Mainframe Network

Must Have Technical/Functional Skills

z/OS fundamentals, TCP/IP networking, VTAM/SNA, RACF security, monitoring tools (SDSF, NETSTAT), and middleware connectivity (CICS, DB2, MQ)

Operational Capabilities:

Incident & change management, performance monitoring, capacity planning, and automation (REXX scripting)

Functional Strengths:

24x7 production support, strong troubleshooting ability, stakeholder coordination, and compliance awareness (SOX/NERC-CIP)

Roles & Responsibilities

1. Network Operations & Monitoring

Perform 24x7 monitoring of mainframe network components and connectivity

Monitor TCP/IP stack, ports, sessions, and communication failures

Track alerts, logs, and performance metrics using monitoring tools

Ensure high availability and stability of network services

1. CP/IP & Connectivity Management

Configure and manage z/OS TCP/IP stack and profiles

Manage ports, IP addressing, DNS resolution, and routing

Ensure connectivity between:

Mainframe ↔ Distributed systems

Mainframe ↔ External applications (middleware, APIs)

Support inter-LPAR communication (Sysplex, HiperSockets)

1. Incident Management & Troubleshooting

Identify, analyze, and resolve network-related incidents (P1/P2/P3)

Troubleshoot:

Connection failures

Port/service issues

MQ/DB2/CICS connectivity problems

Perform root cause analysis (RCA) and provide resolution

Act as single point of contact for network issues (L2)

1. Change & Configuration Management

Implement changes to network configurations (TCP/IP, security rules, ports)

Participate in:

CAB meetings

Change implementation and validation

Maintain network configuration documentation

Ensure minimal disruption during changes

1. Security & Compliance (Critical for Utilities)

Administer network-level security controls using RACF

Implement access controls for ports, services, and users

Support audits and compliance requirements (NERC/CIP, SOX)

Perform vulnerability and patch management activities

1. Middleware & Integration Support

Ensure network connectivity for:

CICS (transaction systems)

DB2 (database connections)

MQ (message queues)

Support distributed integration (WebSphere, APIs, external apps)

Troubleshoot application-level network issues

1. Performance & Capacity Management

Monitor network performance (latency, throughput, session usage)

Identify bottlenecks and optimize configurations

Provide inputs for capacity planning (IP usage, bandwidth)

Generate performance reports and KPIs

1. High Availability & Disaster Recovery

Support HA setup and failover mechanisms

Participate in DR drills and recovery testing

Ensure network readiness during IPLs and system restarts

Maintain network redundancy and resiliency

Salary Range: $110,000- $130,000 a year

TCS Employee Benefits Summary:

Discretionary Annual Incentive.

Comprehensive Medical Coverage: Medical & Health, Dental & Vision, Disability Planning & Insurance, Pet Insurance Plans.

Family Support: Maternal & Parental Leaves.

Insurance Options: Auto & Home Insurance, Identity Theft Protection.

Convenience & Professional Growth: Commuter Benefits & Certification & amp; Training Reimbursement.

Time Off: Vacation, Time Off, Sick Leave & Holidays.

Legal & Financial Assistance: Legal Assistance, 401K Plan, Performance Bonus, College Fund, Student Loan Refinancing.

#LI-SP1

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Role: Engineer

Desired skills: Mainframe | ZOS Admin

Qualifications: BACHELOR OF COMPUTER SCIENCE

• Experience: 10 - 23 Years

• Job function: TECHNOLOGY

• Location: Columbus, OH

Salary range: $110,000–$130,000

Apply by: 2026-08-09 00:00:00