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# z/OS Network Software Developer

- **Company:** Computer Task Group, Inc
- **Location:** Durham, NC, United States
- **Experience:** Experienced
- **Contract:** Temporary to permanent
- **Skills:** Protocol Stack, Computer Networks, Internet Control Message Protocol, Internet Protocol Security (IP SEC), IPv4, IPv6, Network Layer, Transport Layer, Network Protocols, Software Engineering, TCP/IP, Transmission Control Protocol (TCP), Z/OS, Transport Layer Security, Reliability of Systems, Information Technology
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/16_fa33bfab

## About the Role

* Strong understanding of TCP/IP and Layer 3/Layer 4 protocols, including IPv4, IPv6, ICMP, TLS, and IPSec.
 * Ability to interpret and apply IETF RFCs and other technical standards.
 * Strong software development and problem-solving skills.

Experience:

 * Minimum of 3 years of software development experience.
 * Experience developing TCP/IP networking code, preferably at the protocol stack level.
 * z/OS software development experience, particularly with PL/X, preferred.
 * Familiarity with traditional VTAM major/minor definitions preferred.
 * Experience auditing and remediating legacy clockwrap vulnerabilities, including the 2042 rollover, preferred.

Education:

 * Bachelor's degree in Computer Science, Information Technology, Software Engineering, or a related field preferred, or equivalent combination of education and experience.

Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required.

## Description

* Develop, enhance, and maintain network software for the z/OS mainframe environment.
 * Implement TCP/IP networking functionality and support integration of legacy infrastructure with modern routing technologies.
 * Analyze network protocols and technical standards to guide development.
 * Assess legacy networking components for clockwrap vulnerabilities, including the 2042 rollover issue, and develop remediation plans.
 * Troubleshoot networking software issues and support system reliability.