Level 2 Systems Engineer; AS​/400

Level 2 Systems Engineer (AS/400) – Apex Systems

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$50.00/hr - $59.00/hr

Apex Systems is seeking a Level 2 Systems Engineer to join an infrastructure team at one of our clients, providing services and software solutions designed to bring stakeholders together and enhance operational efficiency. Our web-based software solutions focus on performance management through transparency, measurable outcomes, and seamless data integration. We believe in leveraging key performance indicators to drive continuous improvement.

The Infrastructure team supports multiple environments comprised of various applications and technologies. These applications enable business processes and associated procedures, forming a complex platform that captures, transmits, stores, hosts, retrieves, manipulates, and displays critical business information. The Infrastructure team plays a key role in ensuring consistent uptime for both Non‑Production and Production environments, which strongly influences application development and usage across business and technical teams.

Responsibilities include patching and upgrading infrastructure, maintaining and updating certificates, performing database changes, enhancing and maintaining systems, providing restorative services, and supporting daily operations.

• Certificate renewal and testing
• Internal service account maintenance
• Incident response
• Non-production support
• Database support
• Server / OS patching
• Middleware patching
• Cloud maintenance (AMIs & miscellaneous upgrades)
• Vulnerability scanning and remediation
• Monitoring and alerting
• Disaster recovery support
• System administration

• Install, configure, test, and maintain operating systems, application software, and system management tools
• Ensure the highest levels of systems and infrastructure availability
• Monitor and test application performance for potential bottlenecks, identify solutions, and implement fixes
• Maintain security, backup, and redundancy strategies
• Write and maintain custom scripts to improve efficiency and reduce manual intervention
• Participate in the design of information and operational support systems
• Security administration for SSO / SAML / SSL certificates, including coding for certificate/key deployments in production
• Support ongoing software and hardware upgrades/maintenance for middleware, OS, and related products (e.g., Web Logic, Tomcat, ESB, AIX)
• Support configuration changes and redesign, including instance creation, repurposing, and modifications
• Manage internal server account expirations, including coding changes as needed
• Collaborate with cross-functional IT teams (platform, networking, Linux, Unix, application performance)
• Address security vulnerabilities identified by third‑party tools (e.g., Nexpose, penetration testing)
• Create and maintain application performance monitoring processes (e.g., Dynatrace, Splunk)
• Perform server performance tuning and resolve production support and application stability issues

• Strong commitment to incorporating security into all decisions and daily responsibilities
• 5+ years of combined software and infrastructure engineering experience
• 5+ years of AS400 experience
• Experience with System i (iSeries)/Mimix
• Database skills (System i, Oracle, Maria)
• Database administration experience, including file changes, creations, and support
• Mule development and support (all development transactions use Mule for flow control)

• Bachelor’s degree in Computer Science, Information Systems, or related field
• Experience with Agile methodology and JIRA
• Hands‑on experience with Splunk
• Experience with Jenkins or other CI/CD tools
• Experience with AWS
• Experience with ESB technology

Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings…