The Aerospace Industries Association and McKinsey released their 2025 workforce study in March — the most comprehensive analysis of A&D sector talent dynamics since the pre-COVID era. Based on data from over 30 organizations representing 600,000+ U.S. employees, the headline finding is stark: industry-wide attrition held at nearly 15% in 2024, more than double the U.S. industry average of approximately 6.5%.
The A&D workforce grew to 2.23 million employees in 2024, up 2.9% year-over-year. But that headline growth number masks the churn underneath: the sector is replacing departing workers faster than it is genuinely growing — and the workers leaving are disproportionately the most experienced.
The demographic time bomb
The AIA/PwC July 2024 workforce report adds the structural dimension that makes the attrition numbers especially concerning: only 7% of A&D employees are under 25, while 25% are 56 or older. The sector's institutional knowledge is concentrated in a cohort that will retire over the next 10–15 years — and the pipeline to replace them is thin.
This demographic imbalance is not primarily a function of pipeline failure. The STEM talent entering the workforce is there. The problem is that early-career A&D professionals are leaving the sector faster than they are being retained. The same compensation dynamics that are driving mid-career attrition are even more acute for new entrants comparing their first-job options.
The three drivers of attrition
The McKinsey analysis identifies three primary drivers. Compensation gaps relative to the broader tech sector are the most frequently cited. A software engineer at an A&D prime contractor and an equivalent engineer at a commercial software company doing similar technical work face a compensation differential that has widened as the tech sector has scaled rapidly. The clearance premium that A&D companies have traditionally used to offset this gap is losing ground to remote-work flexibility, equity compensation, and the career trajectory advantages that commercial tech companies offer.
Career development constraints are the second driver. Large prime contractor organizations with established hierarchies, long tenure-to-promotion timelines, and program-specific skill development often frustrate engineers who want to build breadth across domains. The ITAR-constrained nature of much A&D work limits cross-sector mobility in ways that do not apply in commercial engineering.
Mission alignment is the third and most underappreciated driver. The AIA/McKinsey study found that engineers under 35 increasingly cite a desire to work on programs with visible positive environmental or social impact. While defense and aerospace work is genuinely important, the narrative around that importance is less visible than the narrative around clean energy, health technology, or climate programs. This is a communications problem as much as a structural one.
"The best engineers we lost in 2024 had one thing in common: they all went somewhere where they could see the direct human impact of what they were building." — Program Director, defense prime contractor, 2025.
What this means for independent STEM professionals
The attrition crisis creates a specific opportunity for independent specialists. The experienced engineers and scientists leaving large prime contractor organizations are entering the independent market in significant numbers — and the programs that need their ITAR-specific expertise have no replacement pipeline from traditional employment channels.
Mission-based platforms that can verify A&D credentials, manage ITAR compliance in the hiring flow, and structure milestone-based contracts are better positioned to serve this market than traditional staffing agencies, which lack the compliance infrastructure, or general freelance platforms, which lack the domain credibility.
The practical implication: if you are an experienced A&D professional considering an independent path, the demand for your specific combination of ITAR-cleared expertise, program management experience, and systems knowledge has rarely been higher. The structural talent gap means the market will pay a premium for verified specialists who can be onboarded quickly into active programs.
The sector in 2026 and beyond
AIA's 2025 Facts & Figures report documents the underlying demand that makes the talent crisis especially acute: U.S. A&D generated $995 billion in total business activity in 2024, a $73.86 billion trade surplus, and $443 billion in economic value. The programs driving this activity are not slowing — they are accelerating, driven by the AUKUS partnership, the Space Force expansion, and the commercial space boom.
The talent infrastructure has not kept pace with program expansion. That gap — between the scale of programs and the availability of verified specialists to staff them — is precisely the problem that mission-based platforms are built to solve.