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Systems Administrator

McCarthy Holdings, Inc.
St. Louis, MO Per Diem
POSTED ON 1/11/2026
AVAILABLE BEFORE 2/10/2026
Position Summary
 
McCarthy Holdings, Inc. is seeking a skilled and motivated System Engineer I to join our Server Operations Team. As a System Engineer I, you will play a crucial role in ensuring the stability, security, and performance of our IT infrastructure, including installation, configuration, troubleshooting, and maintenance of business-critical systems vital to daily operations. System Engineer I must adhere to the company SLA for system uptime and customer response. This position reports to the Manager of Server Operations.
 
Key Responsibilities
  • General level 3 support for help desk and end users in the areas of Server, Storage, AD Account management, Cloud operations and Microsoft 365 Administration.
  • Active Directory and Azure AD (Entra ID) basic administration including user/group management.
  • Exchange and SharePoint Online administration and support
  • Perform routine system maintenance tasks, including software updates, server patch management, vulnerability remediation, system backups and quarterly restore testing.
  • Configure, maintain, and optimize servers, both physical and virtual, to support various applications and services. Primarily Windows Server OS.
  • OKTA authentication and configuration of new SSO/SAML applications and troubleshooting authentication issues and changes.
  • Monitor system performance and troubleshoot issues proactively to ensure optimal system uptime.
  • Data archival/recovery, configuration, maintenance, and troubleshooting
  • Providing support to various groups for email searches, legal discovery, or legal hold procedures
  • Implement security best practices and remediations to protect the infrastructure from potential threats and vulnerabilities.
  • Maintain accurate and up-to-date documentation of system configurations, procedures, and troubleshooting guides
 
Qualifications
  • Proven experience as a System Administrator, System Engineer or similar role.
  • Strong listening, communication, collaboration and interpersonal skills.
  • Strong organizational skills.
  • Ability to work with a team and individually.
  • Strong desire to provide exceptional customer service.
  • Driven to evaluate and recommend continuous improvement initiatives.
 
Minimum two years’ experience with the following:
  • Strong knowledge of Windows Server Operating Systems
  • Strong understanding of security best practices.
  • Basic experience with writing PowerShell scripts to perform administrative tasks
  • Basic knowledge of Microsoft Active Directory, Azure AD and OKTA
  • Basic knowledge of Office 365 (account/mailbox creation and troubleshooting)
  • Experience with backup software/hardware operation and configuration.
 
Additional Experience and Skills that are not required but would be beneficial:
  • Virtualization technologies (VMWare ESX, Hyper-V)
  • Public Cloud platforms (AWS/Azure)
  • Okta or Entra SSO
  • Tenable, Nessus or other vulnerability management products
  • Cohesity DMaaS
  • Online storage platforms such as OneDrive & SharePoint
  • Storage Systems (SAN) such as NetApp, Tegile, or Pure
  • System and network administration in both Windows and Linux environments

 

McCarthy is proud to be an equal opportunity employer, including disability and protected veteran status.

Hourly Wage Estimation for Systems Administrator in St. Louis, MO
$38.00 to $48.00
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