DMI is a leading provider of digital services and technology solutions, headquartered in Tysons Corner, VA. With a focus on end-to-end managed IT services, including managed mobility, cloud, cybersecurity, network operations, and application development, DMI supports public sector agencies and commercial enterprises around the globe. Recognized as a Top Workplace, DMI is committed to delivering secure, efficient, and cost-effective solutions that drive measurable results. Learn more at www.dminc.com

DMI, LLC is seeking a z/OS Mainframe Systems Programmer to join us. The z/OS Mainframe Systems Programmer will provide full lifecycle support for mainframe infrastructure, including planning, installation, configuration, maintenance, troubleshooting, and performance tuning. This individual will be responsible for ensuring high availability, security, and disaster recovery readiness across a multi-LPAR Parallel Sysplex environment.

Duties and Responsibilities:

• Provide day-to-day systems programming support for z/OS (2.5 and 3.1) and all related IBM and third-party products.
• Install, configure, and upgrade IBM z/OS components, including JES2, TCP/IP, VTAM, RACF, SMP/E, and IBM z/Workload Scheduler version 10.2.
• Support IBM enterprise servers across multiple generations of processors to include (z13 through z17), including Parallel Sysplex and Coupling Facility operations.
• Administer and optimize storage management (DFSMS, DFHSM, VSAM, DFSORT) and hardware configuration definitions (HCD, IODF/IOCDS).
• Provide systems support for middleware, including CICS, USS (OMVS, zFS, NFS, Apache), Debug Tools, and networking components.
• Provide information used to administer RACF security environments and integrate with Vanguard Security Solutions for enhanced compliance and auditing.
• Support third-party vendor software, including TCP/IP Monitor, VPS (LRS).
• Execute and document Disaster Recovery (DR) exercises; maintain DR readiness and audit compliance.
• Perform system performance monitoring and tuning using SMF, RMF, and other performance data analysis tools.
• Support all technical staff and engineers and provide knowledge transfer through structured documentation in Microsoft OneNote.
• Prepare and execute IPLs, HMC profile changes, and system parameter updates. 

Education and Years of Experience: Bachelor's Degree or equivalent experience.

• Recent (within the last 6 months) hands-on experience with z/OS 2.5 and/or z/OS 3.1.
• 10+ years of experience as a z/OS Systems Programmer in large enterprise environments.

 Required Skills/Certifications: 

• Strong expertise with Sysplex, Coupling Facility, JES2, SMP/E, TCP/IP, VTAM, RACF, CICS, USS, and IBM Workload Scheduler.
• Proven ability in performance tuning, SMF, RMF data analysis, and troubleshooting complex system issues.
• Experience working with IBM mainframe hardware from z13 to z17.
• Proficiency in COBOL (v6.2, v5.2, v4.2), Assembler, and REXX for utilities and automation.
• Strong PC/server background with ability to use modern tools for documentation, collaboration, and process management.

Desired Skills/Certifications: 

• Experience with IBM z Workload Scheduler version 10, Vanguard Security Solutions.
• Familiarity with hybrid environments integrating the mainframe with distributed platforms.
• Knowledge of modern DevOps practices in mainframe operations.

Clearance Requirements: Successful completion of a Public Trust background investigation and/or a Public Trust clearance.

Min Citizenship Status Required: Must be a U.S. Citizen

Physical Requirements: No physical requirements are needed for this position.

Location: Remote, US

#LI-SM3

DMI is a diverse, prosperous, and rewarding place to work. Our culture is shaped by five core values that guide how we work, grow, and succeed together:

• Do What’s Right – We lead with honesty and integrity.
• Own the Outcome – We take responsibility and deliver.
• Deliver for Our Customers – We are relentless about delivering value.
• Think Bold, Act Smart – We innovate with purpose.
• Win Together – We collaborate and celebrate our success.

These values aren’t just ideals—they show up in how we support every part of your well-being:

• Convenience/Concierge – Virtual health visits, commuter perks, pet insurance, and entertainment discounts that make life easier.
• Development – Annual performance reviews, tuition assistance, and internal career growth opportunities to help you thrive.
• Financial – Generous 401(k) matches, life and disability insurance, and financial wellness tools to support your future.
• Recognition – Annual awards, service anniversaries, referral bonuses, and peer-to-peer shoutouts that spotlight your achievements.
• Wellness – Healthcare coverage, wellness programs, flu shots, and biometric screenings to support your health.

DMI values employees for their talents and contributions, and we take pride in helping our customers achieve their goals. Because when we live our values, we all win together.

***************** No Agencies Please *****************

Applicants selected may be subject to a government security investigation and must meet eligibility requirements for access to classified information. US citizenship may be required for some positions.