Information Systems Security Engineer; ISSE

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Absolute Business Solutions Corp (ABSC) is not just another technology company. We’re a community of innovators, engineers, cybersecurity professionals, analysts, and business leaders working together to solve some of the nation’s most complex security challenges. For more than 20 years, we have supported critical Department of Defense (DoD), Intelligence Community (IC), and Federal Civilian missions. As we continue to grow, we’re looking for exceptional professionals ready to make a meaningful mission impact.

AFNCR ITS-2 delivers and protects the enterprise IT infrastructure supporting some of the nation’s most critical defense, command-and-control, and senior-leader operations. This is more than routine cybersecurity support: it is an opportunity to help secure the systems and networks that must remain available, resilient, and trusted when the mission matters most.

ABSC is seeking an experienced Information Systems Security Engineer (ISSE) to support the Air Force within the National Military Command Center (NMCC).

The ISSE will provide cybersecurity and security-engineering expertise for the NMCC, including technical security assessments, vulnerability management, system hardening, security architecture support, and cybersecurity risk mitigation. The successful candidate will bring hands‑on expertise with Host‑Based Security System (HBSS), Assured Compliance Assessment Solution (ACAS), Tenable Security Center, Nessus, Windows, and Red Hat Enterprise Linux environments.

Work Location: Full‑time onsite at the NMCC at the Pentagon in Arlington, VA, with adhoc telework based on mission requirements and prior client approval.

Schedule: Flexible; core hours are 7am-3pm

Security Clearance: An active TS/SCI security clearance is required.

Responsibilities

The Information Systems Security Engineer will:

• Provide cybersecurity and security-engineering services, including system security engineering, cybersecurity risk assessments, and security architecture support.
• Perform and review technical security assessments of computing environments.
• Identify system vulnerabilities, cybersecurity risks, and instances of noncompliance with established security standards and regulations.
• Develop and recommend mitigation strategies and corrective courses of action.
• Build, deploy, maintain, and patch HBSS Windows servers and ACAS Red Hat Enterprise Linux 7.9 and 8 servers.
• Build, maintain, secure, and patch McAfee ePolicy Orchestrator, Tenable Security Center, and Nessus servers.
• Create and manage Security Center accounts for vulnerability managers conducting ACAS scans.
• Analyze ACAS scan results and support the remediation of identified vulnerabilities.
• Obtain and manage required licenses for HBSS ePO and Tenable Security Center environments.
• Obtain HBSS and ACAS Kickstart ISO images from the Defense Information Systems Agency.
• Build and administer virtual servers supporting cybersecurity operations.
• Deploy, configure, and patch McAfee modules through ePolicy Orchestrator.
• Develop and configure McAfee policies appropriate to each supported environment.
• Apply Security Technical Implementation Guides to HBSS Windows operating systems, McAfee policies, and ACAS Red Hat Enterprise Linux servers.
• Configure McAfee policies to comply with applicable security benchmarks.
• Run Security Content Automation Protocol scans on Windows and Red Hat Enterprise Linux servers.
• Update Red Hat Enterprise Linux 7.9 and 8 RPM packages as releases become available.
• Establish and maintain local YUM repositories to patch…