Senior Mainframe Technical Lead (z/OS, DB2, CICS)

TechDigital Group; Plano (TX); On-site; USD 130,000 - 180,000; Full time

Job summary

TechDigital Group is seeking an experienced Mainframe Technical Lead (L3) to lead and manage a team supporting enterprise z/OS infrastructure and Mainframe DB2 environments.

You will be responsible for platform availability, performance, security, modernization, incident resolution, and operational excellence across z/OS, CICS, DB2, Storage, RACF, and related subsystems. This role blends hands-on leadership with governance for 24x7 mission-critical environments.

Qualifications

• 10+ years of Mainframe infrastructure experience.
• Strong customer-facing communication and stakeholder management skills.
• Experience supporting large-scale 24x7 production environments.
• Strong documentation, governance, audit, and operational process management skills.
• Ability to lead critical incidents, manage escalations, and handle high-pressure situations.
• Strong mentoring, coaching, and team development capabilities.

Responsibilities

• Lead and mentor Mainframe Systems Programmers and DB2 Administrators across onsite, offshore, and nearshore teams.
• Provide L3 support for complex z/OS, CICS, DB2, JES, RACF, USS, storage, and subsystem-related issues.
• Manage installation, configuration, migration, customization, maintenance, and upgrades of z/OS and ISV products.
• Drive incident, problem, change, capacity, availability, and performance management activities.
• Perform RCA, implement preventive actions, and ensure compliance with SLA and operational commitments.
• Lead IPL activities, maintenance deployments (RSU/SMP-E), software refreshes, hardware upgrades, and disaster recovery testing.
• Define operational procedures, automation strategies, backup/recovery plans, and governance standards.
• Oversee Mainframe DB2 administration including subsystem management, utilities, backup/recovery, performance tuning, security, capacity planning, migrations, and database availability.
• Partner with application teams on DB2 performance optimization, SQL tuning, and database best practices.
• Drive automation initiatives using REXX, JCL, z/OSMF, Ansible, and monitoring tools to improve operational efficiency.
• Identify skill gaps, develop training plans, and ensure continuous capability improvement within the team.

Skills

Mainframe leadership

Customer-facing communication

Incident management

Mentoring and coaching

Team development

Education

IBM z/OS certifications

ITIL certification

Tools

z/OS

JES2/JES3

Parallel Sysplex

GDPS

RACF

JCL

REXX

ISV product administration

NetView

System Automation (SA z/OS)

BMC MainView

OMEGAMON

Ansible

Job description

TechDigital Group is seeking an experienced Mainframe Technical Lead (L3) to lead and manage a team supporting enterprise z/OS infrastructure and Mainframe DB2 environments.

You will be responsible for platform availability, performance, security, modernization, incident resolution, and operational excellence across z/OS, CICS, DB2, Storage, RACF, and related subsystems. This role blends hands-on leadership with governance for 24x7 mission-critical environments.