Senior Systems Engineer

Fantom Corporation is a mission-focused organization supporting critical programs across the defense and intelligence community. We partner with our customers to deliver high-impact technical solutions while fostering a culture built on trust, expertise, and long-term career growth.

We are seeking a Senior Systems Engineer to support the administration, accreditation, and sustainment of secure enterprise infrastructure supporting mission-critical systems. This role is responsible for Windows and Linux systems engineering, virtualization, security-controlled environments, certificate management, storage administration, and Assessment & Authorization (A&A) activities.

The ideal candidate has extensive experience supporting secure enterprise Windows environments, virtualization platforms, Active Directory infrastructure, and security accreditation processes within highly secure government environments.

• Design, administer, and maintain secure Windows and Linux server environments supporting enterprise applications
• Manage Microsoft SQL Server databases, Active Directory Certificate Services (ADCS), Hyper-V environments, and enterprise virtualization infrastructure
• Support Assessment and Authorization (A&A) activities for security-controlled systems, including accreditation documentation and compliance requirements
• Administer Windows Server environments, virtual machine clusters, and enterprise backup and recovery solutions
• Develop and maintain Power Shell automation scripts to improve system administration and operational efficiency
• Manage enterprise certificate services for users, servers, and service accounts
• Configure, administer, and troubleshoot Windows Group Policy, Windows Server Update Services (WSUS), and enterprise security settings
• Administer virtualization platforms including Hyper-V and VMware
• Support secure data transfers and maintain the integrity of security-controlled environments
• Administer and maintain enterprise storage solutions, including Net App Storage Area Networks (SANs)
• Collaborate with engineering, cybersecurity, and operations teams to maintain secure and highly available infrastructure
• Troubleshoot complex infrastructure, operating system, virtualization, and storage issues
• Develop and maintain technical documentation, system procedures, and operational guidelines
• Cross-train team members and provide technical mentorship as needed
• Support IT program management activities and enterprise infrastructure initiatives

• Must be fully cleared with a recent polygraph
• Must be willing and able to work fully onsite at the location listed in this posting
• Demonstrated experience with Windows systems engineering and administration
• Experience administering:
  • Microsoft SQL Server
  • Active Directory Certificate Services (ADCS)
  • Hyper-V virtual environments
  • Virtual machine clusters
  • Microsoft Data Protection Manager
  • Power Shell scripting
  • Experience supporting Assessment and Authorization (A&A) processes for security-controlled systems
  • Experience administering Linux operating systems
  • Strong troubleshooting and problem-solving skills supporting enterprise infrastructure
  • Experience supporting secure government or enterprise IT environments
  • Excellent written and verbal communication skills

• Experience supporting security-controlled systems, enterprise hardware security modules, software, and secure data architectures
• Experience serving as a Data Transfer Officer within secure environments
• Experience administering Oracle Linux systems
• Experience administering Cisco networking equipment and security appliances, including:
  • Cisco ASA
  • Cisco Stealthwatch
  • Cisco Tetration
  • Experience managing Net App Storage Area Networks (SANs)
  • Experience managing enterprise certificate infrastructures
  • Experience cross-training and mentoring technical teams
  • Experience handling sensitive information while exercising sound judgment and discretion
  • Oracle Certified Professional (OCP) Database Administrator certification
  • Experience supporting Sponsor-specific security-controlled systems and architectures
  • Experience supporting Sponsor Assessment & Authorization (A&A) processes
  • Experience with IT Program…