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Global 7w PTO

  • Administer corporate Microsoft infrastructure including Active Directory, DNS, DHCP, PKI, and Group Policy.
  • Manage access platforms such as Atlassian (Jira, Confluence), 1C/ERP, Google Workspace, and Slack.
  • Support VDI and terminal server farms, resolve incidents, and participate in infrastructure projects.

Active Directory Windows Server PowerShell Linux

20 jobs similar to Senior System Administrator

Jobs ranked by similarity.

$112,000–$179,000/yr
US

  • Administer, configure, and troubleshoot Windows Server systems (2016-2025) and Microsoft Active Directory, including group policies, DNS, and domain controllers.
  • Utilize scripting languages (PowerShell/VB) to automate system administration tasks and maintain documentation for system configurations and procedures.
  • Collaborate with cross-functional teams in a fast-paced environment, managing multiple tasks and supporting incident resolution for critical issues.

Peraton is a next-generation national security company that delivers mission-critical solutions across land, sea, space, air, and cyberspace. As a leading mission capability integrator, the company supports essential government agencies and all branches of the U.S. armed forces with a team focused on solving complex challenges.

  • Administer Windows Server 2016, 2022, and 2025 environments, including Active Directory, DNS, DHCP, and Failover Clustering.
  • Manage Google Cloud Platform services such as Compute Engine, VPC, IAM, and Cloud Storage, and automate tasks with PowerShell.
  • Ensure high availability, security, and operational excellence through monitoring, incident resolution, and root cause analysis.

Tieto Tech Consulting is a Nordic technology consultancy that helps businesses transform through digital solutions. As one of the largest tech companies in the Nordics, it fosters an open culture with professional growth and work-life balance.

US

  • Design, implement, support, and optimize enterprise infrastructure across Windows Server, VMware, storage, and cloud platforms including AWS and Azure.
  • Strengthen identity, security, and resiliency across Active Directory and Microsoft Entra through modern authentication and disaster recovery planning.
  • Advance automation through PowerShell and emerging technologies, partnering with development teams on DevOps practices for reliable application delivery.

The Bancorp is a financial services company that has spent over 25 years driving innovation in fintech, providing banking capabilities for fintech solutions, institutional banking, and lending. The company fosters a culture of urgency and rigor, with a small team handling enterprise-scale infrastructure.

Canada

  • Provide internal IT support across end-user computing, Microsoft 365, identity, and technology infrastructure.
  • Administer and troubleshoot Microsoft 365 services including Exchange Online, Teams, SharePoint, and security settings.
  • Support Windows Server, Active Directory, endpoint management, and contribute to automation projects using PowerShell.

Quadbridge is a fast-growing North American IT solutions provider that empowers businesses through strong partnerships with leading technology providers. With offices in Kitchener, Montreal, and Vancouver, they foster an energetic, collaborative workplace where ambitious teammates thrive.

Europe

  • Administer and troubleshoot Windows and Linux servers, Hyper-V, and VMware environments.
  • Diagnose and resolve customer incidents involving VPS, dedicated servers, and connectivity.
  • Participate in upgrades, migrations, and infrastructure improvement projects with clear documentation.

The company provides VPS and dedicated server hosting for FX brokers and traders. It is a small organization seeking a reliable, hands-on contractor to support customer-facing infrastructure.

$32–$43/hr
US

  • Maintain, support, and optimize enterprise applications, servers, and cloud infrastructure including AWS and Azure.
  • Diagnose and resolve infrastructure issues, manage backups, and automate tasks using PowerShell scripting.
  • Provide responsive technical support, maintain documentation, and collaborate with distributed teams to improve system reliability.

Jobgether is an AI-powered job matching platform that connects candidates with hiring companies. They use technology to ensure fair and efficient application reviews, and operate with a focus on innovation and professional growth.

US

  • Administer and maintain Microsoft Windows Server environments, including physical, virtual, cloud, and on-premises infrastructure, while ensuring high availability and security.
  • Monitor system health, server performance, and application availability using enterprise tools like Dynatrace and Splunk, and proactively resolve issues.
  • Support integration across enterprise applications, cloud platforms, and mainframe systems, and collaborate with VA leadership, cybersecurity teams, and third-party vendors.

Planned Systems International (PSI) is an Enterprise IT services company that designs, builds, secures, and operates cutting-edge software solutions for Federal Government organizations. As a federal contractor with a focus on mission-critical systems, PSI fosters a culture of collaboration, security, and operational excellence.

$80,000–$128,000/yr
US

  • Administer, secure, and optimize Windows Server environments while leading cloud migration initiatives to modern architectures.
  • Maintain detailed documentation, contribute to governance frameworks, and provide technical guidance throughout cloud modernization efforts.
  • Monitor, troubleshoot, and resolve system performance issues, applying automation and best practices for streamlined operations.

Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the galaxy. As the world's leading mission capability integrator and transformative IT provider, we deliver trusted solutions to protect our nation and allies.

US

  • Serve as a subject matter expert for Atlas Technica’s multitenant technology solutions.
  • Provide escalation and second-line support to end users and other Atlas Technica team members.
  • Identify manual or repetitive processes and develop opportunities for automation and optimization.

Atlas Technica provides IT management, user support, and cybersecurity for hedge funds and investment firms. Founded in 2016, the company has grown consistently and maintains a culture that values ownership, execution, growth, and camaraderie.

