01 / Executive brief
Executive summary
Yu Long worked from 2008 through 2014 as a senior engineer and scientist at United Technologies Research Center, where his assignments included F119 and F135 engine programs used by the F-22 and F-35. While still employed, he sought positions with the Chinese Academy of Sciences, the Shenyang Institute of Automation, and other state-run institutions. S1S2
Recruiters asked Long to substantiate his experience with work documents. He agreed, traveled to China carrying extensive UTRC material, and later possessed proprietary and export-controlled records on digital devices and in his baggage. He pleaded guilty to a trade-secret conspiracy with admitted foreign-government benefit and an Arms Export Control Act offense; the court imposed time served after approximately 30 months in custody. S1S2
The F135 powers the F-35 and was among the military-engine programs in Long's United Technologies work. This is a public-domain program image, not evidence recovered in his case.
U.S. Air Force · Public domain02 / The vignette
What happened
A job application requested proof of protected work
The recruitment process collapsed the boundary between résumé evidence and employer property. After Long agreed in principle to join the Shenyang Institute of Automation, institute personnel asked him for documents and project examples supporting the claims in his application. The requested proof came from sensitive work he had performed for UTRC. S1
Military-engine files traveled with the engineer
Long took a drive containing UTRC documents to China and worked for the institute in 2014. On a later trip through Newark, investigators found a paper from a Rolls-Royce-led consortium in his baggage, while digital devices contained proprietary and export-controlled files connected to military engine development. S1S2
The plea established the foreign-government element
Long did not merely admit unauthorized possession. He pleaded guilty to conspiring to steal trade secrets while knowing or intending that the conduct would benefit a foreign government, instrumentality, or agent, as well as to exporting a defense article without a license. The resulting time-served sentence reflected about two and a half years already spent in custody. S1S2
03 / Anatomy
How access became transfer
This chain reconstructs the sequence supported by the cited record. It does not imply that every legitimate relationship follows the same path.
04 / Evidence boundary
What is established—and what is not
Established in the record
05 / Sequence
Timeline
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UTRC employment begins
Long began a senior engineering role with access to military-engine research. S1
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Institute requests work proof
After an agreement in principle, recruiters asked Long for employer documents and project examples. S1
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Guilty plea
Long admitted the trade-secret conspiracy and arms-export offense. S1
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Time-served sentence
The court sentenced Long after approximately 30 months already spent in custody. S2
06 / People and institutions
Who appears in the public record
Yu Long
Former United Technologies senior engineer and scientist
Outcome: Pleaded guilty; sentenced to time served
Shenyang Institute of Automation
State-run institute that recruited Long and requested supporting work material
Chinese Academy of Sciences
State-run institution affiliated with the recruiting institute
Originator / affected institution
United Technologies Research Center
Employer and source of the protected engineering records
Originator / affected institution
Pratt & Whitney and program partners
Developers of military-engine technology reflected in the records
07 / Consequences
Documented and attributed harm
08 / Hindsight analysis
Where leadership could have seen risk
These are our analytic judgments based on the public record, not court findings. They are framed to improve controls without treating nationality as a risk factor.
Recruiting demanded employer proof
A foreign hiring process rewarded submission of protected work samples instead of relying on sanitized descriptions and references.
Travel carried digital and paper records
The risk crossed devices, external drives, and baggage, making a single-channel control insufficient.
09 / Apply the lesson
Actions leaders can take
- companies
Sanitize work samples
Provide approved portfolios or employment verification so staff never need protected documents to prove technical experience.
- both
Review sensitive foreign recruitment
Require prompt disclosure when a foreign institution requests project files, code, drawings, or sponsor-only results during hiring.
- companies
Unify export and insider signals
Correlate travel, device activity, print events, and export-control classifications around high-risk career transitions.
10 / Source record
Sources
Links point to the public record reviewed for this file. Government releases can summarize court proceedings but remain government-authored sources; the source note identifies those limits.
- S1 government release
Chinese National Admits Stealing Sensitive Military Program Documents from United Technologies ↗
U.S. Attorney's Office, District of Connecticut · Published Dec 19, 2016 · Retrieved Aug 23, 2026
- S2 government release
Export and Sanctions Enforcement Cases: Yu Long Case Summary ↗
U.S. Department of Justice, National Security Division · Published May 26, 2017 · Retrieved Aug 23, 2026