Mainframe Network Admin-W2-Remote

Tektree Systems Inc.; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

Tektree Systems Inc. seeks a seasoned Mainframe Network Administrator to manage, support, and modernize the mainframe networking environment.

The role covers VTAM, NCP, SNA, and TCP/IP, with migration and session management responsibilities across CA TPX and CL/SuperSession. Responsibilities include designing, configuring, and supporting mainframe network infrastructure, planning cutover/rollback strategies, coordinating with vendors and stakeholders, and providing on-call L2/L3 support while

Qualifications

• 8 years hands-on mainframe networking.
• Strong expertise in SNA and TCP/IP protocols.
• CA TPX, CL/SuperSession configuration, administration, session routing and troubleshooting.

Responsibilities

• Lead the migration of session management and networking tools to updated platforms with minimal business disruption.
• Configure CA-TPX and CL/SuperSession for session routing, security and user access.
• Plan, test, and implement cutover and rollback strategies with vendor teams and internal stakeholders.
• Monitor session performance pre/post-migration and maintain configuration documentation.
• Provide L2/L3 support on an on-call rotation and ensure security and regulatory compliance.

Skills

Mainframe networking

SNA

TCP/IP

CA TPX

CL/SuperSession

Session routing

Migration planning

VTAM

NCP

Tools

CA TPX

CL/SuperSession

Job description

Mainframe Network administrator

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

Years of Experience: 18.00 Years of Experience