Linux Cyber Security Expert

Manifest Solutions; New Albany (OH); On-site; USD 90,000 - 140,000; Full time

Job summary

Manifest Solutions is seeking a Linux Cyber Security Expert for an onsite role in Gahanna, OH or New Albany, OH. You will design and sustain secure Linux environments, specialize in OT security, and collaborate with IT, OT and security teams to protect critical assets.

Responsibilities include implementing monitoring with Prometheus, performing patching, incident response, and delivering training on OT security practices while maintaining comprehensive documentation.

Qualifications

• Strong Linux administration experience in enterprise environments.
• OT/ICS security concepts and incident response familiarity.
• Experience with monitoring and security tooling in Linux environments.

Responsibilities

• Design, implement, and maintain secure Linux environments.
• Collaborate with IT/OT and security teams on projects.
• Develop and manage alerting, dashboards, and reports.
• Lead security incident response and investigations.
• Perform patch management and routine maintenance on Linux systems.

Skills

Linux

Red Hat

Prometheus

Bash scripting

Python

OT security

Incident response

Education

Associate degree or higher

CISSP certification

Bachelor's degree preferred

Job description

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

Responsibilities

• 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.

Education

• 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.