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CrowdPlat · 18 hours ago

Senior Mainframe Security & Systems Administrator (z/OS) - W2 Candidates

United States

Contract

Remote

Senior Level, Lead/Staff

8+ years exp

CrowdPlat is seeking a Senior Mainframe Security & Systems Administrator to support a large enterprise legacy environment undergoing modernization and security transformation. This role involves acting as the primary security and platform SME, responsible for protecting enterprise data, maintaining compliance, and supporting mainframe transformation initiatives.

CrowdsourcingEnterprise SoftwareSoftware

Responsibilities

Act as the Mainframe Security SME for Top Secret Security (TSS), certificates, and access controls

Administer and support z/OS environments , including system components, user access, and security policies

Manage TLS, certificates, SSL keys, SFTP, FTPS, and encryption across the mainframe

Support audit, compliance, and risk-mitigation initiatives

Perform break/fix support, configuration, and security monitoring

Maintain user accounts, permissions, and role-based access controls

Support production control jobs and job scheduling systems

Provide technical support for terminal emulation, ISV tools, and operational utilities

Partner with network, application, and operations teams to support day-to-day enterprise mainframe workloads

Support modernization initiatives including mainframe data integration and CDC pipelines

Qualification

Z/OS systems administrationTLSCertificatesSSLJES2UNIX System Services (OMVS)Mainframe job scheduling systemsREXX scriptingMainframe performance monitoringInformatica PowerExchange