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Sr. Mainframe Engineer

Conexess Group

Role overview

Qualifications

  • Hands-on experience supporting IBM z/OS in production environments
  • Strong working knowledge of CICS or IMS (configuration, transactions, regions)
  • Proficiency with JCL, ISPF, SDSF, and core z/OS operational tooling
  • Working knowledge of DB2 for z/OS, MQ, and one or more of (CTG, SOAP, z/OS Connect)

Responsibilities

  • Act as escalation owner for complex, high-impact mainframe-related customer issues involving z/OS
  • Lead advanced troubleshooting across CICS, IMS, DB2, MQ, z/OS infrastructure, and related middleware
  • Perform deep diagnostics using dumps, traces, logs, and runtime artifacts to isolate root cause
  • Provide consultative guidance on mainframe architecture, deployment patterns, and performance optimization

Key facts

Hard skills

CBASIC DB2/400 JConsole MQX Java (Programming Language) .NET

Other skills

  • Problem Solving
  • Communication
  • Troubleshooting (Problem Solving)
  • Diagnostic Skills

About the company

Conexess Group logo

Conexess Group

Staffing & Recruiting

Conexess Group is a staffing and consulting solutions provider that combines the technology you need with relationships you can trust. We understand that one size never fits all, which is why we work with our clients to develop specialized solutions that fit their organizations, coupled with responsive service that ensures we get the job done right. By getting to know our clients on a deeply personal level, we unlock the potential of our elite technical knowledge and talent network, granting access to game-changing consultants and concierge-level service. And our 80 years of combined experience enables us to attract only the best specialized talent, whom we always treat with the utmost respect and professionalism. In fact, many of our consultants have come to view Conexess as a career counselor, providing constant updates on the latest opportunities. Our culture and values reflect our innovative approach toward attracting and retaining the most talented experts and producing consistent results for our Fortune 500 and mid-cap clients. Known for our technological leadership and entrepreneurial passion, our firm has been delivering value to our clients by providing solutions to their most complex challenges. Whether you’re in need of specialized talent or a boost to your career, we look forward to working with you. Specialties: IT Staff Augmentation | ERP Consulting Solutions | Accounting & Finance Recruitment

Company details

Company typeSME
IndustryStaffing & Recruiting
Company size51 - 200

Links

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Job description

Provide deep, customer-facing technical expertise for Mainframe environments, bridging classic z/OS platforms with modern distributed and cloud-native observability. This role operates at the intersection of Support, Consulting, and Enablement and is intended to reduce dependency on R&D, accelerate customer outcomes, and de-risk high-value enterprise deployments.
This position is not a traditional systems programmer role, but a modern z/OS systems support / diagnostics specialist focused on troubleshooting, customer impact, and cross-platform observability.
Primary Responsibilities
  • Act as escalation owner for complex, high-impact mainframe-related customer issues involving z/OS
  • Lead advanced troubleshooting across CICS, IMS, DB2, MQ, z/OS infrastructure, and related middleware
  • Perform deep diagnostics using dumps, traces, logs, and runtime artifacts to isolate root cause
  • Provide consultative guidance on mainframe architecture, deployment patterns, and performance optimization
  • Partner with Product Management and R&D on edge cases, diagnostics, and design feedback
  • Support customer-facing workshops, proofs of concept, and enablement sessions requiring mainframe depth
  • Mentor and upskill non-mainframe Support Engineers through documentation, walkthroughs, and structured knowledge transfer
What will help you succeed
Required Technical Qualifications
  • Hands-on experience supporting IBM z/OS in production environments
  • Strong working knowledge of CICS or IMS (configuration, transactions, regions)
  • Proficiency with JCL, ISPF, SDSF, and core z/OS operational tooling
  • Working knowledge of DB2 for z/OS, MQ, and one or more of (CTG, SOAP, z/OS Connect)
  • Familiarity with RACF/ACF2 security concepts
  • Demonstrated ability to capture, interpret, and analyze dumps, traces, and diagnostic artifacts
  • Strong diagnostic and problem‐solving skills, with the ability to work through ambiguous, multi-system issues
Preferred / Differentiating Skills
  • Background in customer-facing enterprise support, consulting, or escalation roles
  • Exposure to distributed systems (Java, .NET, HTTP, cloud platforms) sufficient to communicate and troubleshoot across platform boundaries
  • Strong written and verbal communication skills, with the ability to explain complex mainframe concepts to non-mainframe audiences
  • Experience acting as a technical bridge between legacy platforms and modern application architectures
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Marcus Rivera

Chief Revenue Officer

m.rivera@company.com
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