Cyber System Administrator

Unity Technologies Corporation; Columbus (OH); On-site; USD 90,000 - 130,000; Full time

Job summary

UnityTec in Columbus, OH seeks a Cyber System Administrator to administer, secure, and maintain IT and OT/ICS systems, ensuring compliance with federal cybersecurity standards and supporting RMF assessments. You will implement secure configurations, manage lifecycles, and keep documentation current in coordination with engineering and cybersecurity teams.

The role covers applying DISA STIGs, DoD 8140.03, privileged access management, and collaboration with asset owners across IT and OT

Qualifications

• Required DoD-style security certifications (IAT/SA level) such as Security+ CE, CySA+, CASP+, or equivalent.
• Bachelor’s degree in information systems, CS, cybersecurity, engineering, or related field.
• At least 3 years of hands-on system administration experience (Windows and/or Linux) in enterprise or DoD environments, including virtualization (VMware).
• Experience implementing or supporting DISA STIGs, vulnerability remediation, and secure baselines.
• Understanding RMF, NIST SP 800-53, and basic network security concepts (TCP/IP, VLANs, 802.1x/port security).
• Preferred: DoD or customer environments, OT/ICS experience, Zero Trust familiarity.

Responsibilities

• System Administration & Lifecycle Maintenance: Install, configure, patch, backup, and upgrade servers, OT/ICS components; manage maintenance tasks.
• Cybersecurity Compliance & Security Controls Implementation: Apply DISA STIGs and NIST requirements; document exceptions with cybersecurity teams.
• RMF Support & Accreditation Artifacts: Provide technical evidence for RMF assessments and ATC decisions.
• Privileged Access Management & DoDM 8140.03 Requirements: Manage privileged accounts and required training; support workforce reporting.
• OT/ICS/Facilities Systems Support: Install, configure, patch, backup, test OT/ICS and facility IoT systems with engineers and asset owners.
• Secure Network Configuration & Communications Controls: Implement secure networks (VLANs, 802.1X, port security) and secure wireless/cell connectivity.
• Architecture Documentation & Configuration Management: Maintain as-built architecture and PERA alignment.

Skills

IAT/SA-level certifications

RMF/NIST knowledge

Zero Trust familiarity

Network security concepts (VLANs, 802.

Education

Bachelor’s degree in information systems, computer science, cybersecurity, engineering, or related field

Tools

VMware

Windows Server

Linux

Job description

We are seeking aCyber System Administratorto join our team. You will administer, secure, and maintain IT and OT/ICS systems, ensuring compliance with federal cybersecurity standards and supporting system accreditation activities. You will implement secure configurations, manage system lifecycles, and keep technical documentation current in coordination with engineering, cybersecurity, and customer stakeholders. This position is located in Columbus, OH.

Responsibilities include, but are not limited to:

• System Administration & Lifecycle Maintenance: Installing, configuring, hardening, patching, backing up, and upgrading physical/virtual servers, appliances, workstations, and OT/ICS components; performing recurring maintenance such as antivirus updates and backup management.
• Cybersecurity Compliance & Security Controls Implementation: Applying and enforcing DISA STIGs and NIST 800‑53/800‑82 requirements across IT and OT environments; documenting exceptions in coordination with cybersecurity teams.
• RMF Support & Accreditation Artifacts: Providing technical evidence and configuration details to support RMF assessments, cybersecurity risk reviews, and Authority to Connect (ATC) decisions.
• Privileged Access Management & DoDM 8140.03 Requirements: Conducting privileged system administration aligned with DoDM 8140.03; maintaining required accounts, completing mandated training, and supporting workforce reporting.
• OT/ICS/Facilities Systems Support: Installing, configuring, patching, backing up, and testing operational technology (OT), industrial control systems (ICS), facility IoT solutions, and associated application software in coordination with engineers and asset owners.
• Secure Network Configuration & Communications Controls: Implementing secure network architectures including VLANs, IEEE 802.1X, port security, and controlled ports/protocols/services; ensuring wireless and cellular connectivity meets FIPS 140‑3 and STIG standards.
• Architecture Documentation & Configuration Management: Developing and maintaining “as‑built” technical architecture, configuration documentation, and alignment with Purdue Enterprise Reference Architecture (PERA).

Required Qualifications:

• One or more DoDM 8140.03 baseline IAT/SA-level certifications, such as: CompTIA Security+ CE, CompTIA CySA+ or CASP+ (or equivalent advanced security certification), GIAC Security Essentials (GSEC) or similar
• At least one OS- or platform-specific Computing Environment (CE) certification such as: Microsoft (e.g., Microsoft Certified: Windows Server Hybrid Administrator Associate), Red Hat Certified System Administrator (RHCSA) or higher, VMware (e.g., VCP), Relevant vendor/database certifications (e.g., Oracle, SQL Server)
• Bachelor’s degree in information systems, computer science, cybersecurity, engineering, or related field
• A minimum of three (3) years of hands‑on system administration experience (Windows and/or Linux) in enterprise or DoD environments, including virtualization (e.g., VMware) and complex networks.
• Experience implementing or supporting DISA STIGs, vulnerability remediation, and secure baselines.
• Understanding of RMF, NIST SP 800‑53, and basic network security concepts (TCP/IP, VLANs, 802.1x/port security).

Preferred Qualifications:

• Experience in DoD or customer environments, including customer Remote VDI and Service Portal workflows.
• Hands‑on experience with OT/ICS/FRCS/Facilities IoT systems and architectures using PERA.
• Familiarity with Zero Trust (ZT) and ICAM concepts in federal/DoD environments.

Clearance Requirements:

• Must be a U.S. citizen
• Must possess a current DoD Secret clearance

UnityTec is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status.