$23–$27/hr
US

  • Monitor ticketing system service boards, inbound email, and phone calls to support multiple customer environments.
  • Troubleshoot basic end-user desktop issues and act on requests according to defined client procedures.
  • Self-manage tasks, create workflow incidents, and serve as an escalation point for associate technicians.

Trace3 is a leading Transformative IT Authority, providing unique technology solutions and consulting services to clients. The company employs over 1,200 people across the United States, fostering a startup-like culture with the advantages of a scalable business.

US

  • Administer and maintain cloud infrastructure across AWS and Microsoft Azure, ensuring reliability, security, and compliance.
  • Manage Microsoft 365 tenant, including identity management, user lifecycle, and collaboration tools.
  • Automate administrative tasks using scripting (PowerShell, Bash, Python) and support security compliance efforts.

DEFCON AI is an insights company that leverages artificial intelligence, mathematical optimization, data analytics, and software engineering for resilient optimization of complex systems. It is a small, fast-moving team operating across commercial and government cloud environments.

$85,000–$100,000/yr
US

  • Install, configure, and maintain Windows Server OS and associated software on physical and virtual hardware.
  • Support VMware vSphere and transition workloads into Azure, leveraging cloud-native tools for system health and compliance.
  • Troubleshoot Tier 3 incidents, automate tasks with Ansible, and provide 24/7 remote support.

Epsilon provides IT solutions and services, now part of AMERICAN SYSTEMS. They foster a dynamic, collaborative environment with expanded resources, focusing on innovation and customer success.

$38–$40/hr
US

  • Provide remote technical support for hardware, software, and connectivity issues.
  • Troubleshoot Microsoft 365, Active Directory, and Windows operating system problems.
  • Document support activities and escalate complex incidents to appropriate teams.

Jobgether uses an AI-powered matching process to connect candidates with hiring companies. As a partner for this role, they manage applications and next steps for a small, collaborative remote workforce.

US 12w maternity 12w paternity

  • Create and maintain end user accounts and mailboxes in Active Directory and Office 365, including deprovisioning and software license management.
  • Conduct monthly user audits, assist with IT onboarding for remote employees, and maintain knowledgebase articles and SOPs.
  • Collaborate with Infrastructure, Security, and Desktop Support teams on user and system audits, acting as an escalation point for account issues.

National Debt Relief helps consumers overcome overwhelming debt through debt settlement and financial education. Founded in 2009, the company has helped over 450,000 people settle more than $10 billion in debt and is rated A+ by the BBB, fostering a team-oriented culture with growth opportunities.

$35–$40/hr
US

  • Provide first-line technical support to employees via phone, email, chat, and ticketing system.
  • Troubleshoot and resolve hardware, software, network, and Microsoft 365 issues.
  • Install, configure, and maintain desktops, laptops, mobile devices, and peripherals.

Parametrix is a 100% employee-owned consulting firm that helps clients deliver resilient infrastructure, vibrant communities, and sustainable solutions. It is a team of professionals including engineers, planners, and scientists, recognized as a top workplace with a culture that values work-life balance and professional growth.

$73,600–$125,100/yr
US

  • Leads and participates in IT infrastructure projects, including design, deployment, and maintenance of server systems, cloud services, and virtualization platforms.
  • Oversees deployment of IT infrastructure components such as Windows, Linux, and virtualized environments, implementing updates and upgrades for performance and security.
  • Develops backup and disaster recovery plans, scripts in PowerShell for automation, and implements IaC principles with tools like Terraform.

US Anesthesia Partners is a healthcare organization providing anesthesia services. The company has a large-scale IT infrastructure team and emphasizes a collaborative culture.

US

  • You will perform restoration and recovery efforts for clients after cyber incidents, working closely with DFIR teams.
  • You will utilize expertise in Active Directory, PowerShell, and virtualization technologies to restore compromised systems.
  • You will provide after-hours support and maintain a clear record of recovery actions.

Surefire Cyber is a cybersecurity incident response firm that delivers swift recovery from cyber incidents such as ransomware and data theft. Our team of industry veterans fosters a client-centric culture focused on continuous learning and collaboration.

Mexico Unlimited PTO

  • Provide technical support across Windows, macOS, and Linux environments.
  • Install, configure, and maintain workstations, software, and IT equipment.
  • Manage and prioritize technical requests through ticketing systems such as Jira.

The company is a partner organization seeking a System Administrator to support its global workforce. It offers a fully remote work environment with a collaborative and respectful international team culture.

US

  • Provide frontline technical support to Cloudskope customers via phone, email, and web.
  • Own and manage the customer experience from problem identification to full resolution.
  • Collaborate with subject matter experts and engineering teams to resolve complex issues.

Cloudskope is a cloud-based technology company that provides IT services and support to businesses. The company is rapidly expanding and fosters a culture of customer obsession, growth mindset, diversity, and collaboration.

$55,300–$88,400/yr
US

  • Monitors and maintains IT infrastructure to ensure high availability and performance.
  • Diagnoses and resolves complex hardware, software, and network issues.
  • Plans and executes system upgrades, patches, and security measures to protect data.

US Anesthesia Partners is a healthcare organization that provides anesthesia services across the United States. The company employs a large team and fosters a collaborative culture focused on patient care.