Senior Industrial Control Systems (ICS) Administrator

Job Description
BAE Systems, one of the world's leading defense contractors, is hiring a Senior Industrial Controls/Operational Technology (OT) System Administrator to support the Holston Army Ammunition Plant (HSAAP) in Northeast Tennessee.
We are looking to hire an experienced OT Systems Administrator to help develop, manage, and maintain our company's Operational Technology (Process Controls) systems. The individual will work alongside the Holston control systems support team to support continuous operations and modernization projects for the manufacturing facility. Ability to support a 24/7 operation with after-hour on-call support included. This role requires regular presence in a manufacturing or fabrication environment. The incumbent must be able to access and safely navigate production areas which may include climbing, kneeling, stooping, and working in confined spaces. Must also be able to comply with all requirements including the use of required personal protective equipment (PPE) in accordance with company policy.
OT Systems Administrator Responsibilities:

• System Administration: Install, maintain, and troubleshoot Windows/Linux OT computer systems, servers, and software, including the management of custom Windows Applications and the use of PowerShell for automation.
• Network and Infrastructure: Manage Cisco networking equipment and monitoring tools, ensuring the stability of on-premise and air-gapped environments.
• Virtualization and Storage: Administer Hyper-V/VMware (Clients and Hosts) and manage network storage, file transfers, and data backup/restoration using systems such as Veeam/Exagrid.
• Industrial Automation: Support Process Controls and Industrial Automation by utilizing familiarity with Process Automation Protocols (Profinet, Ethernet/IP, Modbus TCP/IP) and Fieldbus Protocols (Profibus, Modbus).
• Application Support: Maintain and administer SQL Server/MS Access databases and support HMI/SCADA development (e.g., PlantPAx, PCS7, Ignition).
• Security and Compliance: Integrate modern security solutions (including MyID/MFA) with existing control systems, assist the Cybersecurity team with incident response, support auditing, and manage patching/upgrading of OT equipment via SCCM and/or WSUS.
• User and Policy Management: Administer Windows Domain policies, user accounts, and Group Policies; provide Help Desk support for common user issues.
• Operational Support: Work closely with manufacturing to maintain continuous operations, identify future needs, and support modernization projects by specifying and designing resilient computer/server solutions.
• Documentation and Standards: Maintain detailed computer/server documentation and stay current on the latest industry standards to drive continuous improvement.
• Physical Requirements: This role requires regular presence in a manufacturing or fabrication environment. The incumbent must be able to access and safely navigate production areas which may include climbing, kneeling, stooping, and working in confined spaces. Must also be able to comply with all requirements including the use of required personal protective equipment (PPE) in accordance with company policy.

Required Education, Experience, & Skills

• Bachelor's Degree in Computer Science or related technical field and 4+ years relative experience or equivalent combination of education and experience.
• Proven experience supporting Windows-based environments and proficiency in Windows Domain Administration (User and Group Policies).
• Experience with virtual computing, data storage, backup systems, and update management.
• Ability to stand up a server from scratch.
• Ability to work independently with strong initiative and minimal supervision.
• Ability to support a 24/7 operation with after-hour on-call support.
• May consider candidates with less experience for a more junior role or additional experience for a more senior role.

Preferred Education, Experience, & Skills

• 8+ years of relative experience.
• Experience working on on-premise networks (onprem).
• Relevant certifications such as CompTIA (A+, Network+, Security+), MCSA, MCSE, Microsoft Server Hybrid Administrator (AZ-800, 801, 802), or VCP.
• Active Secret Clearance. #LI-Onsite #LI-JR1

Pay Information
Full-Time Salary Range: $79370 - $134929
Please note: This range is based on our market pay structures. However, individual salaries are determined by a variety of factors including, but not limited to: business considerations, local market conditions, and internal equity, as well as candidate qualifications, such as skills, education, and experience.
Employee Benefits: At BAE Systems, we support our employees in all aspects of their life, including their health and financial well-being. Regular employees scheduled to work 20+ hours per week are offered: health, dental, and vision insurance; health savings accounts; a 401(k) savings plan; disability coverage; and life and accident insurance. We also have an employee assistance program, a legal plan, and other perks including discounts on things like home, auto, and pet insurance. Our leave programs include paid time off, paid holidays, as well as other types of leave, including paid parental, military, bereavement, and any applicable federal and state sick leave. Employees may participate in the company recognition program to receive monetary or non-monetary recognition awards. Other incentives may be available based on position level and/or job specifics.
About BAE Systems Platforms & Services
BAE Systems, Inc. is a defense, aerospace, and security company headquartered in Falls Church, Virginia, with more than 40,000 employees worldwide. We serve, supply, and protect those who protect us. As one of the most geographically diverse international defense companies, we deliver a full range of products and services spanning air, land, maritime, space, and cyber, including advanced electronics, intelligence solutions, and dedicated customer support.
Our culture is performance-driven and values-led, built on curiosity, creativity, and collaboration. Purpose isn't a tagline here. It's what drives us. We're developing breakthrough technologies that defend national security and make a lasting impact on our communities and our planet. When you join BAE Systems, you're not just building a career. You're contributing to a mission that truly matters.
This position will be posted for at least 5 calendar days. The posting will remain active until the position is filled, or a qualified pool of candidates is identified.