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

2. 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)

3. 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)

4. 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

5. 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

6. 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

7. 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

8. 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.

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