> Markdown version of [/jobs/ext/531217-senior-z-os-systems-programmer-communication-server](https://www.wearedevelopers.com/jobs/ext/531217-senior-z-os-systems-programmer-communication-server). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior z/OS Systems Programmer (Communication Server) - **Company:** CDA, LLC - **Location:** United States (Remote available) - **Experience:** Expert - **Salary:** $135,000.0 - $165,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Apache HTTP Server, Unix, Communications Protocols, Disaster Recovery, Distributed Systems, Middleware, File Transfer Protocol (FTP) SSL Extension, IBM Parallel Sysplex, Monitoring of Systems, Job Control Language (JCL), Rexx (Programming Language), IBM Websphere Application Server, Network Architecture, TCP/IP, Z/OS, Transport Layer Security, File Transfer Protocol (FTP), Computer Network Technologies, System Availability, Social Network Analysis, Hardware Infrastructure, Network Optimization - **Published:** June 10, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=71ca88e799a23441 ## About the Role Do you have a valid CCP Data Engineer certification?, Do you have experience in Vendor communication?, Technical Skills * Minimum of 4 years of experience as a z/OS Systems Programmer with a focus on Communication Server technologies. * Strong expertise in: * z/OS Communication Server * VTAM * TCP/IP on z/OS * SNA * Parallel Sysplex * Sysplex Distributor * z/OS Cryptographic Services * Hands-on experience with: * AT-TLS * Policy Agent * SSL/TLS * SFTP * FTPS * Connect:Direct (NDM) * Apache HTTP Server on z/OS * Strong scripting and automation experience using JCL, REXX, and Java. * Experience with z/OS Unix System Services (USS) and integration with distributed systems. * Solid understanding of z/OS architecture and supporting hardware components. * Proven ability to troubleshoot complex networking and communication issues in a mainframe environment. Professional Skills * Strong leadership, organizational, and time management skills. * Excellent analytical and problem-solving abilities. * Strong communication and collaboration skills with the ability to work effectively across technical teams. * Ability to build and maintain productive relationships with internal stakeholders and external vendors. * Self-motivated and capable of working independently with minimal supervision. * Ability to manage multiple priorities and adapt to changing business requirements. * Demonstrated flexibility and willingness to learn new technologies and methodologies. ## Description As a Senior z/OS Systems Programmer specializing in Communication Server, you will be responsible for maintaining and optimizing mainframe network infrastructure. You will play a crucial role in ensuring the reliability, security, and efficiency of the z/OS communication environment, including VTAM, TCP/IP, SNA, Sysplex, and related technologies., * Manage and administer z/OS Communication Server components, including VTAM, TCP/IP, SNA, Parallel Sysplex, Sysplex Distributor, and z/OS Cryptographic Services. * Configure and maintain communication protocols such as VTAM, TCP/IP, and SNA to optimize network performance and reliability. * Implement and support secure communication technologies, including AT-TLS (z/OS Policy Agent), SSL/TLS, SFTP, FTPS, and Connect:Direct. * Manage and troubleshoot Apache HTTP Server environments on z/OS and develop or customize Apache modules as required. * Collaborate with application teams to integrate z/OS Communication Server technologies with WebSphere and other middleware platforms. * Develop and maintain automation and customization solutions using JCL, REXX, and Java. * Utilize z/OS Unix System Services (USS) to integrate mainframe applications with distributed environments. * Monitor system performance and implement tuning strategies to optimize network throughput and response times. * Provide technical expertise in mainframe networking technologies and support capacity planning, high availability, and disaster recovery initiatives. * Stay current with emerging technologies and industry best practices related to z/OS communications and networking. ## Related Videos - [You’re a great coder? 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