lead the design, development, and validation of high-frequency circuits and systems for demanding applications including aerospace, defense, industrial, and medical products. This role requires deep expertise in RF/microwave design, PCB materials, and system integration, along with the ability to work in a customer-facing environment.
Key Responsibilities
  • Design and develop RF and microwave circuits including amplifiers, filters, mixers, oscillators, and antennas
  • Perform schematic capture, simulation, and layout of high-frequency PCBs
  • Select and apply advanced RF materials (e.g., Rogers laminates such as RO4350B, RO4003C, RT/duroid series)
  • Conduct RF simulation using tools such as:
    • Keysight ADS
    • Ansys HFSS
    • Cadence AWR Microwave Office
  • Optimize impedance matching, signal integrity, and EMI/EMC performance
  • Develop RF test plans and perform lab validation using VNAs, spectrum analyzers, and signal generators
  • Collaborate with PCB layout, mechanical, and manufacturing teams to ensure design for manufacturability (DFM/DFA)
  • Interface directly with customers to define requirements, present designs, and support technical reviews

Support prototype builds, troubleshooting, and production ramp-up
Qualifications
Required Qualifications
  • Bachelor's or Master's degree in Electrical Engineering or related field
  • 8+ years of experience in RF/microwave design
  • Strong understanding of transmission lines, impedance matching, S-parameters, and EM theory
  • Hands-on experience with RF test equipment (VNA, spectrum analyzer, power meters)
  • Experience designing multilayer RF PCBs and working with controlled impedance structures
  • Familiarity with high-frequency PCB materials and stack-up design

Preferred Qualifications
  • Experience with mmWave or high-frequency (>10 GHz) designs
  • Knowledge of hermetic and high-reliability packaging techniques
  • Experience with LTCC, hybrid circuits, or module-level RF design
  • Familiarity with military and aerospace standards (MIL-STD, IPC Class 3)
  • Experience designing for harsh environments (temperature, vibration, radiation)

Key Skills
  • RF circuit simulation and modeling
  • Signal integrity and power integrity analysis
  • PCB layout guidance for RF performance
  • Debugging and root cause analysis
  • Strong communication and customer interaction skills

Due to ITAR and / or CUI compliance, this position requires candidates to be a U.S. Citizen.

Apply