Mainframe Network Engineer

Title: Mainframe Network Engineer
Location: Phoenix, AZ (Hybrid - 3 days from office and rest from home)
Duration: 12+ months Contract

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.