Defense Tech Raised $14.6B in 5 Months. Your TS/SCI Search Finds 0.1%.
Defense tech is hiring 50% harder than software startups, but LinkedIn's TS/SCI keyword search surfaces 0.1% of cleared engineers. Here's the fix.
Defense-tech venture funding just hit $14.6B in five months, more than all of 2025 combined, and Anduril's rumored $61B mark is turning every early hire into a liquid millionaire. If you are still typing "TS/SCI" into LinkedIn Recruiter, you are competing for a pool that represents roughly one tenth of one percent of the actual cleared population. This is a sourcing problem, not a supply problem.
The $14.6B wave is real, and it is concentrated
Defense-tech capital in 2026 is not a rumor, it is a repricing event. Crunchbase counts more than $14.6 billion into military, national security, and law enforcement categories in the first five months of 2026 alone, past the $9.6B annual record set in all of 2025.
The pace of deals is only slightly ahead of last year (107 rounds so far versus 206 in all of 2025), which means capital is concentrating into fewer, larger checks. The rounds that matter for your pipeline:
- Anduril Industries closed a $5B Series H on May 13 led by Thrive Capital and Andreessen Horowitz, valuing the company at $61B inclusive of secondary and tender.
- Shield AI raised $2B at $12.7B (Series G, Advent International and JPMorgan, plus $500M preferred from Blackstone).
- Saronic Technologies raised $1.75B Series D led by Kleiner Perkins at $9.25B, more than doubling its prior mark.
The second-order effect matters more than the headline. Secondary tenders at Anduril's $61B mark turn every engineer hired before 2023 into a millionaire, and that resets comp expectations across the entire prime-alumni network. Lockheed, Northrop, and RTX are now competing against liquidity events, not salary bands.
Why "TS/SCI" on LinkedIn returns almost nothing
The direct answer: cleared engineers are trained, and often contractually required, to keep clearance details off public profiles, so keyword search selects for the worst candidates and hides the best ones.
In Refolk's index of professional profiles, a broad U.S. free-text query for "TS/SCI cleared" across all roles returns just 1,313 profiles. ODNI's most recent annual report puts the actual U.S. Top Secret population at roughly 1.25 to 1.3 million people. That is a 0.1% surface rate.
Worse, when you narrow to engineering titles and add clearance-adjacent keywords like "clearance," "polygraph," or "SCIF" to the headline filter, the U.S. count in Refolk's index drops to zero. Not a small number. Zero. The engineers building autonomy stacks at Anduril, drone software at Shield AI, and maritime autonomy at Saronic do not put "Full-Scope Poly" in their LinkedIn headline. It is a security-education failure to do so, and most of them know it.
Who does put "TS/SCI" in their headline
Understanding the selection bias is half the fix. The engineers who advertise clearance publicly are disproportionately:
- Contractors moving between beltway body shops on short bench cycles.
- Recent transitioners from active duty who have not yet been briefed on OPSEC norms at their current employer.
- Recruiters and staffing intermediaries who use the keyword to attract inbound.
None of those are the passive senior IC talent Anduril, Shield AI, or Saronic are actually paying $300K plus equity to poach.
The signal that actually works: employer plus geography plus title
The direct answer: search for engineering titles at defense employers in the six metros where cleared work actually happens, and skip clearance keywords entirely.
In Refolk's index, a U.S. search for Software, Senior, Staff, and generic Engineer titles at Defense and Space Manufacturing employers returns 26,945 profiles. That is 20x the "TS/SCI" keyword pool, and the vast majority hold active clearances by virtue of their employer. Top current employers in that pool:
- Lockheed Martin
- Northrop Grumman
- Anduril Industries
- K2 Space
- Sonalysts
- Hadrian
- Kessel Run
- Stoke Space
Kessel Run is the interesting one. It is the Air Force's Boston-based software factory, and its engineers blend commercial DevOps fluency with active DoD clearances. If you are trying to land a Forward Deployed Engineer who can talk to both a Palantir PM and a two-star, that is your list.
The six hubs
Engineer talent at defense employers concentrates in a small number of metros. For general defense work: Boston, LA Metro, Costa Mesa, San Diego, Tucson, and Sunnyvale. For TS/SCI specifically, add DC-Baltimore, Tampa Bay, and Northern Virginia (Reston, Fairfax). Recruiters targeting cleared talent outside those clusters are fighting geography.
The reason this works: clearance status is inferable from employer plus start date plus role. A senior embedded engineer at Raytheon in Tewksbury for the last four years is cleared. You do not need them to say it. This is the exact gap Refolk closes for defense recruiters: describe the profile in plain English, get a ranked list of people whose employer history implies the clearance, then verify in the intro call.
The numbers, in one place
Here is the full picture, with sources, so you can share it with your hiring manager the next time they ask why the TS/SCI pipeline is empty.
| Sourcing signal | Count | Source |
|---|---|---|
| Total U.S. cleared population (FY2023 eligibility) | 4,316,728 | ODNI Annual Report |
| Top Secret clearances (industry-wide) | ~1.25M to 1.3M | liedetectortest.com |
| U.S. profiles found via "TS/SCI cleared" keyword | 1,313 | Refolk's index |
| U.S. engineers at Defense & Space Manufacturing employers | 26,945 | Refolk's index |
| Engineer profiles with "clearance/polygraph/SCIF" in headline | 0 | Refolk's index |
| Defense-tech vs. software open roles per company | 5.2 vs 3.5 | Paraform |
The last row is the demand side. Paraform's data shows defense and space manufacturing startups post an average of 5.2 unique open roles per company against 3.5 for software startups. Fifty percent more hiring intensity per org, chasing a candidate pool that keyword search cannot see.
