Job Description
Network Engineer is responsible for the design, configuration, implementation, and support of network connectivity for IBM mainframe environments. This role ensures reliable, secure, and high-performing communication between mainframe systems, distributed platforms, external partners, and enterprise applications. The engineer will work on key technologies such as TCP/IP, VTAM, SNA, Enterprise Extender, TN3270, FTP, and network security controls, supporting critical production workloads in large enterprise environments.
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Responsibilities:
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Mainframe Network Administration:
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- Install, configure, and maintain z/OS Communications Server components.
- Support and manage TCP/IP configuration on z/OS systems.
- Maintain and troubleshoot VTAM definitions and network resources.
- Configure and support Enterprise Extender (EE) and SNA connectivity where applicable.
- Maintain TN3270 access and session-related connectivity for end users and applications.
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Network Connectivity & Support:
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- Ensure stable communication between mainframe systems and:
- Distributed servers
- External vendors/partners
- Internal enterprise applications
- Middleware platforms
- Diagnose and resolve connectivity issues involving:
- IP routing
- Port communication
- Session failures
- DNS resolution
- Firewall-related blocks
- Support file transfer protocols such as FTP, SFTP, and other secure data exchange solutions.
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Security & Compliance:
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- Work closely with network security teams to enforce secure communication protocols.
- Ensure compliance with enterprise security controls and audit requirements.
- Support SSL/TLS certificate implementation and secure transmission standards.
- Assist with firewall rule validation, port usage reviews, and vulnerability remediation.
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Disaster Recovery & Resiliency:
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- Support network design and recovery procedures for Disaster Recovery (DR) environments.
- Validate communication paths for failover systems and backup data centers.
- Participate in DR tests and business continuity exercises.
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