Lead NSS Tools Engineer

Job Title: Lead NSS Tools Engineer 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 Anticipated Posting End: 7/31/2026 The Opportunity: TCS is looking for a Lead NSS Tools Engineer to serve as a Subject Matter Expert (SME). This role will report directly to the Branch Chief of Cyber Technology Services. This position is responsible for maintaining compliance with quality assurance standards and ensuring service level agreements are met or exceeded within this service area. This role is also responsible for providing technical oversight and guidance of troubleshooting efforts and solutions development executed by the team. Responsibilities: • Serve as the technical focal point for all NSS Tools tasks, operations, and projects • Serve as the Subject Matter Expert (SME) for fielded defensive cybersecurity platforms and technologies • Direct (as necessary/required for mission execution) daily operations, troubleshooting, and maintenance activities assigned to the NSS Tools work center • Coach, review, triage, and delegate assigned work to lower-level technical team members as necessary/required for effective service delivery • Design, implement, and deliver task or project-based defensive cybersecurity solutions on premise and within cloud environments. • Ensure systems, devices, and application under your responsibility and span of control meet applicable STIG/SRG and organizational configuration baselines • Monitor platform performance, logs, software version(s), and configuration drift to identify and mitigate performance, compliance, and security issues. • 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 as requested or directed • Coordinate issues with the appropriate stakeholders to ensure task completeness and overall customer satisfaction. • Provide recommendations on newly submitted customer requests. • Evaluate and report on new/emerging network/communication technologies to enhance capacity, performance and reliability of the network. • Evaluate and recommend changes and/or technology upgrades to address performance, standardization and industry best practices. Qualifications: Required: • Security Clearance: Active TS/SCI • Ability to obtain and maintain a polygraph • Demonstrated knowledge in designing, implementing, and delivering defensive cyber security solutions • Demonstrated knowledge of implementation and management of Network Detection and Response (NDR) and IDS/IPS platforms (Vectra, 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 E-Mail Security platforms (Trellix EX, Cisco SEG, Ironport, Proofpoint, Abnormal, etc) • Demonstrated advanced experience in managing baseline configurations • Demonstrated experience with researching and fielding new and innovative network detection/visibility capabilities • Familiar with DoD PKI, Kerberos, LDAP, Active Directory, Authentication (SAML, OAuth) • Network design, engineering, and implementation (Advanced Level) • Creation of network related Rough Order Magnitude (ROM) equipment lists and costing, Level of Effort (LOE) estimation for labor • Understanding of DoW, DISA, and IC standards and processes • Ability to work weekends and evening hours as needed • Ability to work independently with little direction and guidance • Ability to obtain and maintain required IAT and CSSP • 10+ years related technical experience network security technologies, tools, and techniques • 5+ years' experience with large-scale enterprise/global networks in a high paced diverse environment • Understanding and experience with the DoD Architecture Framework and other key DoD 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. 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: $99,300 - 208,600 USD 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. Click on Search Jobs to find and apply to CACI openings.