Senior Vulnerability Researcher (5G & Protocol Security)
CACI International • Florham Park, NJ • Posted June 29, 2026
About the Role
Job Title: Senior Vulnerability Researcher (5G & Protocol Security)
Job Category: Engineering
Time Type: Full time
Minimum Clearance Required to Start: Top Secret
Employee Type: Regular
Percentage of Travel Required: Up to 10%
Type of Travel: Continental US
* * *
**The Opportunity:**
We are seeking a Senior Vulnerability Researcher with deep expertise in telecommunications security, 3GPP protocols, and advanced reverse engineering. This role is ideal for a specialist who thrives on technical ambiguity and enjoys probing the 5G stack for critical flaws. You’ll play a key role in evaluating the security and robustness of proprietary telecom systems—reverse-engineering closed-box binaries, developing stateful fuzzers, and uncovering vulnerabilities that contribute directly to national cybersecurity efforts.
**Responsibilities:**
+ Develop and deploy custom stateful fuzzers for 3GPP protocols...
Job Category: Engineering
Time Type: Full time
Minimum Clearance Required to Start: Top Secret
Employee Type: Regular
Percentage of Travel Required: Up to 10%
Type of Travel: Continental US
* * *
**The Opportunity:**
We are seeking a Senior Vulnerability Researcher with deep expertise in telecommunications security, 3GPP protocols, and advanced reverse engineering. This role is ideal for a specialist who thrives on technical ambiguity and enjoys probing the 5G stack for critical flaws. You’ll play a key role in evaluating the security and robustness of proprietary telecom systems—reverse-engineering closed-box binaries, developing stateful fuzzers, and uncovering vulnerabilities that contribute directly to national cybersecurity efforts.
**Responsibilities:**
+ Develop and deploy custom stateful fuzzers for 3GPP protocols...