Senior Cybersecurity Network Defense Administrator

Position is contingent upon contract award and funding.

Sev1Tech is looking for a The Senior Cybersecurity Network Defense Administrator (Information Assurance Engineer - Senior) will be responsible for performing a variety of network defense activities in accordance with established guidelines and best practices.

The responsibilities include but are not limited to:

• Managing ACAS infrastructure, configuration, scanning, reporting, and analysis activities in accordance with the DISA ACAS Best Practices Guide
• Manage Army Endpoint Security Solution (AESS) Site Reviewer activities, DISA Whitelist, and PKI Tokens
• Performing STIG Compliance scanning and reporting, providing Ports, Protocols, & Services Management (PPSM) support, and reviewing proposed configuration changes for security impact
• In-processing and out-processing tasks, manage updates to the designated training and certification tracking system, and participate in SW Assurance reviews to ensure ACAS findings are re-mediated or appropriately documented via eMASS POA&M

Minimum Qualifications

• Active DoD Secret Security Clearance
• Cybersecurity Certification (such as Certified Information Systems Security Professional (CISSP)/Information Systems Security Engineering Professional (ISSEP)/Security+/Certified Ethical Hacker (CEH/etc.)
• Minimum 10 years' experience with Cybersecurity and Network Defense related areas
• Experience with ACAS management, including infrastructure management, configuration, scanning, reporting, and analysis
• Proficiency in managing Army Endpoint Security Solution (AESS) Site Reviewer activities
• Experience with DISA White-list management
• Knowledge of PKI Token management
• Strong understanding of DoD STIGs and ability to perform STIG Compliance scanning and reporting
• Experience providing Ports, Protocols, & Services Management (PPSM) support
• Ability to review proposed configuration changes for security impact
• Experience with in-processing and out-processing tasks related to account management functions

Desired Qualifications

• Bachelor's degree in computer science or equivalent years of experience
• Familiarity with DISA ACAS Best Practices Guide and NETCOM policies
• Familiarity with DISA Continuous Monitoring and Risk Scoring (CMRS)
• Strong analytical and problem-solving skills
• Excellent communication and coordination skills
• Experience with Army enterprise monitoring tools and practices
• Knowledge of security regulations and best industry practices
• Ability to work effectively in a team environment and collaborate with various Stakeholders
• Experience with incident response activities
• Understanding of Continuity of Operations Plans and Communication Plans
• Experience with security compliance and control documentation

About Sev1Tech LLC

Founded in 2010 and recently acquired by ERT in early 2026, Sev1Tech, an ERT Company provides IT, engineering, and program management solutions delivery to critical missions across Federal and Commercial Clients. With its acquisition by ERT, Sev1Tech expanded its ability to offer secure, mission-aligned digital solutions to support modernization, resilience and operational effectiveness for government customers operating in highly regulated mission environments. ERT and Sev1Tech together become a fully diversified engineering and federal technology solutions firm with broad reach into space, civilian, and defense markets.

Please apply directly at: https://careers-sev1tech.icims.com . For questions or to submit a referral, please contact: recruiting@sev1tech.com

Sev1Tech is an Equal Opportunity and Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.