Mainframe Network

Job Overview

Senior Mainframe Network Engineer – Columbus, OH. Requires 10-23 years of experience.

Columbus, OH | Technology

BACHELOR OF COMPUTER SCIENCE

$110,000- $130,000 a year

• 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 & Training Reimbursement
• Time Off:
  Vacation, Time Off, Sick Leave & Holidays
• Legal & Financial Assistance:
  Legal Assistance, 401k Plan, Performance Bonus, College Fund, Student Loan Refinancing

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

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

• 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

• Configure and manage z/OS TCP/IP stack and profiles
• Manage ports, IP addressing, DNS resolution, and routing
• Ensure connectivity between mainframe and external applications (middleware, APIs)
• Support inter-LPAR communication (Sysplex, Hiper Sockets)
• Identify, analyze, and resolve network-related incidents (P1/P2/P3)
• Troubleshoot port/service issues and MQ/DB2/CICS connectivity problems
• Perform root cause analysis (RCA) and provide resolution
• Act as single point of contact for network issues (L2)

• Implement changes to network configurations (TCP/IP, security rules, ports)
• Validate change implementation

• 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

• Ensure network connectivity for CICS (transaction systems) and DB2 (database connections)
• Support distributed integration (Web Sphere, APIs, external apps)
• Troubleshoot application-level network issues

• 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

• 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