Operations Technology Senior Administrator

Location:

Fort Mill, SC, US, 29715

Department: IT Infrastructure (IT06)

Domtar is a leading producer of pulp, paper, packaging, tissue and wood products. Through our focus on safety and sustainability, as well as our commitment to operational excellence and our network of facilities across Canada and the United States, Domtar delivers high-quality and cost-effective products to customers around the world.

Our workforce is comprised of 14,000 talented and hardworking individuals. We are proud to offer competitive compensation, a supportive working environment, rewarding career paths and plenty of opportunities for learning and growth.

The location in Fort Mill, (South Carolina, United States), is seeking talent to fill the position of Operations Technology Senior Administrator
. This job is full-time permanent.

The Senior Administrator, Operational Technology (OT), is responsible for the administration, support, maintenance, and continuous improvement of Operational Technology infrastructure supporting Domtar manufacturing facilities. This role provides advanced technical expertise for Process Control Network (PCN) environments, including industrial networks, servers, virtualization platforms, cybersecurity technologies, backup and recovery systems, and remote access solutions.

Working closely with mill operations, engineering, vendors, and corporate IT teams, the Senior OT Administrator helps ensure OT systems remain secure, reliable, and available to support safe and efficient manufacturing operations. The position provides technical expertise and support for infrastructure modernization, cybersecurity initiatives, and operational support activities across multiple facilities.

• Administer and support OT servers, workstations, virtualization platforms, storage systems, and backup solutions.
• Maintain Active Directory services, user accounts, security groups, and access controls within OT environments.
• Monitor system performance, health, capacity, and availability to ensure reliable operation of critical manufacturing systems.
• Coordinate infrastructure upgrades, lifecycle replacements, and technology refresh initiatives.
• Develop and maintain technical documentation, standards, and support procedures.
• Support disaster recovery and business continuity processes for OT infrastructure.

• Implement and maintain cybersecurity controls and standards within OT environments.
• Support vulnerability management, patch deployment, endpoint protection, and security monitoring activities.
• Participate in security assessments, audits, and remediation efforts.
• Ensure compliance with corporate cybersecurity standards and industry best practices.
• Assist with cybersecurity incident response, investigation, and recovery activities.
• Promote security awareness and adherence to OT cybersecurity policies.
• Support and troubleshoot industrial Ethernet networks, switches, firewalls, wireless technologies, and secure remote access solutions.
• Diagnose and resolve infrastructure and network issues that impact manufacturing operations.
• Maintain network diagrams, asset inventories, and system documentation.
• Coordinate vendor support activities and third-party access requirements.
• Assist with implementation and support of OT monitoring and management tools.

• Participate in OT infrastructure modernization, reliability improvement, and digital transformation initiatives.
• Lead technical implementation activities for OT infrastructure projects.
• Support the deployment and commissioning of new OT technologies and systems.
• Coordinate infrastructure-related project activities with mill personnel, vendors,…