System Administrator (hybrid - Charleston, SC)

GuideIT•Charleston, SC

8d•Hybrid

About The Position

GuideIT is seeking a highly skilled and motivated System Administrator to administer, maintain, and support client server and cloud infrastructure under the direction of the client’s designated lead. The role focuses on systems build-out, documentation, support, and deployment of new environments and sites. The administrator will work across Windows Server, Active Directory, AWS, Azure, Microsoft 365, and supporting network services, while maintaining secure, reliable, and high-performing systems. The position includes system maintenance and upgrades, performance and capacity monitoring, backup and disaster recovery administration, automation of recurring tasks, and compliance with configuration and change-management policies. The administrator will collaborate with the security team, provide escalation-level support within strict SLA windows, mentor junior administrators, and contribute to runbooks, standards, and knowledge-base documentation. The role is hybrid in Charleston, South Carolina, with remote work within the US also considered and occasional travel to customer locations estimated at 25%. On-call participation and scheduled after-hours maintenance are required.

Requirements

At least 5 years of hands-on system administration experience in enterprise or managed services environments.
Expertise in Windows Server administration, including Active Directory, Group Policy, DNS, DHCP, certificate services, and MFA.
Hands-on experience administering AWS infrastructure, including EC2, S3, VPC, IAM, Route 53, and CloudWatch, plus secondary working knowledge of Microsoft Azure.
Proficiency administering Microsoft 365, including Exchange Online, SharePoint Online, OneDrive, Teams, Intune, and Entra ID (Azure Active Directory).
Working knowledge of networking technologies, including routers, switches, and firewalls such as Cisco, Meraki, and Palo Alto.
Understanding of routing, switching, and VPN technologies, as well as TCP/IP, DNS, DHCP, SMTP, IMAP, POP3, and other communication protocols.
Experience using PowerShell or other scripting tools to improve administrative efficiency.
Experience with virtualization platforms such as VMware vSphere or Hyper-V.
Strong familiarity with ITIL standards and maintaining compliance in regulated environments.
Knowledge of ticketing systems and proven ability to manage and resolve tickets promptly.
Strong communication and interpersonal skills, including the ability to interact effectively across teams and with clients.
Availability to participate in an on-call rotation and perform maintenance during scheduled after-hours windows.
Authorized to work in the US.
Bachelor’s degree or an equivalent combination of education and relevant experience.

Nice To Haves

Microsoft certification such as AZ-104 (Azure Administrator Associate) or MS-102 (Microsoft 365 Administrator Expert).
AWS certification such as Certified SysOps Administrator – Associate or Certified Solutions Architect – Associate.
ITIL training or hands-on experience.
Experience with monitoring and observability tools for system, cloud, and network performance.
Familiarity with patch management and endpoint configuration processes.
Experience with Linux systems administration, including RHEL or Ubuntu.
Experience with infrastructure-as-code and configuration-management tooling such as Terraform, Ansible, Bicep/ARM, or CloudFormation.
Exposure to backup and disaster recovery platforms such as Veeam, Rubrik, Azure Backup, or AWS Backup.

Responsibilities

Administer, maintain, and support server and cloud infrastructure as directed by the client’s designated lead.
Provide systems build-out, documentation, support, and new environment and site deployments.
Deploy, configure, and maintain Windows Server, Active Directory, DNS, DHCP, Group Policy, and file and print services.
Administer AWS compute, storage, networking, and identity services, including EC2, S3, EBS, VPC, IAM, Route 53, and CloudWatch.
Support Azure IaaS, Entra ID, and hybrid identity and directory synchronization.
Administer Microsoft 365 workloads, including Exchange Online, SharePoint Online, OneDrive, Teams, and Intune.
Support network services such as VPNs, load balancers, and firewall policy changes.
Perform system maintenance and upgrades, including service packs, patches, hot fixes, and security baselines across on-premises and cloud environments.
Monitor system, platform, and network performance to ensure availability and reliability.
Conduct resource monitoring, trending, and capacity planning across server, storage, and cloud workloads, including cloud cost and consumption review.
Administer backup, replication, and disaster recovery processes, and participate in periodic restore testing.
Automate recurring administrative tasks using PowerShell, Bash, or comparable scripting and infrastructure-as-code tooling.
Follow configuration and change-management policies, ensuring changes are reviewed, approved, and successfully implemented.
Collaborate with the security team to select and implement security tools, policies, and procedures, including identity, endpoint, and cloud posture controls.
Provide escalation-level technical support for system, cloud, and network-related issues within strict SLA windows.
Mentor junior administrators and support staff, and contribute to runbooks, standards, and knowledge-base documentation.
Participate in an on-call rotation and perform maintenance during scheduled after-hours windows.
Travel occasionally to customer locations as needed.