Monitoring Engineer: Nagios XI Expert

Unisys; Philadelphia (Philadelphia County); On-site; USD 90,000 - 120,000; Full time

Job summary

Unisys is seeking a motivated Monitoring Engineer with 3+ years of experience, including 2+ years administering Nagios XI, to join our team in the United States. The role involves maintaining the Nagios XI platform in a mixed Windows/Linux environment and expanding monitoring coverage.

You will onboard devices, design custom checks, tune alerts, monitor performance, and document configurations. Collaboration with IT, network, systems, and application teams to identify gaps and implement

Qualifications

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent practical experience.
• 3 years plus of systems/network administration experience, including 2 years plus administering Nagios XI (or Nagios Core with strong XI familiarity) in a production environment.
• Solid scripting ability across platforms — Bash and/or Python for Linux checks, and PowerShell for Windows checks via NCPA.
• Working knowledge of SNMP, NRPE/NCPA, syslog, and common network/server monitoring protocols.
• Understanding of networking fundamentals (TCP/IP, ports, firewalls) as they relate to monitoring connectivity.
• Self-motivated and able to operate independently with minimal oversight.
• Strong communication skills, with the ability to translate technical monitoring data for other teams and leadership.

Responsibilities

• Maintain and administer the Nagios XI platform, including upgrades, patches, plugin updates, backups, and general platform health.
• Onboard new devices, servers, and services into monitoring as infrastructure grows, ensuring no gaps in coverage.
• Design, build, and maintain custom checks and monitoring scripts (NRPE, NCPA, SNMP, custom plugins) across Windows and Linux systems.
• Tune alerting and thresholds to reduce false positives while ensuring real issues are reliably detected.
• Monitor and optimize platform performance, including capacity, check latency, and database health.
• Document configurations, runbooks, and processes to keep monitoring logic transparent and maintainable.
• Partner with IT, network, systems, and application teams to identify monitoring gaps and translate business-critical services into checks.
• Proactively evaluate new plugins, integrations, and automation opportunities to continuously improve the platform.

Skills

Nagios XI administration

Bash scripting

Python scripting

PowerShell

SNMP monitoring

Networking fundamentals

Independent worker

Communication skills

Education

Bachelor's degree in Computer Science or related field

Tools

Nagios XI

NRPE

NCPA

SNMP

Job description

Unisys is seeking a motivated Monitoring Engineer with 3+ years of experience, including 2+ years administering Nagios XI, to join our team in the United States. The role involves maintaining the Nagios XI platform in a mixed Windows/Linux environment and expanding monitoring coverage.

You will onboard devices, design custom checks, tune alerts, monitor performance, and document configurations. Collaboration with IT, network, systems, and application teams to identify gaps and implement