System Administrator

Core Scientific; Austin (TX); On-site; USD 95,000 - 125,000; Full time

Job summary

Core Scientific, a leading provider of infrastructure for high-performance compute, seeks a strong generalist Systems Administrator with AD focus to own the health, security, and day-to-day administration of our Active Directory environment at the downtown Austin office.

You’ll collaborate with identity, security, and endpoint teams to maintain a well-governed environment and advance modern best practices across IT operations.

Qualifications

• 5+ years of hands-on systems administration experience in a professional environment.
• Very strong Active Directory expertise: domain services, Group Policy, replication, trusts, sites and services, and directory security.
• Deep experience managing domain controllers, DNS, and DHCP in a production environment.
• Strong PowerShell skills for AD automation, reporting, and bulk operations.
• Solid understanding of AD security best practices: tiered admin models, delegation, privileged access, and common attack paths (e.g., Kerberoasting, pass-the-hash).
• Experience with hybrid identity concepts and directory synchronization to cloud platforms.
• Broad generalist skills across Windows Server administration, networking fundamentals, and troubleshooting.
• Clear written and verbal communication and strong documentation habits.
• Ability to work on-site full-time in downtown Austin, TX.

Responsibilities

• Own day-to-day Active Directory administration: user, group, and computer object management, OU design, delegation, and directory hygiene.
• Design, maintain, and troubleshoot Group Policy across the environment, keeping GPOs consolidated, documented, and effective.
• Administer and maintain domain controllers, including replication health, FSMO roles, backups/recovery, and patching.
• Manage core network services tied to the directory: DNS, DHCP, and site/subnet topology.
• Harden and secure the directory: tiered administration, least-privilege delegation, privileged account management, and remediation of common AD attack paths.
• Support hybrid identity, including directory synchronization to cloud identity platforms and clean attribute/data flows.
• Automate routine directory tasks and reporting with PowerShell.
• Support day-to-day IT operations across the environment: escalated troubleshooting, server and SaaS administration, and infrastructure projects as needed.
• Participate in audits and access reviews with clear evidence from the directory.
• Document architecture, processes, and runbooks so the environment is well understood and supportable.
• Foster open, respectful, and professional communication directly within the team as well as with co-workers/ teammates and leaders across the organization.
• Performs other duties as assigned.
• undefined

Skills

Active Directory

PowerShell

DNS/DHCP

Windows Server

Hybrid identity

Group Policy

Troubleshooting

Documentation

On-site Austin

Tools

Okta

Microsoft 365

Entra ID

Intune

Jamf Pro

Slack

Jira Service Management

Job description

Who We Are

Core Scientific is a leading provider of infrastructure for high-performance compute in North America. Our mission is to accelerate digital innovation by scaling high-value compute rapidly, efficiently, and responsibly. We transform energy into high-value compute with unmatched efficiency at scale. Core Scientific is a publicly trade company (NASDAQ: CORZ).

We power AI, HPC, and other next-generation data center workloads demanding exceptional computing power, in addition to our digital asset mining operations. Our footprint consists of 11 data center campuses across seven states, housing advanced infrastructure for our customers.

What sets us apart? We have an entrepreneurial culture, a "can-do" and collaborative attitude, and we own and control our infrastructure. These strategic advantages enable us to maintain operational excellence, increase efficiency, and rapidly deploy cutting-edge innovations developed by our team of experts.

Join us and accelerate your career alongside our groundbreaking journey. We seek smart, creative, and collaborative professionals who thrive in a fast-paced, result-driven environment. Ready to be part of something exceptional?

The Job

We're looking for a strong generalist Systems Administrator whose core expertise is Active Directory. You'll own the health, security, and day-to-day administration of our AD environment — domain controllers, Group Policy, DNS/DHCP, and the directory structure that everything else depends on — while contributing across the broader IT environment as a versatile, hands-on administrator.

Directory services sit at the foundation of how our users, devices, and applications work together, so you'll partner closely with identity, security, and endpoint teams to keep the environment clean, well-governed, and moving toward modern best practices.

This position is fully on-site at our downtown Austin office.

Responsibilities

• Own day-to-day Active Directory administration: user, group, and computer object management, OU design, delegation, and directory hygiene
• Design, maintain, and troubleshoot Group Policy across the environment, keeping GPOs consolidated, documented, and effective
• Administer and maintain domain controllers, including replication health, FSMO roles, backups/recovery, and patching
• Manage core network services tied to the directory: DNS, DHCP, and site/subnet topology
• Harden and secure the directory: tiered administration, least-privilege delegation, privileged account management, and remediation of common AD attack paths
• Support hybrid identity, including directory synchronization to cloud identity platforms and clean attribute/data flows
• Automate routine directory tasks and reporting with PowerShell
• Support day-to-day IT operations across the environment: escalated troubleshooting, server and SaaS administration, and infrastructure projects as needed
• Participate in audits and access reviews with clear evidence from the directory
• Document architecture, processes, and runbooks so the environment is well understood and supportable
• Foster open, respectful, and professional communication directly within the team as well as with co-workers/ teammates and leaders across the organization.
• Performs other duties as assigned.
• undefined

Qualifications

Required

• 5+ years of hands-on systems administration experience in a professional environment
• Very strong Active Directory expertise: domain services, Group Policy, replication, trusts, sites and services, and directory security
• Deep experience managing domain controllers, DNS, and DHCP in a production environment
• Strong PowerShell skills for AD automation, reporting, and bulk operations
• Solid understanding of AD security best practices: tiered admin models, delegation, privileged access, and common attack paths (e.g., Kerberoasting, pass-the-hash)
• Experience with hybrid identity concepts and directory synchronization to cloud platforms
• Broad generalist skills across Windows Server administration, networking fundamentals, and troubleshooting
• Clear written and verbal communication and strong documentation habits
• Ability to work on-site full-time in downtown Austin, TX

Preferred

• Okta administration or integration experience (SSO, MFA, lifecycle management)
• Microsoft 365, Entra ID, and Intune administration experience
• Jamf Pro experience for macOS device management
• Slack workspace administration experience
• Jira Service Management (JSM) administration experience
• Exposure to Workday or other HRIS platforms as an upstream identity source
• Relevant certifications (e.g., Microsoft Certified: Windows Server Hybrid Administrator, Identity and Access Administrator)

Reports To

Director, IT

Location

On Site

Travel

Minimal travel between data centers may be required as needed.

Work Environment

This job operates in a professional office environment. This role routinely utilizes standard office equipment, including laptop computersand smartphones.

Physical Demands

While performing the duties of this job, the employee is frequently required to sit, stand, walk, use hands, andliftup to 50 pounds.

Position Type/ Expected Hours of Work

This is a full-time, onsite position. General hours and days of work are Monday through Friday, 8:00 a.m. to 5:00 p.m. Some nights and weekends may be required.

Supervisory Experience (Yes Or No)

No