Cybersecurity Engineer - Network Security Tools

CACI International Inc; St. Louis (MO); On-site; USD 75,000 - 158,000; Full time

Benefits offered by this job

Healthcare

Wellness

Financial benefits

Retirement

Family support

Continuing education

Time off benefits

Job summary

CACI International Inc is seeking a Cybersecurity Engineer for the Network Security Tools team to design, deploy, and maintain cybersecurity solutions across NGA networks worldwide.

The role requires TS/SCI clearance, DoD 8570 IAT II and CSSP certifications, Linux expertise, scripting, and a strong track record with network security tools and troubleshooting.

Qualifications

• Active TS/SCI clearance required.
• Ability to obtain and maintain a CI polygraph.
• DOD 8570 IAT II certification (Security+, CySA+, etc.).
• DoD 8570 CSSP Infrastructure Support certification (CEH, CySA+, etc.) required.
• Ability to work weekends and evenings as needed.
• Independent work style with minimal supervision.

Responsibilities

• Design, implement, and deliver defensive cybersecurity solutions for on‑premise and cloud environments.
• Deploy, configure, and maintain network security tools and ensure core services are running per design.
• Maintain network architecture diagrams, inventories, and licensing status.
• Provide written reports and oral briefings to contract and government leadership.
• Coordinate issues with stakeholders to ensure task completion and customer satisfaction.
• Evaluate and report on new/emerging network security technologies to improve capacity and reliability.
• Recommend configuration changes and upgrades to address performance and best practices.
• Apply networking knowledge and use tools to diagnose and resolve issues.

Skills

TS/SCI clearance

CI polygraph

Linux administration

Scripting and automation

Network security tools deployment

Defense cybersecurity

Troubleshooting networking

Education

Bachelor’s degree in Computer Science/IT/CE/EE

Tools

VectraAI

Extrahop

Darktrace

Corelight

Cisco Firepower

Trellix NX

NetWitness

Endace

Job description

• DOD 8570 IAT II certification (Security+, CySA+, etc.)

Job Title: Cybersecurity Engineer - Network Security Tools

Job Category: Information Technology

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI

Employee Type: Regular

Percentage of Travel Required: Up to 10%

Type of Travel: Local

The Opportunity

TCS is looking for a Cybersecurity Engineer for the Network Security Services – Network Defense team. This position is responsible for developing, deploying, and maintaining cybersecurity tools to defend the National Geospatial-Intelligence Agency (NGA) networks. Duties include designing, procuring, implementing, operating, sustaining, and disposing of IT security solutions on multiple networks, at multiple locations worldwide, in support of the NGA GEOINT mission.

Responsibilities

• Design, implement, and deliver task or project-based defensive cybersecurity solutions for on-premise and cloud environments.
• Deploy, configure, and maintain network security tools, ensuring software installations, updates, core services, and applied configurations are functioning within design specifications.
• Develop and maintain network architecture diagrams, inventories, and licensing status for the various capabilities within the scope of the team.
• Provide written reports and oral briefings to contract and government leadership.
• Coordinate issues with the appropriate stakeholders to ensure task completeness and overall customer satisfaction.
• Evaluate and report on new/emerging network security technologies to enhance capacity, performance and reliability of the networks.
• Evaluate and recommend configuration changes and technology upgrades to address performance, standardization, and align industry best practices.
• Apply a solid understanding of networking protocols and utilize network troubleshooting tools (tcpdump, traceroute, netstat, nslookup, etc.) to diagnose and resolve issues.

Qualifications

Required

• Security Clearance: Active TS/SCI.
• Ability to obtain and maintain a CI polygraph.
• DOD 8570 IAT II certification (Security+, CySA+, etc.)
• Ability to obtain and maintain DOD 8570 CSSP Infrastructure Support certification (CEH, CySA+, etc.)
• Ability to work weekends and evening hours as needed.
• Ability to work independently with little direction or guidance.

Desired

• Demonstrated knowledge of implementation and management of NDR and IDS/IPS platforms (VectraAI, Extrahop, Darktrace, Corelight, Cisco Firepower, Trellix NX, etc.)
• Demonstrated knowledge of implementation and management of packet broker/network visibility platforms (Gigamon, Ixia, Garland, etc.)
• Demonstrated knowledge of implementation and management of packet capture platforms (NetWitness, Axellio, Endace, etc.)
• Demonstrated knowledge of implementation and management of email security platforms (Trellix EX, Cisco Secure Email Gateway, Ironport, Proofpoint, Abnormal, etc.)
• Expertise in Linux system administration, including scripting and system automation.
• Expertise in configuring system logging, analyzing logs for troubleshooting, and implementing secure networking services.
• Familiarity with DoW PKI, Kerberos, LDAP, Active Directory, and Authentication (SAML, OAuth).
• Bachelor’s degree in Computer Science, Information Technology, Computer Engineering, Electrical Engineering, or related field.
• 7+ years related technical experience to network security technologies, tools, and techniques.
• 5+ years experience with large-scale enterprise/global networks.
• Understanding of DoW, DISA, and IC standards and processes.
• Understanding of DoW network architecture.

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.

• healthcare
• wellness
• financial
• retirement
• family support
• continuing education
• time off benefits

The Proposed Salary Range For This Position Is

$75,200-$158,100

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.