Mainframe Network Engineer || Phoenix Arizona 85027 (Hybrid – 3 days/week onsite)
About The Position
The Mainframe Network Engineer designs, configures, implements, and supports network connectivity for IBM mainframe environments. The role ensures reliable, secure, and high-performing communication among mainframe systems, distributed platforms, external partners, and enterprise applications. It supports critical production workloads in large enterprise environments using technologies such as TCP/IP, VTAM, SNA, Enterprise Extender, TN3270, FTP, and network security controls. The engineer administers z/OS Communications Server components and supports network connectivity, security, disaster recovery, and resiliency. The position is a 12-month contract with possible extension, located in Phoenix, Arizona, with a hybrid schedule requiring three days onsite per week. Relocation is available.
Requirements
- Experience with mainframe network technologies, particularly VTAM and TCP/IP.
- Experience with IBM mainframe environments and z/OS Communications Server.
- Knowledge of SNA, Enterprise Extender, TN3270, FTP, and network security controls.
- Ability to troubleshoot network connectivity issues, including IP routing, ports, sessions, DNS, and firewall blocks.
Responsibilities
- 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 and SNA connectivity where applicable.
- Maintain TN3270 access and session-related connectivity for end users and applications.
- Ensure stable communication between mainframe systems and distributed servers, external vendors and partners, internal enterprise applications, and middleware platforms.
- Diagnose and resolve connectivity issues involving IP routing, port communication, session failures, DNS resolution, and firewall-related blocks.
- Support FTP, SFTP, and other secure data exchange solutions.
- Work 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.
- Support network design and recovery procedures for disaster recovery environments.
- Validate communication paths for failover systems and backup data centers.
- Participate in disaster recovery tests and business continuity exercises.
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What This Job Offers
Education Level
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