Onsite Mainframe z/OS Connect Admin - REST APIs & HA Expert

Ampcus Inc; Columbus (OH); On-site; USD 110,000 - 150,000; Full time

Job summary

Ampcus is actively seeking a veteran Mainframe and z/OS Connect Administrator to join our Columbus, OH operations on an onsite 6+ month contract. The role demands 15+ years of IT experience with IBM z/OS Connect EE, CICS Transaction Server, Liberty Server, and strong security controls.

You will expose CICS transactions as REST APIs, configure JSON integrations, manage RACF security, and drive CI/CD DevOps automation for reliable mainframe performance in multi-LPAR HA environments.

Qualifications

• 15+ years total IT experience in enterprise mainframe administration.
• 5+ years with IBM z/OS Connect EE.
• Expert in IBM z/OS, z/OS Connect EE, CICS Transaction Server.
• Proficient in exposing CICS transactions as REST APIs and managing REST/JSON.
• Security knowledge including RACF, TLS/SSL, OAuth2, JWT.

Responsibilities

• Administer IBM z/OS Connect EE and Liberty Server environments.
• Manage CICS Transaction Server, CICSPlex SM, and Sysplex environments.
• Design and maintain HA multi-instance and multi-LPAR mainframe architectures.
• Expose legacy CICS as REST APIs and handle JSON payloads.
• Enforce enterprise security policies (RACF, TLS/SSL, JWT, OAuth2).
• Troubleshoot production issues and support CI/CD automation for mainframe deployments.

Skills

Mainframe administration

z/OS Connect EE

CICS Transaction Server

REST APIs

DevOps CI/CD

Education

Advanced degrees in CS/IT

Tools

Liberty Server

CICSPlex SM

Sysplex

TLS/SSL

JWT/OAuth2

Job description

Ampcus is actively seeking a veteran Mainframe and z/OS Connect Administrator to join our Columbus, OH operations on an onsite 6+ month contract. The role demands 15+ years of IT experience with IBM z/OS Connect EE, CICS Transaction Server, Liberty Server, and strong security controls.

You will expose CICS transactions as REST APIs, configure JSON integrations, manage RACF security, and drive CI/CD DevOps automation for reliable mainframe performance in multi-LPAR HA environments.