Mainframe Network Engineer; W2

Job Overview

Location: Phoenix, AZ Metro Area (Hybrid)
Job Type: W2 Contract

We are seeking an experienced Mainframe Network Engineer to support and maintain enterprise‑level mainframe network infrastructure in a hybrid working environment. The ideal candidate will have strong expertise in mainframe networking technologies, TCP/IP configuration, VTAM, and z/OS systems administration. This role requires collaboration with infrastructure, security, and application teams to ensure high availability, performance, and reliability of mainframe network services.

• Design, configure, implement, and support mainframe network infrastructure.
• Manage and troubleshoot TCP/IP, VTAM, and SNA network environments on IBM z/OS systems.
• Monitor network performance and resolve connectivity, latency, and communication issues.
• Support mainframe connectivity with distributed systems and enterprise applications.
• Perform network configuration changes, upgrades, patching, and system maintenance activities.
• Analyze system logs, network traces, and performance metrics for issue resolution.
• Work closely with security teams to implement and maintain network security standards and compliance requirements.
• Support disaster recovery, business continuity, and high‑availability initiatives.
• Create and maintain technical documentation, operational procedures, and architecture diagrams.
• Participate in on‑call support and production issue resolution when required.
• Collaborate with cross‑functional teams including infrastructure, middleware, and application support teams.

• 8 years of experience in Mainframe Network Engineering or Mainframe Systems Administration.
• Strong hands‑on experience with IBM z/OS environments.
• Expertise in TCP/IP, VTAM, SNA, and mainframe communication protocols.
• Experience with IBM Communications Server and network performance tuning.
• Knowledge of JES2/JES3, TSO/ISPF, SDSF, and system utilities.
• Experience supporting secure network connectivity and troubleshooting network‑related issues.
• Strong understanding of enterprise networking concepts including DNS, routing, and firewalls.
• Experience with automation and monitoring tools in mainframe environments.
• Excellent analytical, troubleshooting, and communication skills.

• Experience in banking, financial services, healthcare, or large enterprise environments.
• Knowledge of RACF security administration and compliance standards.
• Familiarity with disaster recovery planning and implementation.
• Experience with hybrid cloud integration and enterprise connectivity solutions.
• IBM Mainframe certifications are a plus.

• Bachelor's degree in Computer Science, Information Technology, or related field preferred.