Senior Systems Engineer (Operational Technology Infrastructure)

CSS Staffing; Omaha (NE); On-site; USD 105,000 - 155,000; Full time

Job summary

CSS is seeking two Senior Systems Engineers to support critical OT infrastructure in a highly regulated environment. You will own both technical execution and audit-ready documentation across servers, virtualization, cybersecurity, networking, and operating systems.

The role involves compliance with NERC CIP, evidence collection for audits, and mentorship of junior staff, with onsite work in Moncks Corner, SC. Strong troubleshooting and cross-functional collaboration are essential.

Qualifications

• Bachelor’s degree in Computer Science, IT, or Engineering, or equivalent.
• 5+ years of Systems/Infrastructure engineering or senior admin experience.
• Experience supporting regulated environments with audit and evidence collection.
• Familiarity with NERC CIP requirements and CSF principles.
• Strong troubleshooting and independent task ownership in an OT environment.

Responsibilities

• Administer and support VMware virtualization and server OS across data centers.
• Manage AD, GPO, security groups, and identity services; patching and hardening.
• Support backup, recovery, monitoring, and incident response; ensure compliance.
• Participate in audits, evidence collection, and change management.
• Provide leadership and mentoring to junior engineers.

Skills

Systems engineering

Infrastructure engineering

Audit support

Compliance management

Troubleshooting

Onsite work

Education

Bachelor's degree in Computer Science, Information Technology, Computer Engineering, or equivalent combination of education and experience

Tools

VMware ESXi

Windows Server

Red Hat Enterprise Linux

Active Directory

Enterprise backup solutions

Security monitoring tools

Vulnerability management tools

Check Point Firewall

Nessus

Job description

Senior Systems Engineer (Operational Technology Infrastructure) Location: Moncks Corner, SC (100% Onsite) Compensation: $105,000 - $155,000 Base Salary Target Hiring Range: $120,000 - $135,000

About the Role

Our client is seeking two experienced Senior Systems Engineers to support critical infrastructure systems within a highly available Operational Technology (OT) environment. Candidates must have experience supporting regulated infrastructure environments and be comfortable owning both technical execution and the audit evidence required to demonstrate compliance. This is a hands‑on engineering role for experienced infrastructure professionals who enjoy broad technical ownership across servers, virtualization, cybersecurity, networking, backups, and operating systems. The team supports the technology infrastructure behind mission‑critical operational systems and is responsible for ensuring reliability, security, availability, and regulatory compliance. The ideal candidate is a well‑rounded systems engineer who can independently troubleshoot complex issues, administer enterprise infrastructure, support cybersecurity initiatives, and mentor junior team members while operating within a structured and highly regulated environment.

What You'll Do

• Infrastructure Engineering Administer and support VMware virtual infrastructure across multiple data center environments. Support Windows Server and Red Hat Enterprise Linux systems, including installation, configuration, patching, upgrades, and troubleshooting. Manage Active Directory, Group Policy, security groups, permissions, and identity services. Perform server administration, operating system maintenance, vulnerability remediation, and system hardening. Support enterprise backup and recovery operations. Monitor and maintain system availability, performance, and reliability. Troubleshoot complex infrastructure, application, operating system, and connectivity issues. Participate in technology refresh and infrastructure modernization initiatives.
• Security & Operational Support Administer security tools and infrastructure supporting operational environments. Support endpoint security, malware prevention, system monitoring, and log management activities. Perform vulnerability assessments and remediation activities. Administer firewall policies and network security controls. Support incident response and root cause analysis efforts. Ensure compliance with established cybersecurity and operational procedures.
• Networking & Platform Technologies Support routing, switching, firewalls, and enterprise connectivity. Troubleshoot TCP/IP communications, network segmentation, and network performance issues. Support critical 24x7 infrastructure used within operational environments. Assist with security baseline management and control validation.
• Compliance & Regulatory Responsibilities Support NERC CIP compliance requirements within a regulated operational environment. Participate in audits, compliance reviews, self‑assessments, and evidence requests. Collect, maintain, validate, and organize compliance evidence supporting operational and cybersecurity controls. Document backup verification, patch management, vulnerability remediation, access reviews, and system changes. Operate within established change management, cybersecurity, and operational procedures. Demonstrate a clear understanding of what was performed, why it was required, and how it satisfies applicable controls and standards.
• Leadership & Collaboration Serve as a senior technical resource for infrastructure and operational support teams. Mentor less‑experienced engineers and administrators. Work independently while collaborating across engineering, cybersecurity, compliance, and operations teams. Participate in planning, maintenance activities, and continuous improvement initiatives.

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, Computer Engineering, or equivalent combination of education and experience.
• 5+ years of Systems Engineering, Infrastructure Engineering, or Senior Systems Administration experience.
• Experience supporting regulated environments with direct responsibility for compliance, audit support, controls validation, and evidence collection.
• Working knowledge of NERC CIP requirements and associated operational practices.
• Familiarity with NIST Cybersecurity Framework (CSF) principles and their application in operational environments.
• Strong experience administering: VMware ESXi Windows Server Red Hat Enterprise Linux Active Directory Enterprise backup solutions Security monitoring and vulnerability management tools
• Experience supporting highly available infrastructure environments.
• Strong troubleshooting, root‑cause analysis, and operational support skills.
• Ability to independently own technical tasks from implementation through audit‑ready documentation.
• Ability to work onsite in Moncks Corner, South Carolina.

Preferred Qualifications

• Electric utility, power generation, transmission, energy management systems, or other critical infrastructure experience.
• Check Point Firewall administration, including policy management, routing, and log monitoring.
• VMware administration and support.
• Veeam Backup & Replication.
• Nessus vulnerability management and assessment tools.
• Tripwire Enterprise and Tripwire Log Center.
• WSUS patch management.
• Symantec Endpoint Protection.
• MikroTik switches and routers.
• ICCP (Inter-Control Center Communications Protocol) familiarity.
• Experience supporting operational technology (OT), ICS, SCADA, or mission‑critical operational environments.
• CISSP, GSEC, GCIP, VMware, Microsoft, Red Hat, or related certifications.

What Makes Someone Successful

We're looking for engineers who: Take ownership from problem identification through resolution. Can administer Windows, Linux, virtualization, networking, backup, and security technologies with minimal oversight. Understand the discipline required in highly regulated environments. Know how to produce and maintain audit‑ready evidence supporting operational and cybersecurity controls. Balance infrastructure support, cybersecurity responsibilities, and compliance requirements. Learn new technologies quickly and share knowledge with teammates. Have the judgment and technical depth to support critical systems where reliability and security are essential.