Aircraft systems engineering is everything on the airplane that is not the airframe or the engines: avionics, flight control systems, electrical power, environmental control, landing gear, navigation, radar, and communications. It is the discipline where the safety case lives. The FAA accepts RTCA DO-178C and EUROCAE ED-12C as the means of compliance for airborne software, and DO-254 with ED-80 for airborne electronic hardware, with objectives scaled by the software or hardware level assigned from the failure condition classification .
Hiring challenges in aircraft systems
Environmental control systems that switched from bleed air to electrons
Environmental control systems consume more non-propulsive energy than anything else on the aircraft. The traditional architecture taps bleed air off the engine compressor, conditions it through air cycle machine packs, and discards what it does not use. The 787 moved to bleedless electric compressors, and the numbers behind that shift are stark: modeling of an A320-class system shows a conventional ECS consuming 3.59 MJ against 1.78 MJ for an electric version, with bleed off-take carrying a fuel penalty roughly 50 percent higher on long missions . TU Delft's optimization work pushes further, with an electrically driven vapour compression cycle cutting fuel weight penalty by 18 percent against the bleedless air cycle machine . ECS engineers therefore split by generation: bleed-system people own precoolers, packs, and water separation; electric-ECS people own compressors, power electronics, and refrigerant circuits . The two lineages barely share a design flow.
Aircraft power systems where variable frequency wins
Variable frequency generation changed aircraft power systems. Generators now run straight off the engine accessory gearbox, and Collins Aerospace supplies constant-frequency, variable-frequency, and high-voltage DC products, with its generators logging nearly 500,000 flight hours every day . The hiring split follows the bus architecture: 115 VAC 400 Hz heritage loads, 230 VAC variable frequency distribution, 28 VDC equipment buses, and high-voltage DC on more-electric platforms each demand a different instinct about load shedding, bus protection, and rectification . A power systems engineer who has only worked 400 Hz constant frequency has never designed the power electronics that more-electric architectures depend on, and the CV will not volunteer that fact.
Flight control systems that consolidated onto one supplier bench
Flight control and actuation consolidated sharply in 2025, when Safran closed its acquisition of Collins Aerospace's flight control and actuation activities: a business of about 4,000 people across eight facilities, integrated on 180 platforms, with revenue around $1.55 billion in 2024 . The deal pairs hydraulic and mechanical actuation heritage with electromechanical actuation aimed at the next generation of single-aisle aircraft. For hiring, the consolidation carries three consequences. The bench is smaller than the fleet suggests. Most flight control systems experience sits inside a handful of houses rather than the airframers. And the electrified architectures coming next require electromechanical actuation skills that have never existed at scale anywhere .
Avionics where the DAL level decides the objective count
Avionics hiring runs on levels. DO-178C assigns software levels A through E from the failure condition classification, and the number of objectives a program must satisfy scales with the level; DO-254 does the same for electronic hardware, with AC 20-152A layering custom-device, previously developed hardware, and COTS guidance on top . A candidate who has closed Level D software and one who has closed Level A objectives have done different jobs, at different cost, under different review pressure. The CV rarely states the level, so screening has to pull it out: which annex tables did the candidate's plan include, and which stage-of-involvement reviews did they sit through .
Aircraft control systems that the safety assessment sizes
Above the box level, aircraft control systems are sized by the system safety assessment. The FAA recognizes SAE ARP 4754A as an accepted method for development assurance, and it requires functional and item development assurance levels to be assigned, proposed, and concurred with the agency early in the program . That upstream work determines how much rigor every downstream engineer must carry for the rest of the program. Engineers who have owned an FDAL or IDAL assignment and the safety analyses behind it are a different grade from those who received requirements from someone else's assessment, and interviews rarely reveal which one did the sizing .
Landing gear that three suppliers divide the world
Landing gear belongs to a supplier oligopoly. Safran claims the number one position in landing gear, carbon brakes, and braking systems, equipping more than 35,000 aircraft across 80-plus civil and military programs, with Collins and Liebherr splitting much of the rest of the world . The engineering spans ATA Chapter 32: structures that absorb touchdown impact, extension and retraction actuation, steering, and brakes that convert the whole landing energy into heat . Carbon brake and electric braking work concentrate the newer skills, and the engineers who own them sit inside the suppliers rather than the airframers, which is where most searches start looking.
Aircraft navigation that moved into the avionics bay
Aircraft navigation left its analog ancestors behind. Inertial systems, GNSS receivers, radio navigation, and the flight management function that fuses them now share an avionics bay, and aircraft communication systems, from VHF datalink through satcom terminals, ride the same integration benches and the same certification plans . The hiring consequence is that a navigation engineer is an integration engineer: someone who owns performance budgets across sensors, watches for integrity and availability failures, and knows what the aircraft does when one source disagrees with another. The population is larger than it was, but the fraction of it that has carried a certified navigation function through a level A review is not, and the systems houses that own that experience are few enough to count on one hand.
Radar claims an antenna range and a finding can audit
Radar is where aircraft systems assessment shows its mechanics most clearly. The work is built on antenna ranges, signal processing benches, and mode-by-mode flight test evidence, and the questions write themselves: which radar modes did the candidate own, what did the range campaign actually measure, and which certification finding did they close with data. The same logic applies across aircraft systems. Ask which rig the candidate's hardware lived on, which bus architecture their software ran against, and which findings carry their name . A systems engineer who can answer all three without reaching for the datasheet is the profile the program actually needs, and they are exactly as rare as that sounds. The hiring implication is worth stating once: in this discipline, the engineer who can defend a rig campaign and a closed finding is worth more than one who can list every standard in the certification basis.
References
- Software and AEH Updates — Federal Aviation Administration (FAA). (accessed 2026-09-28)
- Integrated Design Optimization of Environmental Control Systems for Next-Generation Aircraft — TU Delft Research Portal. (accessed 2026-09-28)
- Energy-Efficient Three-Wheel Bleedless Electrical Environmental Control System for a Passenger Aircraft — ASME Journal of Thermal Science and Engineering Applications. (accessed 2026-09-28)
- Electric Power Generation — Collins Aerospace. (accessed 2026-09-28)
- Safran Announces the Acquisition of Flight Control and Actuation Activities from Collins Aerospace — Safran. (accessed 2026-09-28)
- AC 20-174: Development of Civil Aircraft and Systems — Federal Aviation Administration (FAA). (accessed 2026-09-28)
- Safran Landing Systems: World Leader in Aircraft Landing and Braking Systems — Safran. (accessed 2026-09-28)