Cyber Software Engineer

CACI; Florham Park (NJ); On-site; USD 79,000 - 163,000; Full time

Job summary

CACI seeks engineers to advance cyber tools and demonstrations in support of DoD/IC missions. The role involves designing prototypes, integrating experiments, and collaborating across disciplines to transition capabilities into operations.

Applicants should have active SECRET clearance, 2+ years in cyber R&D, strong Python/C++ skills, and experience with networking concepts and ML tools. This position is based in Florham Park, NJ, with an emphasis on fast‑paced, research‑driven environments.

Qualifications

• 2+ years in software design, cybersecurity R&D, or related fields.
• Active SECRET clearance.
• Background in networking, distributed systems, or cyber operations concepts.
• Proficiency in Python and C/C++.
• Familiarity with networking modeling and simulation capabilities.
• Experience with Python ML libraries and CPU/memory profiling.
• Knowledge of TCP/IP, TLS and socket programming.

Responsibilities

• Assist in designing and developing innovative cyber tools and prototypes for next‑gen cybersecurity and networking capabilities.
• Support integration and demonstration of experimental capabilities for customer engagements, including capability demonstrations.
• Assist in implementing and evaluating algorithms, automation approaches, analytics, and modeling for cyber missions.
• Help design and implement realistic cyber‑physical test environments to measure resilience and performance.
• Collaborate with software, systems, and data science teams to transition prototypes into operations.
• Prepare technical docs, status reports, experiment plans, and demonstration materials.
• Participate in technical reviews, planning sessions, and cross‑org coordination with CS&T leadership.

Skills

Python

C/C++

Networking concepts

Algorithms & DS

Socket programming

Code optimization

ML libraries (PyTorch, TensorFlow, sc‑

Tools

Virtual environment management

Job description

The Opportunity

Join the Cyber Science & Technology (CS&T) team supporting advanced research, development, experimentation, and operational support to tackle challenges in networking and cybersecurity. CS&T engineers help design, prototype, and transition cutting‑edge capabilities that enhance national security missions. You will contribute to mission‑driven R&D, including customer‑aligned demonstrations, internal IRAD efforts, and cyber capability development supporting programs and customers across the DoD and IC.

Responsibilities

• Assist in the design and development of innovative cyber tools, techniques, and prototypes that advance next‑generation cybersecurity and networking capabilities.
• Support integration and demonstration of experimental capabilities for customer engagements, including planning and execution of capability demonstrations.
• Assist in implementing and evaluating algorithms, automation approaches, analytics, and modeling techniques relevant to cyber missions.
• Assist with the design and implementation of realistic cyber‑physical test environments to measure system resilience, performance, and operational utility.
• Collaborate with software engineers, systems engineers, data scientists, and mission operators to transition prototypes into operational workflows.
• Prepare technical documentation, status reports, experiment plans, and demonstration materials for internal and external stakeholders.
• Participate in technical reviews, program planning sessions, and cross‑organizational coordination with CS&T leadership.

Qualifications

Required:

• 2+ years of hands‑on experience in software design & development, cybersecurity R&D, systems analysis, or capability development.
• Active SECRET clearance.
• Background in networking, distributed systems, or cyber operations concepts.
• Proficiency in Python and C/C++.
• Familiarity with networking and cyberspace modeling & simulation capabilities.
• Ability to work in research‑oriented, fast‑moving environments with multidisciplinary teams.
• Knowledge in Algorithms & Data Structures.
• Understanding of networking concepts and protocols. (E.g., TCP/IP, TLS)
• Systems engineering experience including profiling and code optimization (CPU, memory, latency).
• Experience with Python – incl. Pytorch, tensorflow, sklearn, scipy, virtual environment management.
• Experience with network programing and protocol: Socket programing such as TCP/UDP, routing protocols, L2/L3 tunneling.

Desired:

• Experience supporting government research-oriented customers or service cyber components.
• Experience developing cyber‑physical test ranges, simulation environments, or digital twins.
• Familiarity with orchestration frameworks, cloud environments, or advanced analytics.
• Experience in computer vision, machine learning, mathematical optimization, understanding of video encoding.
• Experience working on multithreaded, distributed high-performance systems.
• Active Top Secret clearance.

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:

$79,400 - $162,700

CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.