Seeking a Senior Mainframe Engineer with strong expertise in IBM z/OS environments. This role focuses on system programming, infrastructure support, performance tuning, and enterprise mainframe operations. The ideal candidate will have hands-on experience across system configuration, storage, security, and network components within a large-scale environment.

Job Title : Senior Mainframe Engineer z/OS

Location : Remote / Bethesda, MD (Travel to location thrice in a quarter)

No sponsorship will be provided

Key Responsibilities:

Perform installation, configuration, maintenance, and support of z/OS systems and associated ISV products

Manage and support mainframe system environments, ensuring stability, performance, and availability

Configure and maintain z/OSMF and related system components

Support mainframe network configuration (TCP/IP, VTAM, etc.)

Monitor system performance and implement tuning improvements

Analyze system issues, identify root causes, and implement corrective actions

Develop and maintain technical documentation for system processes and configurations

Participate in on-call rotation and provide after-hours support as needed

Required Qualifications

7+ years of z/OS systems programming experience

5+ years supporting IBM and ISV products (Broadcom, BMC, Precisely, or similar)

3+ years of mainframe network configuration and management

3+ years of experience with z/OSMF customization and administration

Strong experience with REXX and/or Assembler programming

Preferred Qualifications

Experience with SYSPLEX, Coupling Facility, and related structures

Knowledge of CA-7 or similar batch scheduling tools

Experience with mainframe emulators such as Blue Zone

Storage management experience including SMS, ACS routines, DFHSM, and CA-1

Experience with enterprise storage solutions (e.g., virtual tape, DASD)

Familiarity with ACF2 security (administration, configuration, compliance)

Experience in disaster recovery planning and implementation

Additional Information

Candidates must be willing to participate in an on-call support rotation

Strong analytical and problem-solving skills required

Ability to work in a collaborative, enterprise-level environment

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Senior Mainframe Engineer z/OS