SIPRNet Administrator

Applied Research Associates, Inc. (ARA) is seeking a lead administrator for a SIPRNet capability supporting a DoD‑owned secret‑level enclave that already houses an air‑gapped software‑development environment. The successful candidate will be the sole technical owner of the SIPRNet connection side of the enclave, responsible for building, hardening, and sustaining all network and directory services required for secure SIPRNet operations. This role works directly with the Sr. Systems Administrator and the broader systems‑admin team leading engineering and sustainment efforts for the development enclave. This position is located at Eglin AFB, in the city of Valparaiso, Florida on the Gulf Coast of Florida. This position is immediate, full‑time, and onsite only. ARA is a 100% employee-owned company that offers an excellent benefits package that includes medical, dental, vision, retirement and more.

ARA's Benefits Package Includes:

• 401(k) Retirement Plan with employer matching contribution
• Employee Stock Ownership Plan
• Various insurance options including Flexible Spending Plan, Health Savings Account (HSA)
• Paid leave and holidays.

SIPRNet Administrator Key Responsibilities:

• Install, configure, and harden a dedicated Active Directory Domain Service (AD‑DS) forest-level for the SIPRNet enclave, including OU design, Group Policy, delegation, and secure replication
• Create and manage DNS zones for SIPRNet, maintain the enclave's name in the DoD SIPRNet DNS hierarchy, and configure reverse lookup zones
• Provision and maintain network services as required for enclave and SIPRNet connectivity
• Configure and manage HAIPE Type‑1 encryptors and the DISA‑approved TACLANE line that provides the enclave's SIPRNet connectivity, ensuring continuous compliance with DoD security policies
• Deploy, harden, and operate SIPRNet firewalls and DMZ infrastructure, applying DISA STIGs and DoD‑SRG controls
• Support RMF lifecycle activities (categorization, control selection, implementation, assessment, authorization, and ongoing monitoring) for the SIPRNet environment as required by the ISSM and DISA
• Produce and maintain supporting RMF accreditation artifacts and coordinate with the ISSM for CAO and PPSM workflows
• Perform continuous monitoring using

ACAS/SCAP

scans (or equivalent) and remediate findings to maintain compliance as required

• Document all configurations, playbooks, and standard operating procedures; keep network diagrams and system inventories current
• Serve as the technical point‑of‑contact for any audits, inspections, or DoD reviews of the SIPRNet connection
• Mentor and train other system administrators on SIPRNet best practices as needed

SIPRNet Administrator Required Qualifications:

• Minimum 3 years of hands‑on experience building and operating SIPRNet enclaves (preferred 5 years .

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