CSfC Systems Engineer Subject Matter Expert (SME)

Leidos•Fort Belvoir, VA

About The Position

Leidos is seeking an experienced Systems Engineer (SME) to join their Integrated Information Technology Support Services (I3TS) team. This role will support an extensive digital modernization program critical to the Defense Threat Reduction Agency (DTRA). The Systems Engineer will collaborate closely with Leidos and Government technical leadership to drive innovation, growth, and efficiencies within the I3TS portfolio. The Commercial Solutions for Classified (CSfC) Systems Engineer SME will be responsible for architecting and maintaining mission-critical Public Key Infrastructure (PKI) and Hardware Security Modules (HSMs), overseeing VMware or Nutanix hyperconverged infrastructure (HCI) with vSAN, and implementing resilient backup and disaster recovery frameworks. This position will also involve building and administering hardened Windows Server and Red Hat Enterprise Linux (RHEL) platforms, establishing robust Syslog aggregation, and enforcing rigorous Department of War (DoW) vulnerability patching and DISA STIG compliance to sustain full Authorization to Operate (ATO). Additionally, the role will assist with automating gold-image provisioning via SCCM.

Requirements

Bachelor's degree or higher in Computer Science, Information Technology, Engineering, Engineering Management, Management Information Systems, or related STEM degree program, and 12-15 years of prior relevant experience or Masters with 10 – 13 years of prior relevant experience. May possess a Doctorate in technical domain. Specific experience, education and training may be considered in lieu of degree.
12+ years of progressive systems engineering experience within DoD/DoW, federal, or defense contractor enterprise environments.
Active TS/SCI Clearance
Active DoD 8570.01-M / DoD 8140 IAT Level II or III baseline certification (e.g., Security+ CE, CySA+, CASP+, or CISSP).
Active Computing Environment certification, including one of: VMware VCP/VCAP, Nutanix NCP, Red Hat Certified Engineer (RHCE), Microsoft Certified: Windows Server Hybrid Administrator Associate
Direct experience drafting CSfC Key Management Plans (KMPs) and Continuous Monitoring Plans (CMPs) for NSA CSfC PMO approval.
Proficiency with PowerShell, Bash, and Ansible for automated STIG remediation, configuration drift detection, and certificate deployment
Advanced configuration of syslog daemons (Rsyslog, Syslog-ng) and forwarding architectures to enterprise SIEM platforms (e.g., Splunk, Elastic).

Nice To Haves

Experience Designing, deploying, and maintaining IT infrastructures for DTRA or other DoW organizations

Responsibilities

Architect, deploy, and maintain CSfC infrastructure operating within Black/Gray/Red networks.
Design, configure, and maintain multi-layered CSfC architectures in alignment with NSA Data-At-Rest (DAR) and Mobile Access (MA) Capability Packages.
Architect, deploy, maintain Certificate Authority (CA), Online Certificate Status Protocol (OCSP) responders, and hardware-backed key protection via Hardware Security Modules (HSMs) in accordance with CSfC Key Management Requirements.
Build, manage, and optimize virtualized compute and storage fabrics utilizing VMware vSphere / ESXi or Nutanix AHV with vSAN/distributed storage.
Design resilient, air-gapped backup and disaster recovery (DR) pipelines.
Deploy, configure, and administer hardened Microsoft Windows Server (Active Directory, DNS, Group Policy) and Red Hat Enterprise Linux (RHEL) systems.
Establish centralized, tamper-resistant Syslog and audit logging infrastructure across all network and system devices, hypervisors, and operating systems to support continuous monitoring and SIEM ingestion.
Understand cross-domain systems and forwarding log data through it to a centralized SIEM.
Build and maintain automated OS deployment and gold image pipelines using Microsoft Configuration Manager (MCM/SCCM) for CSfC End User Devices (EUD).
Apply and validate patching and STIGs across all virtual and physical infrastructure.
Execute vulnerability scans, track IAVMs, and remediate findings to maintain Authorization to Operate (ATO).