About You: You are a Senior-Level Systems Administrator with experience designing, implementing, securing, and supporting enterprise IT infrastructure in commercial, government, and regulated environments. You possess expertise across Microsoft 365, Active Directory, Azure/Entra ID, Windows Server, virtualization, networking, endpoint management, and cybersecurity technologies.
You are comfortable leading infrastructure modernization, cloud, and security initiatives while remaining hands-on with deployment, troubleshooting, automation, documentation, and operational support. You excel at translating business requirements into secure, scalable, and supportable technology solutions that improve reliability, compliance, and user experience.
Duties/Responsibilities: - Administer, maintain, and secure Windows and Linux Server environments across physical, virtual, and cloud infrastructure.
- Administer and manage enterprise security, networking, monitoring, systems, and network management platforms
- Administer Active Directory, Entra ID, Exchange, SharePoint, Intune, and Teams
- Configure and maintain Group Policy, DNS, DHCP, file services, identity management systems, and enterprise authentication services.
- Perform system monitoring, patch management, backup validation, performance tuning, and capacity planning.
- Deploy operating systems, applications, security baselines, and patches across enterprise devices
- Support hardware lifecycle processes, including provisioning, onboarding, offboarding, and hardware refreshes
- Support organizational cybersecurity and compliance initiatives by assisting with implementation, monitoring, documentation, and maintenance of security controls aligned with regulatory and contractual requirements
- Support vulnerability management, endpoint protection, SIEM monitoring, phishing mitigation, and incident response activities.
- Maintain secure system configurations and implement cybersecurity best practices
- Support identity security initiatives, including SSO, privileged access management, and least privilege enforcement
- Develop automation solutions using scripting and workflow automation tools.
- Integrate enterprise platforms to improve operational processes and business enablement
- Develop and maintain technical documentation, SOPs, diagrams, and knowledge base articles.
- Provide tier-3 escalation support and mentor junior IT staff.
- Assist with infrastructure modernization, cloud migration, and security improvement initiatives.
- Participate in disaster recovery, contingency planning, and after-hours maintenance activities as needed.
- Performs software installations, patches, and upgrades to operating systems and enterprise applications.
- Ensuring security and compliance of the IT infrastructure
- Providing user education and training
- Participate in technical research and development to enable continuing innovation within the enterprise infrastructure.
- Monitoring and troubleshooting system performance and issues
- Other duties as assigned
Desired Education, Certification, Skills, Capabilities:- Bachelor's degree in Information Technology, Cybersecurity, Computer Science, or related field and eight (8) years of relevant experience, or twelve (12) years of relevant professional experience in place of a degree.
- Expert knowledge and experience managing, configuring, and supporting Microsoft cloud technologies: Azure (IaaS), Azure AD, and Microsoft 365.
- Experience with secure cloud environments, including Microsoft GCC High and AWS GovCloud
- Experience managing and configuring Cisco firewalls, routers, and switches.
- Familiarity with cybersecurity and compliance frameworks, including NIST 800-171, CMMC, ISO 27001
- Relevant technical certifications preferred, including Security+, Microsoft, Networking, Cloud, or cybersecurity-focused credentials.
- Active U.S. security clearance preferred with the ability to successfully obtain and maintain the appropriate clearance level as required by organizational needs.
- Technical skills: (Operating system knowledge, Network administration, scripting and automation, Cybersecurity, Cloud Computing)
- Soft skills: (Communication, Time Management, Problem-solving, Adaptability)
Primary Work Location: Work is expected to be fully onsite in Arlington, VA.
Special Work Conditions: Occasional travel may be required; up to 10%
Security: - Must be a U.S. Citizen
- Active Secret Clearance is preferred
Salary: $130,000-$175,000/yr., based on skills, experience, clearance, technical depth, and mission alignment.
