Senior Systems Administrator

Tecolote Research • Chantilly, VA

24d • Onsite

About The Position

We are seeking a skilled and self-driven Systems Administrator with strong expertise in cloud services, Microsoft enterprise technologies, virtualization, and modern security platforms The ideal candidate will have hands-on experience with AWS, Microsoft 365/Intune, VMware, and Zscaler, and will play a key role in maintaining secure, scalable, and well-documented systems. This position is best suited to someone who enjoys solving technical challenges, improving infrastructure through automation and best practices, and operating with autonomy in a dynamic environment.

Requirements

• 4+ years' experience in systems administration or similar role
• 2+ Experience with AWS, Microsoft 365/Exchange, VMware, Zscaler
• Strong troubleshooting and problem-solving skills
• Ability to operate independently and collaboratively

Nice To Haves

• Certifications in one or more: AWS, Microsoft, VMware, or Zscaler
• Scripting/automation background
• Familiarity with compliance and regulatory frameworks relevant to IT (e.g., CMMC, NIST 800-171 or C-SCRM).
• PowerShell/Python automation skills
• Enterprise hardware management (PowerEdge, SANs, Unifi)
• Understanding of CMMC, NIST, or C-SCRM frameworks
• Experience tuning Defender, Horizon View, or IIS
• Strong documentation + communication capability

Responsibilities

• Manage AWS environments and implement infrastructure-as-code using Terraform
• Administer Microsoft 365 and Exchange Online
• Configure and manage Intune for device/application security
• Maintain and optimize Zscaler (ZIA, ZPA, ZDX)
• Implement security policies, access controls, and monitoring standards
• Maintain VMware vSphere 8 (vCenter, ESXi, Horizon View)
• Administer Windows Server roles (AD, DNS, DHCP, IIS, BitLocker)

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 501-1,000 employees