Senior IT Systems Administrator

RubinBrown Career•St. Louis, MO

10d

About The Position

The Senior Systems Administrator is a key member of the IT Systems Operations team, responsible for ensuring the stability, integrity, and efficient operation of the information systems that support core organizational functions. This role requires a high degree of technical expertise and strategic thinking. The Senior Systems Administrator will act as a technical leader and subject matter expert, providing advanced troubleshooting, mentoring junior staff, and identifying long-term IT solutions to align with business objectives.

Requirements

Ability to manage multiple priorities and projects simultaneously.
Demonstrated ability to influence infrastructure architecture decisions and contribute to strategic IT direction.
Plays a lead role in cross-team infrastructure projects, serving as a liaison between IT operations, cybersecurity, and business stakeholders.
Bachelor’s degree in Computer Science, Information Systems, or related field; or equivalent work experience.
6+ years of experience in systems administration or infrastructure support roles.
Expert knowledge of Windows Server environments, Active Directory, DNS, DHCP, and Group Policy.
Proficiency with virtualization platforms (e.g., VMware, Hyper-V).
Strong experience with Microsoft 365, Azure, Active Directory, and Exchange Online.
Experience implementing and managing enterprise cloud storage solutions (e.g., OneDrive, SharePoint Online).
Experience with automation tools and scripting (PowerShell, Terraform, or similar).
Strong documentation and communication skills.
Experience with modern configuration management tools (e.g., Intune, SCCM, or Autopilot)

Nice To Haves

Relevant certifications such as Microsoft Certified: Azure Administrator Associate, MCSA, VMware VCP, or similar preferred.

Responsibilities

Provide expert-level support and administration for server infrastructure, virtualization environments, storage systems, and cloud platforms (including Azure and Microsoft 365).
Act as a technical leader on complex infrastructure initiatives and projects.
Contribute to IT strategy, evaluating emerging technologies, tools, and trends to recommend and implement scalable, secure, and cost-effective solutions.
Lead initiatives for automation of routine system tasks and deployments using scripting languages such as PowerShell or Python.
Facilitate disaster recovery planning, documentation, and testing for critical systems.
Manage and maintain enterprise backup solutions and system monitoring tools.
Support and contribute to cloud migration initiatives, particularly with Microsoft and SAAS based solutions.
Collaborate with cybersecurity teams to enforce security best practices, vulnerability management, and incident response.
Perform capacity planning and performance tuning for on-premise and cloud-based systems.
Create and maintain comprehensive technical documentation, procedures, and operational runbooks.
Mentor junior systems administrators and share expertise across the technology teams, fostering knowledge transfer.
Serve as an escalation point for advanced support incidents and root cause analysis.