Senior Systems Engineer with Security Clearance

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. Responsibilities 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 PowerShell 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 NetApp 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 Required Qualifications 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 PowerShell 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 Desired Qualifications 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 NetApp 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 Management and enterprise infrastructure support * #CJ Fantom Corp is a Software Development, Agile Cloud, Cyber Security (Risk Management, Assessments & Authorization (A&A)), Data, AI Platform (Computer Vision Models), Podcasting Media Services, and IT Services provider. Established in 2015, Fantom Corp serves Federal customers with top‑notch Cybersecurity Architects, Data Scientists/Analysts, Software Engineers/Developers, DevSecOps Engineers, Project Managers, Identity, Credential Access Management (ICAM) services, and Cloud‑certified practitioners. We excel in delivering emerging technologies such as Artificial Intelligence (AI) and Machine Learning (ML) with a focus on identifying trends, object detection, and classification of structured and unstructured data. Fantom Corp possesses mastery in all aspects of digital audio production. We lead in the ideation and creation of efforts for clients who want to harness the power of podcasting. We guide them in selecting the right show format for their needs and goals. As a Small Business, we possess the innovation, speed and flexibility to meet your requirements. We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us. #J-18808-Ljbffr FANTOM CORPORATION