The Mainframe Network Engineer is responsible for the design, configuration, implementation, and support of network connectivity for IBM mainframe environments. This role ensures reliable, secure, and high-performing communication between mainframe systems, distributed platforms, external partners, and enterprise applications. The engineer will work on key technologies such as TCP/IP, VTAM, SNA, Enterprise Extender, TN3270, FTP, and network security controls, supporting critical production workloads in large enterprise environments.
* This role requires employees to live in or around the Phoenix, AZ area. You will be responsible to be onsite 3 days a week. We will consider candidates who are willing to relocate to the area.
Responsibilities:
Mainframe Network Administration:
· Install, configure, and maintain z/OS Communications Server components.
· Support and manage TCP/IP configuration on z/OS systems.
· Maintain and troubleshoot VTAM definitions and network resources.
· Configure and support Enterprise Extender (EE) and SNA connectivity where applicable.
· Maintain TN3270 access and session-related connectivity for end users and applications.
Network Connectivity & Support:
· Ensure stable communication between mainframe systems and:
o Distributed servers
o External vendors/partners
o Internal enterprise applications
o Middleware platforms
· Diagnose and resolve connectivity issues involving:
o IP routing
o Port communication
o Session failures
o DNS resolution
o Firewall-related blocks
· Support file transfer protocols such as FTP, SFTP, and other secure data exchange solutions.
Security & Compliance:
· Work closely with network security teams to enforce secure communication protocols.
· Ensure compliance with enterprise security controls and audit requirements.
· Support SSL/TLS certificate implementation and secure transmission standards.
· Assist with firewall rule validation, port usage reviews, and vulnerability remediation.
Disaster Recovery & Resiliency:
· Support network design and recovery procedures for Disaster Recovery (DR) environments.
· Validate communication paths for failover systems and backup data centers.
· Participate in DR tests and business continuity exercises.
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