CSfC Systems Engineer Subject Matter Expert (SME)

Leidos; Fort Belvoir (VA); On-site; USD 131,000 - 237,000; Full time

Job summary

Leidos is seeking an experienced Systems Engineer (SME) to join the I3TS team, supporting a critical DoD modernization program for DTRA. You will design, deploy, and maintain CSfC infrastructure, PKI/HSM, and hardened Windows and RHEL platforms, with automated image deployment and centralized logging for SIEM.

Required: TS/SCI clearance, DoD 8570 IAT Level II/III certs, and hands-on CSfC KMP/CMP experience. This role is US-based and on-site at Fort Belvoir.

Qualifications

• Bachelor's degree or higher in a STEM field with extensive relevant experience or a Master’s with substantial relevant experience.
• 12+ years of progressive systems engineering experience in DoD/DoW, federal, or defense contractor environments.
• Active TS/SCI clearance and DoD 8570.01-M / 8140 IAT Level II or III baseline certification.

Responsibilities

• Architect, deploy, and maintain CSfC infrastructure within secure networks.
• Design, configure, and maintain multi-layer CSfC architectures per NSA data and MA packages.
• Manage CA/OCSP/HSMs for secure key management and PKI infrastructure.

Skills

CSfC

PowerShell

Bash

Ansible

SIEM

Automation

Education

Bachelor's degree or higher in STEM

12-15 years of relevant experience or Masters with 10-13 years

Tools

VMware vSphere/ESXi

Nutanix AHV

vSAN

SCCM / MCM

RHEL

Windows Server

Job description

Description

Leidos is seeking an experienced Systems Engineer (SME) to join our Integrated Information Technology Support Services (I3TS) team, who will support an extensive digital modernization program critical to Defense Threat Reduction Agency (DTRA). The Systems Engineer will work closely with the Leidos and Government technical leadership team to help drive innovation, growth, and efficiencies within the I3TS portfolio.

Primary Responsibilities:

TheCommercial Solutions for Classified (CSfC) Systems Engineer SMEwill architect and maintain mission-criticalPublic Key Infrastructure (PKI)andHardware Security Modules (HSMs), overseeVMware or Nutanix hyperconverged infrastructure (HCI) with vSAN, and implement resilient backup and disaster recovery frameworks. This role will also build and administer hardenedWindows Server and Red Hat Enterprise Linux (RHEL)platforms, establish robustSyslog aggregation, and enforce rigorousDoW vulnerability patching and DISA STIG complianceto sustain full Authorization to Operate (ATO), and assist with automating gold-image provisioning viaSCCM.

Core 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.

• Understanding of 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).

Basic Qualifications

• 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 priorrelevant 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).

Preferred Qualifications

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

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Pay Range:

Pay Range $131,300.00 - $237,350.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.