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# Mainframe Network / System Engineer III (z/OS TCP/IP & VTAM) - NC/AZ/TX/NJ

- **Company:** Experis
- **Location:** Chandler, AZ, United States
- **Experience:** Expert
- **Contract:** Temporary to permanent
- **Skills:** Domain Name System (DNS), File Transfer Protocol (FTP) SSL Extension, IBM Parallel Sysplex, Monitoring of Systems, Tivoli Management Framework, Internet Protocol Security (IP SEC), Mainframes, Routing, TCP/IP, Z/OS, File Transfer Protocol (FTP)
- **Published:** August 9, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=5e639514ac0c4dbb

## About the Role

Our client, a leading financial services organization, is seeking a Mainframe Network / System Engineer III (z/OS TCP/IP & VTAM) to join their team. As a Mainframe Network / System Engineer III (z/OS TCP/IP & VTAM), you will be part of the Infrastructure Support team supporting critical banking operations. The ideal candidate will demonstrate strong problem-solving skills, adaptability, and a proactive approach to technology challenges, which will align successfully in the organization., * 10+ years of experience in z/OS Communications Server (VTAM, TCP/IP)

 * Deep expertise in TCP/IP, SNA, VTAM, enterprise routing, and DNS
 * Hands-on experience with Policy Agent (AT-TLS, IPSec) and secure file transfer protocols (Connect: Direct, SFTP, FTPS)
 * Proficiency with NetView or equivalent monitoring tools
 * Strong troubleshooting skills in high-volume, production environments supporting Parallel Sysplex architectures (DVIPA/Sysplex Distributor)

## Description

* Configure and maintain z/OS Communications Server (VTAM, TCP/IP) supporting mission-critical banking workloads
 * Engineer TCP/IP stacks, OSA interfaces, routing, VIPA/DVIPA, and Sysplex Distributor
 * Support SNA/APPN/Enterprise Extender (EE) for legacy and hybrid banking applications
 * Design and support TN3270 connectivity for internal/external users and vendor integrations
 * Implement and manage security, compliance, and data protection protocols including AT-TLS, IPSec, and Policy Agent (PAGENT)


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