Mainframe Applications Developer

Our client is seeking a Senior Mainframe Applications Developer to join a highly experienced team supporting mission-critical systems.

This position is a unique opportunity to work directly with a senior subject matter expert prior to retirement and participate in a structured knowledge transfer process. The selected candidate will assume ownership of a critical suite of applications while helping support ongoing modernization initiatives and mainframe-to-modern-platform migrations.

What You’ll Be Doing

• Support, maintain, troubleshoot, and enhance enterprise mainframe applications.
• Analyze and modify existing COBOL applications and legacy codebases.
• Debug complex production and application issues.
• Participate in application modernization and migration initiatives.
• Assist with API integrations and cross-platform data exchanges.
• Collaborate with development teams working in other technologies and platforms.
• Perform impact analysis and identify dependencies across interconnected systems.
• Participate in knowledge transfer activities with senior application SMEs.
• Support SOX-regulated order-to-cash business applications.

• 7+ years of IBM z/OS Mainframe Development experience.
• Advanced experience with:
• COBOL
• JCL
• CICS
• DB2
• VSAM
• Strong troubleshooting and root-cause analysis skills.
• Experience maintaining and enhancing existing enterprise applications.
• Ability to work independently with minimal oversight.
• Experience throughout the Software Development Life Cycle (SDLC).
• Strong written and verbal communication skills., * Experience supporting application modernization initiatives.
• Experience working with APIs and system integrations.
• Familiarity with scheduling and batch processing tools such as CA7, Tidal, FTP, or similar technologies.

What We’re Looking For

The ideal candidate is more than a strong developer. This person should be:

• Comfortable inheriting and maintaining existing code written by others.
• A strong problem solver who enjoys figuring out complex systems.
• Detail-oriented and meticulous in their work.
• Collaborative and team-focused.
• Able to operate independently while also knowing when to ask questions.
• Interested in a long-term engagement and becoming a trusted application expert.

Work Environment

• Standard schedule: Monday-Friday, 8:00 AM - 5:00 PM Eastern.
• Preference for candidates located in Richmond, VA or within driving distance for occasional onsite collaboration.
• Remote candidates in Virginia or the Mid-Atlantic region will be considered.
• Limited production support responsibilities with occasional early-morning issue investigation when needed.

Why This Opportunity?

• Long-term assignment with a strong runway for knowledge transfer.
• Opportunity to become the primary expert for critical business applications.
• Exposure to both legacy systems and modernization efforts.
• Stable team environment with experienced senior developers.
• Direct impact on the future architecture and migration strategy of the organization.

If you are a senior mainframe professional who enjoys solving complex problems, working with critical enterprise applications, and helping organizations modernize legacy systems, we’d love to speak with you.

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.

Everforth Apex uses a virtual recruiter as part of the application process. Click for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at

Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.