Senior Mainframe Technical Lead - z/OS, DB2 & Automation

Accrescent Group; San Antonio (TX); On-site; USD 150,000 - 190,000; Full time

Job summary

Accrescent Group seeks an experienced Mainframe Technical Lead to lead a skilled team responsible for enterprise z/OS infrastructure, DB2 environments, and supporting subsystems. You will drive incident resolution, capacity planning, and security, while ensuring high availability across the platform.

The role blends hands-on technical leadership with customer engagement, governance, and team development in a 24x7 mission-critical setting. Strong mentoring and communication skills are essential.

Qualifications

• Minimum 10+ years of Mainframe infrastructure experience with leadership ability.
• Hands-on expertise with z/OS, CICS, DB2 for z/OS, and related subsystems.
• Proven ability to manage 24x7 production environments and incidents.
• Strong communication with customers and stakeholders across teams.
• Experience mentoring and developing engineering staff.
• Preferred IBM z/OS and DB2 certifications; ITIL is a plus.

Responsibilities

• Lead and mentor Mainframe teams across onsite, offshore, and nearshore groups.
• Provide L3 support for complex z/OS, CICS, DB2, JES, RACF and related issues.
• Oversee installation, configuration, migration, and upgrades of z/OS and ISV products.
• Drive incident, problem, change, capacity, availability, and performance activities.
• Perform RCA and implement preventive actions to meet SLAs.
• Lead IPLs, deployments, software refreshes, hardware upgrades, and DR testing.
• Define procedures, automation strategies, backup/recovery plans, and governance.
• Oversee DB2 administration, utilities, RUNSTATS, REORG, and security.
• Collaborate with application teams on DB2 performance optimization.
• Advance automation using REXX, JCL, z/OSMF, Ansible, and monitoring tools.
• Identify skill gaps and develop training plans for continuous improvement.

Skills

z/OS

MVS

JES2/JES3

Parallel Sysplex

RACF

CICS administration

DB2 for z/OS

RMF/SMF

NetView

Ansible

Education

Bachelor's degree in Computer Science

Tools

z/OSMF

SMP/E

RSU maintenance

ISV product administration

Mainframe monitoring tools

Job description

Accrescent Group seeks an experienced Mainframe Technical Lead to lead a skilled team responsible for enterprise z/OS infrastructure, DB2 environments, and supporting subsystems. You will drive incident resolution, capacity planning, and security, while ensuring high availability across the platform.

The role blends hands-on technical leadership with customer engagement, governance, and team development in a 24x7 mission-critical setting. Strong mentoring and communication skills are essential.