Mainframe Network Administrator

On-site
Posted Oct 1, 2026
1 position

Applications are currently unavailable for this posting.

Employment type: Full-time
Posting language: English
Application method: Apply on LinkedIn (LinkedIn sign-in required)

Job summary

Manage, support, and modernize mainframe networking infrastructure, including configuring session management tools and troubleshooting connectivity. Lead migrations end-to-end, coordinate cutover and rollback plans, validate session continuity and performance, maintain documentation, and provide L2/L3 support while ensuring security and compliance.

Job details

Key Skills Mainframe network administration Session managers CA TPX, CL/SuperSession VTAM,SNA and TCP/IP on z/OS Session manager migration experience ROLE PROFILE Job Description/ Responsibilities Position Description The Mainframe Network administrator will manage, support, and modernize the mainframe networking environment. The applicant will design, configure, and support mainframe network infrastructure including VTAM, NCP, SNA, and TCP/IP, and will troubleshoot session-level connectivity and session management functions using CA TPX, CL/SuperSession and related tools. Excellent communication skills are required; previous session management migration experience is a plus. The candidate will lead and execute the migration of session management and networking tools to updated or consolidated platforms, ensuring session continuity and minimal business disruption. Duties include configuring CA-TPX, CL/SuperSession for session routing, security, and user access; planning, testing, and implementing cutover and rollback strategies; coordinating timelines, dependencies, and risk mitigation with vendor teams and internal stakeholders; monitoring session performance pre/post-migration; and maintaining configuration and procedure documentation. The role also ensures security, audit, and regulatory compliance and provides L2/L3 support on an on-call rotation. Required Skills 8+ years hands-on mainframe networking Strong expertise in SNA and TCP/IP protocols CA TPX, CL/SuperSession configuration, administration, session routing and troubleshooting Session management tool and network software migration Session continuity and cutover/rollback planning VTAM, NCP, Communications Server for z/OS Troubleshooting, documentation and stakeholder communication Able to lead migrations end-to-end, including validation Desired Skills z/OS and related mainframe operating environments High expertise in handling tools like CA TPX and CL/Supersession Migrating to CL/SuperSession from other platforms Network security protocols and compliance frameworks Additional Or Advantageous Skills BFSI, healthcare or large enterprise mainframe estates Vendor tool transition and vendor coordination L2/L3 support and on-call rotation 8+ years hands-on mainframe networking Strong expertise in SNA and TCP/IP protocols CA TPX, CL/SuperSession configuration, administration, session routing and troubleshooting VTAM, NCP, Communications Server for z/OS Able to lead migrations end-to-end, including validation z/OS and related mainframe operating environments High expertise in handling tools like CA TPX and CL/Supersession Migrating to CL/SuperSession from other platforms

What you’ll do

Requirements

Requires 8+ years of hands-on mainframe networking experience and strong expertise in SNA, TCP/IP, VTAM, NCP, and CA TPX or CL/SuperSession administration and troubleshooting. Candidates should be able to lead session management and network software migrations, plan and validate cutovers, and communicate effectively with stakeholders.