The Opportunity:We are seeking a Senior Vulnerability Researcher with deep expertise in cloud-native architecture, container runtimes, and advanced binary analysis. This role is ideal for a low-level expert who thrives on technical ambiguity and enjoys hunting for vulnerabilities within the "DNA of the cloud." You will use automated reasoning and manual deep-dives to uncover escapes and logic flaws in Kubernetes infrastructure, playing a key role in evaluating the security of critical distributed systems and contributing directly to national cybersecurity efforts.Responsibilities:
- Conduct deep-dive research into OCI runtimes (runc, crun) and Linux kernel primitives (namespaces, cgroups, eBPF) to identify breakout and privilege escalation paths.
- Perform static and dynamic analysis on compiled binaries (Go, Rust, C++) using IDA Pro, Ghidra, or Binary Ninja to map undocumented logic and potential security issues.
- Build and maintain custom fuzzing harnesses (e.g., AFL++, libFuzzer) to stress-test gRPC interfaces, service mesh components, and microservices.
- Utilize concolic execution tools (e.g., Angr, Manticore) to automate the discovery of complex execution paths and bypass security checks.
- Investigate edge-case behaviors in containerized environments and low-level system initialization logic to reveal hidden attack surfaces.
- Develop custom tools and scripts (primarily in Python3) to automate research workflows, protocol decoding, and memory analysis.
- Document findings clearly and translate technical complexity into actionable reports for security and engineering teams.
- An active Top Secret clearance.
- 7+ years of professional experience in vulnerability research, software exploitation, or low-level engineering.
- Expert-level proficiency in Go, Rust, and C/C++.
- Strong command of Python3 for scripting and automation of research tasks.
- Deep understanding of x86/ARM assembly and memory corruption primitives.
- Proven track record of finding vulnerabilities in distributed systems, virtualization layers, or container runtimes.
- Hands-on experience with disassembly and decompilation tools (e.g., IDA Pro, Ghidra, Binary Ninja) and debugging tools (GDB).
- Detailed understanding of Linux kernel internals, specifically namespaces, cgroups, and the container execution model.
- Experience with automated bug-hunting techniques, including fuzzing and symbolic/concolic execution.
- An active SCI clearance is highly desired.
- Experience with Kubernetes security architecture and service mesh implementations (Istio, Linkerd).
- Familiarity with hardware-assisted isolation technologies and TEEs (Trusted Execution Environments).
- Ability to build scalable security tooling and infrastructure to support analysis workflows in a team setting.
- Background in cloud provider security (AWS, Azure, or GCP) and underlying hypervisor technology.
What You Can Expect:
A culture of integrity.
At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.
An environment of trust.
CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.
A focus on continuous growth.
Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.
Pay Range:
There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.
The proposed salary range for this position is:
$113,200 - $237,800Skills Required
- 7+ years of professional experience in vulnerability research, software exploitation, or low-level engineering.
- Expert-level proficiency in Go, Rust, and C/C++.
- Strong command of Python3 for scripting and automation of research tasks.
- Deep understanding of x86/ARM assembly and memory corruption primitives.
- Proven track record of finding vulnerabilities in distributed systems, virtualization layers, or container runtimes.
- Hands-on experience with disassembly and decompilation tools (e.g., IDA Pro, Ghidra, Binary Ninja) and debugging tools (GDB).
- Detailed understanding of Linux kernel internals, specifically namespaces, cgroups, and the container execution model.
- Experience with automated bug-hunting techniques, including fuzzing and symbolic/concolic execution.
CACI International Inc Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about CACI International Inc and has not been reviewed or approved by CACI International Inc.
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Healthcare Strength — Pay is supported by a broad set of health-plan options across multiple national carriers, with telemedicine and tax-advantaged accounts included. Dental and vision choices are also described as multi-option, which strengthens overall coverage breadth.
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Leave & Time Off Breadth — Flexible Time Off is available for many salaried-exempt roles, while hourly roles accrue PTO, creating multiple time-off pathways by employment class. Paid disability coverage, fixed holidays, and paid leave programs (including parental leave and other leave types) further round out time-off and leave coverage.
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Retirement Support — Retirement support includes a 401(k) match structure described as 50% up to 8% of pay (effective 4%) and an Employee Stock Purchase Plan with a discount. Tuition reimbursement and certification support also add to the overall rewards package that complements core retirement benefits.
CACI International Inc Insights
What We Do
CACI’s approximately 23,000 talented employees are vigilant in providing the unique expertise and distinctive technology that address our customers’ greatest enterprise and mission challenges. Our culture of good character, innovation, and excellence drives our success and earns us recognition as a Fortune World's Most Admired Company. As a member of the Fortune 1000 Largest Companies, the Russell 1000 Index, and the S&P MidCap 400 Index, we consistently deliver strong shareholder value. Visit us at www.caci.com.
