Senior Systems Administrator

The Senior Systems Administrator will own the reliability, security, and performance of critical IT infrastructure across Microsoft 365, cloud, on-premises, endpoint, identity, and collaboration platforms. This role is ideal for a hands-on infrastructure professional who can operate independently, solve complex technical issues, improve system resiliency, and help mature IT operations in a secure, compliance-focused environment.

The Senior Systems Administrator will support both daily operations and strategic infrastructure initiatives, including Microsoft GCC High and Commercial environments, Windows/Linux server administration, Azure and AWS services, endpoint support, automation, patching, monitoring, backups, incident response, documentation, and service management.

This individual will also serve as a technical escalation point and mentor for other IT team members., Systems, Infrastructure, and Platform Administration

• Administer, maintain, and optimize Windows, Linux, and macOS systems across endpoint, server, and cloud-hosted environments.
• Manage on-premises and cloud-based servers, including provisioning, configuration, patching, monitoring, backup validation, lifecycle management, and decommissioning.
• Support Microsoft 365 environments, including Microsoft GCC High and Microsoft Commercial tenants, with a focus on availability, security, identity, access, and user productivity.
• Administer core infrastructure services such as Active Directory, Entra ID/Azure AD, DNS, DHCP, Group Policy, file services, print services, certificates, and related enterprise services.
• Support Azure and AWS infrastructure, including virtual machines, storage, networking, access controls, monitoring, and cost-conscious operational practices.
• Maintain and improve system monitoring, alerting, logging, capacity planning, and performance management across business-critical infrastructure.

Security, Compliance, and Reliability

• Implement and maintain secure configuration baselines, patching standards, vulnerability remediation processes, and access control practices.
• Support security and compliance requirements for controlled or sensitive environments, including Microsoft GCC High, privileged access, audit logging, evidence collection, and change control.
• Participate in incident response, root-cause analysis, corrective action planning, and post-incident improvement activities.
• Ensure backup jobs, restore procedures, disaster recovery plans, and business continuity processes are documented, tested, and improved over time.
• Partner with security, engineering, and business stakeholders to reduce operational risk while maintaining usability and system performance.

Service Management, Support, and Documentation

• Serve as a senior escalation point for complex infrastructure, endpoint, identity, cloud, and application issues.
• Manage incidents, service requests, changes, and problem records using Jira and Jira Service Management.
• Create and maintain technical documentation, standard operating procedures, runbooks, diagrams, and knowledge-base articles in Confluence.
• Track infrastructure projects, operational tasks, and cross-functional work using tools such as Smartsheet, Jira, and Confluence.
• Communicate clearly with technical and non-technical stakeholders regarding outages, maintenance windows, risks, project status, and recommended solutions.

Application and Engineering Tool Support

• Support enterprise tools and infrastructure integrations, including Adobe Acrobat, SolidWorks PDM, GitLab, GitHub, and Jenkins Build Server where applicable.
• Assist with access management, server dependencies, certificate renewals, integrations, storage needs, backups, and troubleshooting for engineering and business applications.
• Collaborate with software, engineering, and DevOps teams to support build infrastructure, source control access, and deployment-related system dependencies.

Continuous Improvement and Technical Leadership

• Identify opportunities to automate repetitive administration tasks using PowerShell, scripting, configuration management, or workflow automation.
• Lead or support infrastructure modernization projects, migrations, upgrades, hardening initiatives, and service improvements.
• Mentor junior administrators and service desk personnel by sharing knowledge, reviewing work, and promoting operational best practices.
• Evaluate new technologies, tools, and processes that improve reliability, security, supportability, and user experience.
• Participate in scheduled maintenance, after-hours support, and on-call escalation as needed., * Must be able to walk, stand, and navigate large indoor and outdoor facilities for extended periods of time.
• Ability to lift, carry, and move materials and equipment weighing up to 25 lbs on a regular basis.
• Use of personal protective equipment (PPE) may be required in designated areas or when performing specific tasks, in accordance with safety protocols and company policy.
• May be required to climb ladders, stoop, kneel, or crouch during inspections, maintenance walk-throughs, or emergency response situations.
• Regular exposure to facility operations including noise, dust, temperature fluctuations, and industrial equipment.
• Occasional off-hours or weekend work required for emergency facility responses or projects as needed
• Requires frequent use of a computer and other standard office equipment for documentation, communication, and coordination tasks.

Do you have experience in macOS support?, * 7+ years of hands-on systems administration, infrastructure operations, or related IT experience.

• 3+ years of experience operating in a senior, lead, escalation, or infrastructure-owner capacity.
• Strong experience administering Windows Server, Active Directory, Group Policy, DNS, DHCP, file services, and enterprise identity services.
• Experience administering Linux servers and supporting mixed operating system environments, including Windows, macOS, and Linux.
• Experience supporting Microsoft 365 administration, preferably including Exchange Online, SharePoint, Teams, OneDrive, Entra ID, conditional access, and security/compliance features.
• Experience supporting cloud infrastructure in Azure and/or AWS.
• Experience administering, patching, monitoring, and troubleshooting on-premises and cloud-hosted servers.
• Working knowledge of endpoint management, system hardening, vulnerability remediation, backup operations, and disaster recovery concepts.
• Experience using IT service management and documentation tools, such as Jira, Jira Service Management, and Confluence.
• Ability to troubleshoot complex technical issues across infrastructure, identity, networking, endpoints, applications, and cloud services.
• Strong written and verbal communication skills, including the ability to document technical processes and communicate clearly with business users.
• Ability to work independently, prioritize competing requests, and operate effectively in a secure, fast-moving technical environment.

Additional Desired Qualifications

• Experience administering Microsoft GCC High environments.
• Experience with Microsoft Intune, Autopilot, Defender, Purview, Exchange Online Protection, or Microsoft security/compliance tooling.
• Experience with CMMC, NIST 800-171, ITAR/EAR-controlled environments, or other regulated infrastructure environments.
• Microsoft, AWS, Azure, Linux, VMware, CompTIA Security+, CISSP, ITIL, or related certifications.
• Experience with automation or scripting using PowerShell, Python, Bash, or similar tools.
• Experience supporting Jenkins Build Server, GitLab, GitHub, or CI/CD infrastructure.
• Experience supporting SolidWorks PDM or engineering application infrastructure.
• Experience with endpoint management for Windows and macOS environments.
• Experience with infrastructure monitoring, logging, and alerting tools.
• Experience with backup platforms, disaster recovery testing, and business continuity planning.
• Experience with Smartsheet or similar project/work management platforms.
• Experience mentoring junior team members or improving service desk escalation process.