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# Mainframe Systems Engineer (z/OS & Networking)

- **Company:** Conexess Group
- **Location:** Birmingham, AL, United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Unix, Customer Information Control System (CICS), Computer Programming, System Configuration, IBM DB2, Disaster Recovery, Domain Name System (DNS), File Transfer, File Transfer Protocol (FTP) SSL Extension, Job Control Language (JCL), Subnetting, Traceroute, Interactive System Productivity Facility (ISPF), Mainframes, Network Configuration and Change Management, Routing, Open Shortest Path First (OSPF), Performance Tuning, Ping (Networking Utility), TCP/IP, Z/OS, File Transfer Protocol (FTP), Load Balancing, Computer Network Technologies, Information Technology
- **Published:** October 19, 2026
- **Apply:** https://www.careerbuilder.com/job-details/mainframe-systems-engineer-z-os-networking-birmingham-al--463cdf36-fc8f-4f06-bf8b-345080be0eb6

## About the Role

* Bachelor's degree in Computer Science, Business, or a related field and six (6) years of mainframe infrastructure technical software and hardware analysis, programming, and installation experience
 * Or High School Diploma or GED with ten (10) years of experience of mainframe infrastructure technical software and hardware analysis, programming, and installation
 * Experience in installation and support of Mainframe system products including ZOS, CICS, MQ, DB2, Storage, Automation, ZLINUX or Networking
 * Experience in problem determination, installation and support of mainframe products, disaster recovery experience and knowledge, and performance and tuning experience
 * Experience in opening, managing, solving, and closing problems with vendor support centers

Skills and Competencies

 * Ability to interpret and ensure compliance with applicable rules, regulations, and industry guidance
 * Ability to work in a team environment when applicable
 * Ability to work under limited guidance
 * Ability to work under pressure and meet deadlines
 * Excellent problem solving and trouble shooting skills
 * Strong communication and collaboration abilities
 * Strong understanding of mainframe hardware

## Description

Mainframe Systems Engineer (z/OS & Networking)Location - 100% Remote - ability for hybrid in specific locationsTerms - Direct Hire / PermanentJob Description: The Mainframe Systems Engineer installs and maintains mainframe operating systems ensuring the stability, performance and security of our mainframe environment while driving innovation and continuous improvement.Primary ResponsibilitiesEvaluates system specifications, input/output processes, and working parameters for hardware/software compatibilityTroubleshoots and resolves complex technical issues related to mainframe systems and applicationsAdministers, configures, and maintains mainframe systems, including hardware, operating systems, and software componentsMaintains operational effectiveness and efficiency by monitoring, evaluating, and adjusting mainframe operating systemsMaintains quality service by establishing and enforcing organization standardsMaintains installation records by documenting system configurations, procedures, and best practicesResolves problems by determining cause, providing technical assistance to applications and other support staffDevelops and implements backup and disaster recovery strategies to ensure business continuityCovers on call 24x7 on a rotating basis for problem resolution and SEV1 incidentsEnsures compliance with risk management programs, rules and regulations, and cybersecurity practices; identifies opportunities for and supports process improvements; applies disciplined change management practicesRequirementsBachelor's degree in Computer Science, Business, or a related field and six (6) years of mainframe infrastructure technical software and hardware analysis, programming, and installation experienceOr High School Diploma or GED with ten (10) years of experience of mainframe infrastructure technical software and hardware analysis, programming, and installationExperience in installation and support of Mainframe system products including ZOS, CICS, MQ, DB2, Storage, Automation, ZLINUX or NetworkingExperience in problem determination, installation and support of mainframe products, disaster recovery experience and knowledge, and performance and tuning experienceExperience in opening, managing, solving, and closing problems with vendor support centersSkills and CompetenciesAbility to interpret and ensure compliance with applicable rules, regulations, and industry guidanceAbility to work in a team environment when applicableAbility to work under limited guidanceAbility to work under pressure and meet deadlinesExcellent problem solving and trouble shooting skillsStrong communication and collaboration abilitiesStrong understanding of mainframe hardwareBasic Networking Knowledge TCPIP IP V4 addressing, subnetting, utilities like traceroute, ping, etc.Routing protocols (OSPF and static routes in our case)Content delivery, load balancersDNS basic knowledge: forward/reverse lookup, resolvers, DNS caching/time to liveFTP/FTPS/SFTP/SSHVTAM Basic configuration: Major nodes, application definitions, Enterprise ExtenderBasic Unix knowledge File structureBasic commands: ls, cd, chmod, etc.Basic z/OS knowledge TSO, ISPF,JCL, job submission, etc.Security TLS sessionsCertificate chains, keyringsNice to have: z/OS policy agent (PAGENT)ZOSMF network configuration assistantManaged file transfer applications such as Connect DirectMainframe print delivery (Infoprint)Hypersockets and Shared Memory communicationService Now experience