{"schemaVersion":"jobsearcher.job.v1","id":"16423da1f2d3532da43e2ee2","url":"https://jobsearcher.com/jobs/16423da1f2d3532da43e2ee2","canonicalUrl":"https://jobsearcher.com/jobs/16423da1f2d3532da43e2ee2","title":"Mainframe Network Engineer Administration","description":"Job Title: Mainframe Network Engineer (Hybrid Role)Location – Phoenix, AZ (3 days onsite and 2 days WFH )Duration – 6-12+ months with extensionThe 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:o Distributed serverso External vendors/partnerso Internal enterprise applicationso Middleware platforms• Diagnose and resolve connectivity issues involving:o IP routingo Port communicationo Session failureso DNS resolutiono 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.","company":"Tech Observer","rawCompany":"tech observer","city":"Phoenix","state":"AZ","isRemote":false,"isActive":false,"createdAt":"2026-07-01T10:38:07.636Z","occupations":[{"code":"15-1244.00","title":"Network and Computer Systems Administrators","slug":"network-and-computer-systems-administrators"},{"code":"15-1231.00","title":"Computer Network Support Specialists","slug":"computer-network-support-specialists"},{"code":"15-1241.00","title":"Computer Network Architects","slug":"computer-network-architects"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541513","title":"Computer Facilities Management Services","slug":"computer-facilities-management-services"},{"code":"541519","title":"Other Computer Related Services","slug":"other-computer-related-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Mainframe Network Engineer Administration","description":"Job Title: Mainframe Network Engineer (Hybrid Role)Location – Phoenix, AZ (3 days onsite and 2 days WFH )Duration – 6-12+ months with extensionThe 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:o Distributed serverso External vendors/partnerso Internal enterprise applicationso Middleware platforms• Diagnose and resolve connectivity issues involving:o IP routingo Port communicationo Session failureso DNS resolutiono 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.","datePosted":"2026-07-01T10:38:07.636Z","dateModified":"2026-07-01T10:38:07.636Z","hiringOrganization":{"@type":"Organization","name":"Tech Observer","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Phoenix","addressRegion":"AZ","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"16423da1f2d3532da43e2ee2"},"url":"https://jobsearcher.com/jobs/16423da1f2d3532da43e2ee2"}}