Mainframe Network Engineer

Mainframe Network Engineer Duration: 6-12 months contract to hire Work Location: Phoenix, AZ, Plano, TX, Charlotte, NC, Richmond, VA, Jacksonville, FL, Pennington, NJ and Chicago, IL (Hybrid – 3days onsite, 2days WFH) Overview: 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. 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: Distributed servers External vendors/partners Internal enterprise applications Middleware platforms Diagnose and resolve connectivity issues involving: IP routing Port communication Session failures DNS resolution 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. Compu-Vision Consulting