The 102-day fill time is a repricing symptom
The direct answer: the embedded firmware roles that take 102 days to fill are not stuck because talent is scarce, they are stuck because Anduril's secondary market broke the prime comp band.
Paraform reports 80% of embedded firmware postings stay open for months, with a 102-day average time to fill. The default explanation is clearance bottlenecks: reinvestigation, SF-86 processing, the 6-12 month wait for a new SCI read-in. That is real, but it is not why senior firmware engineers are ghosting your recruiter.
The mechanism is comp. DoD data shows Top Secret holders average $126,839 in total comp, and TS/SCI holders average $139,261. That was a defensible number in 2023. It is not defensible when a Series C defense startup is offering $220K base plus equity that just marked at a $9B valuation. Every 102-day req is a comp band that has not caught up to the market.
Every 102-day requisition is a comp band that has not caught up to Anduril's cap table.
Startups that can meet the new market clear reqs in weeks. Primes that anchor to legacy bands clear them in quarters.
The alumni sourcing trap
The direct answer: prime alumni are your best pool, but only for the first 24 months after they leave, because continuous vetting under Trusted Workforce 2.0 lapses clearances into "current" instead of "in-access" quickly.
If you source a Lockheed engineer who left three years ago, they will need reinvestigation before they can touch classified code. That adds 6 to 12 months to onboarding, the same bottleneck Paraform flagged. So the targeting rule is narrow:
- Sweet spot: 3 to 24 months since departure from a cleared role.
- Workable: 24 to 36 months, with a reinvestigation timeline baked into the offer.
- Trap: 36+ months since last in-access date, unless the role does not require immediate SCI read-in.
The ODNI headline number that 31% of cleared individuals are contractors understates the addressable pool at TS/SCI. Intelligence-community billets lean heavily on contractor support at TS/SCI and above, so the contractor share at that tier is closer to half. Translation: at TS/SCI specifically, you can hire without waiting on federal-employee-to-contractor transitions. The candidates are already contractors.
Where the next-tier bets are hiring
The direct answer: after Anduril, Shield AI, and Saronic, the watchlist for cleared-engineer demand in 2026 is Mach Industries, Applied Intuition (defense arm), Hadrian, Vannevar Labs, Epirus, and Castelion.
Each of these has raised in the last 18 months and each has a hardware-adjacent engineering profile that requires cleared talent for at least part of the roadmap. Hadrian is machining. Epirus is directed energy. Castelion is hypersonics. Vannevar is intelligence software. If you are running a defense-focused desk, these are the eight logos your sourcing plan should cover in addition to the primes.
The practical workflow: pull the 26,945 defense-employer engineer pool, filter by the six hubs, filter by 3 to 24 months tenure at current employer, and rank by adjacency to the hardware stack you need. That is where Refolk earns its keep, because "senior embedded engineer at a defense prime in San Diego who worked on radar signal processing" is a plain-English query, not a boolean.
For recruiters coming from commercial tech, the mental shift is this: in defense, employer is the clearance filter, geography is the read-in filter, and tenure is the comp filter. Get those three right and you do not need the word "clearance" anywhere in your search string.
FAQ
Does searching "Secret" instead of "TS/SCI" work better on LinkedIn?
Marginally, but not enough to change the math. Secret clearance holders are a larger pool (roughly 3 million eligible per ODNI), and the OPSEC pressure to omit clearance from public profiles is weaker at that tier. You will get more hits, but you are still selecting for candidates willing to advertise clearance publicly, which correlates negatively with seniority at top defense-tech employers. Employer-plus-geography sourcing still wins.
How do I verify clearance status without asking directly?
You do not verify it in sourcing, you infer it and confirm in the first call. Continuous employment at a cleared employer for 12+ months in a role that requires access is a strong signal. In the intro conversation, ask about the last program they worked on and whether their access is current. Cleared engineers know the exact vocabulary ("in-access," "read-in," "crossover"). Candidates who fumble the terms usually do not hold what they claim.
What is the fastest way to build a defense-tech sourcing list from scratch?
Start with the eight employers in Refolk's top list (Lockheed, Northrop, Anduril, K2 Space, Sonalysts, Hadrian, Kessel Run, Stoke Space), add the next-tier watchlist (Shield AI, Saronic, Mach, Applied Intuition, Vannevar, Epirus, Castelion), and pull engineer profiles across the six hubs. That gets you a working list of tens of thousands of candidates in an afternoon, most of whom hold active clearances by virtue of their employer.
Are Anduril and Palantir alumni actually poachable, or too rich to move?
Both, depending on vintage. Engineers who joined Anduril before 2022 are sitting on secondary-market liquidity that makes them expensive but not immovable, they move for scope, not comp. Post-2023 hires are still building their position and respond to standard senior-IC offers. Palantir alumni are the most active channel right now because the FDE-to-startup pipeline is well established and the equity clocks have run out for many of them.