✦ Luna Orbit — IT Support & Helpdesk

FLEX Senior Systems Engineer

at Marriott International

📍 Bethesda, MD, United States Hybrid Posted March 13, 2026
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Position Details

Type Full-Time
Experience senior
Exp. Years 8+ years
Education Not specified
Category IT Support & Helpdesk

About this role

This role involves performing systems programming tasks on IBM mainframes running z/OS, supporting hardware and software, and ensuring system performance and reliability.

Key Responsibilities

  • Perform z/OS systems programming
  • Support mainframe hardware and software
  • Configure and maintain storage systems
  • Perform system analysis and documentation
  • Support on-call rotation

Technical Overview

The technical environment includes IBM z/OS mainframes, z/OSMF for management, and related hardware and storage systems, with a focus on system customization, performance tuning, and support.

Ideal Candidate

The ideal candidate is a senior mainframe systems programmer with over 10 years of experience in z/OS environments, skilled in mainframe hardware, system customization, and storage management. They should be capable of supporting complex mainframe systems and performing performance tuning.

Must-Have Skills

10+ years performing general z/OS systems programming5+ years performing installationmaintenanceconfiguration and support of IBMBroadcomBMCand other ISV products3+ years mainframe hardware configuration3+ years z/OSMF customization

Nice-to-Have Skills

Coupling FacilitySYSPLEXStructuresPerformance tuningStorage managementAssembler programmingREXX programming

Tools & Platforms

IBM z/OSz/OSMFMainframe hardwareISV products

Required Skills

z/OSIBM z/OSz/OSMFMainframe hardwareNetwork configurationAssemblerREXXPerformance monitoringStorage managementDASDVirtual tape

Hard Skills

z/OSIBM z/OSz/OSMFMainframe hardwareNetwork configurationAssemblerREXXPerformance monitoringStorage managementDASDVirtual tape

Soft Skills

AnalysisDocumentationSupportSupport rotationSupport after-hours

Industry & Role

Industry Hospitality / Hotel Management
Job Function Mainframe systems programming and support

Keywords for Your Resume

z/OSIBM z/OSz/OSMFMainframe hardwareNetwork configurationAssemblerREXXPerformance monitoringStorage managementDASDVirtual tapeSupport rotationSupport after-hoursSystems programmingMainframe

Deal Breakers

Less than 8 years of relevant experience, Lack of mainframe or z/OS experience, Inability to support after-hours rotation

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