Linux Cyber Security Expert

Manifest Solutions is currently seeking a Linux Cyber Security Expert for an onsite position in Gahanna, OH or New Albany, OH.

• Linux Systems and Monitoring Engineer with experience in Red Hat Linux and Prometheus monitoring systems.
• Support, maintain, and optimize Linux-based environments while implementing effective monitoring, alerting, and performance analysis solutions.
• Administer and support Red Hat Enterprise Linux (RHEL) servers and related infrastructure.
• Install, configure, and maintain Prometheus for system and application monitoring.
• Develop and manage alerting rules, dashboards, and reporting for operational visibility.
• Monitor system performance, availability, and capacity trends.
• Troubleshoot Linux OS, services, networking, and monitoring issues.
• Collaborate with infrastructure, application, and security teams to support production environments.
• Perform patching, upgrades, and routine maintenance on Linux systems. Automate tasks using scripting tools such as Bash, Python, or similar.
• Document procedures, configurations, and operational support processes.
• Support incident response and root cause analysis for outages or performance events.
• Design and implement advanced security architectures for OT systems.
• Lead security incident response efforts and investigations.
• Develop and deliver training on OT security best practices.
• Maintain necessary documentation of security systems, projects, and/or processes to ensure unified understanding of system details.
• Plan and implement complex security projects/initiatives/incidents.
• Translate and present security topics competently to team members and leaders.
• Establish recommendations based on options presented.
• Present security information in a clear and concise manner.
• Collaborate on team learning needs and engage in opportunities to increase knowledge in security areas.
• Gather first‑hand information on security requirements to find the most cost‑effective improvements in security posture.
• Research and supply new opportunities to improve security posture; present new ideas and approaches.
• Manage time and resources efficiently to accommodate multiple assignments.
• Formulate effective work plans and share with other team members and groups to meet required security objectives.
• Communicate the role and expectations of Security in meeting Enterprise Security strategies and requirements.
• Specific tasks include vulnerability management, patch management, active directory administration, anti‑virus and endpoint security, firewall ACL management, encryption and certificate management, security logging and alerting, and access/password management.
• Complete all tasks with consideration for risk and impact to the SCADA/EMS system and the Bulk Electric System.

• Minimum of an Associate’s degree in an applicable area OR equivalent education and experience of a high school diploma/GED and two (2) years of relevant experience in an applicable area or certification in an applicable area.
• Applicable areas defined as: IT/OT System Administration, IT/OT Application Support, Cyber Security, ADMS/DMS/EMS/OMS/SCADA.
• Bachelor’s degree is strongly preferred.
• In addition to any experience included in education requirements above, must have four (4) years of relevant experience in a related role.
• CISSP or other Security certification preferred.
• Strong technical knowledge of OT protocols and security technologies.
• Over‑time, on‑call assignments, and occasional travel may be required.