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Senior Systems Administrator

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Realta Fusion Inc.

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Location:
United States , Madison

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Category:
IT - Administration

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

Be the backbone of Realta Fusion’s internal technology. The Senior Systems Administrator owns and scales the company’s IT infrastructure, ensuring our team can work securely, efficiently, and without friction as we grow. This role blends hands-on technical execution with process-building in a fast-moving startup environment.

Job Responsibility:

  • End-User Systems & IT Support (30%): In collaboration with managed service provider, configure, deploy, and maintain laptops (Mac, Windows) and peripherals for new hires and existing employees
  • Provide day-to-day IT support and troubleshooting for in-office and remote employees
  • Manage user accounts, access controls, and device lifecycle management
  • Provide off-hours support as needed
  • Identity, Licensing & Security Training (25%): Own and administer Microsoft 365 licensing, user provisioning, and permissions
  • Manage company-wide cybersecurity awareness and training platform
  • Enforce security best practices, endpoint protection, and compliance with internal policies
  • Network, Cloud & VPN Infrastructure (25%): Own and maintain office network infrastructure, including firewalls, Wi-Fi, and VPN connectivity
  • Administer and troubleshoot VPN and network components hosted in our cloud environment
  • Partner with engineering, science, and operations teams to ensure secure and reliable connectivity
  • Collaborate with dev/ops managed service provider to support our cloud environment
  • IT Processes, Documentation & Scaling (20%): Design, document, and continuously improve internal IT processes and policies
  • Establish onboarding/offboarding workflows and asset tracking
  • Serve as a key contributor to long-term IT strategy as the company scales

Requirements:

  • 7+ years of experience in systems administration or IT infrastructure roles
  • Hands-on experience managing Microsoft 365 environments and endpoint devices (Mac, Windows)
  • Strong knowledge of networking fundamentals, VPNs, and cloud-based infrastructure (AWS preferred)
  • Proven ability to troubleshoot a wide range of hardware, software, and network issues
  • Experience building and documenting IT processes in a growing organization
  • Familiarity with cybersecurity frameworks/certifications (i.e. NIST-CSF, ISO)

Nice to have:

  • Experience supporting start-up or high-growth environments
  • AWS certifications or equivalent cloud experience
  • Experience with identity and device management tools (e.g., Intune, MDM solutions, JAMF)
  • Familiarity in supporting Linux systems
What we offer:
  • Competitive compensation package, including equity stock options
  • Comprehensive benefits including health, dental, and vision insurance, plus a retirement savings plan
  • Flexible paid time off (PTO) to support work-life balance

Additional Information:

Job Posted:
February 18, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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