E- Work from
- United States
- Contract
- Full-time
- Posted
- 8 November 2026
- Apply by
- 7 January 2027
In this role you will be joining a team of technical professionals supporting a large-scale z/OS systems platform. This position requires an experienced systems programmer with at least 8 years of experience supporting the z/OS Mainframe Network environment.
Worker Type
EmployeeThe Mainframe Systems Programmer provides support for on-going projects that require the installation, testing, and implementation of new operating systems and other 'system' software. Also, the Maintenance and debugging of systems software. Coordination and the IOGEN work for new MF hardware. Research and evaluation of new software and hardware products, assisting team members and other areas with technical questions and problem resolution. Monitoring and tuning of systems software. Functional knowledge, use of z/OS components and detailed knowledge of support products such as tape management, scheduling, security, monitoring systems, etc.
Responsibilities include configuring and maintaining the integrity and data/IP security of the Mainframe's host communication subsystems and associated program products.
Responsibilities
As a Mainframe Network Specialist, you'll need to know how to
Perform TCPIP Port Reserves (Additions, Deletions, Changes) Perform VTAM updates (Additions, Deletions, Changes)
Manage OSA Adapters in a complex Mainframe environment
Perform VTAM PU/LU updates (Additions, Deletions, Changes) including Enterprise Extenders (EE)
Understand the configuration/installation of network products (Connect Direct, ASG OUTBOUND) and support FTP, SFTP and FTP/TLS
Implement AT-TLS rules (digital certificate management). Configure and manage IPSEC policies (permit/deny rules, VPN- ipsec tunnels)
Trace, Debug and Error Analysis
Support Client Disaster Recovery Exercises
Problem and Change Management Service Request Management
Communicate regularly with technical, applications and operational staff to ensure Network connectivity and security.
Act as a Mainframe Networking resource for internal and external department projects.
Mandatory skills
Must have extensive experience of Mainframe Network (VTAM) systems programming. This is essential to the role.
Must have knowledge of all the following z/OS, SMP/E, TSO/ISPF, USS, SDSF, JCL.
Session Management products e.g. TPX, Teleview, CL/Supersession
Network Management products e.g. NETVIEW, Netmaster/TCPIP
Must be able to work independently.
Must have excellent problem determination skills and be a true team player.
You will be required to provide off hours support for the implementation of software changes and support for other projects requiring software expertise as well as be part of an on-call rotation.
Set and achieved challenging short, medium and long term goals which exceeded the standards in their field
Excellent written and spoken communication skills; an ability to communicate with impact, ensuring complex information is articulated in a meaningful way to wide and varied audiences
Built effective networks across business areas, developing relationships based on mutual trust and encouraging others to do the same
Have some experience of creating and deploying comprehensive business/operating plans which consistently deliver desired results
Primary Location City/State
Homebased - Downers Grove, IL - Finley, Illinois
Additional Locations (if applicable)
Ensono is an Equal Employment Opportunity Employer. Ensono provides equal employment opportunities to all qualified applicants without regard to race, color, religion, national origin, ancestry, citizenship status, sex, marital status, pregnancy, age, disability, genetic information, sexual orientation, gender identity or expression, veteran status, military status, or any other status protected by applicable law.
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