Mainframe Network Engineer

Travelers Canada; Hartford (CT); On-site; USD 94,000 - 156,000; Full time

Job summary

Travelers Canada is seeking a Mainframe Network Engineer to join our Enterprise Technology Solutions group. You will support a foundational infrastructure for mainframe systems, compute resources, and storage, balancing legacy stability with cloud-native modernization.

The ideal candidate has strong z/OS skills, experience with VTAM and SNA, and a track record in infrastructure engineering. This role expects collaboration across teams and a focus on security and reliability.

Qualifications

• 3 years of infrastructure engineering/systems administration experience preferred.
• Demonstrated track record of infrastructure expertise across complex systems.
• Deep proficiency in IBM z/OS and z/OS Communications Server.

Responsibilities

• Analyze, design, and implement infrastructure components across mainframe domains with high accuracy.
• Define and implement infrastructure provisioning and configuration management requirements.
• Enhance deployment workflows to improve reliability and efficiency; resolve intermediate issues.
• Configure and optimize physical, virtualized, and cloud infrastructure for high availability and performance.
• Maintain monitoring, capacity planning and incident response while ensuring security compliance.
• Collaborate with software, platform, and operations teams to align infrastructure with business needs.
• Provide guidance to Associate Engineers and contribute to standards and best practices.
• Evaluate new infrastructure technologies for modernization.

Skills

Mainframe expertise

z/OS

JCL

VTAM

TCP/IP

SNA/APPN

Automation scripting

Tools

IBM z/OS

JCL

VTAM

SNA

Job description

Who Are We? Taking care of our customers, our communities and each other. That's the Travelers Promise. By honoring this commitment, we have maintained our reputation as one of the best property casualty insurers in the industry for over 170 years. Join us to discover a culture that is rooted in innovation and thrives on collaboration. Imagine loving what you do and where you do it.

Job Category Technology Compensation Overview The annual base salary range provided for this position is a nationwide market range and represents a broad range of salaries for this role across the country. The actual salary for this position will be determined by a number of factors, including the scope, complexity and location of the role; the skills, education, training, credentials and experience of the candidate; and other conditions of employment. As part of our comprehensive compensation and benefits program, employees are also eligible for performance-based cash incentive awards. Salary Range $94,400.00 - $155,800.00 Target Openings 1

Applicants must be authorized to work for ANY employer in the US. The company does not sponsor/support H-1B petitions, TN, or Forms I-983/STEM OPT, this this role.

What Is the Opportunity?

Travelers is seeking a Mainframe Network Engineer to join our organization as we grow and transform our Enterprise Technology Solutions organization, Our Infrastructure Engineers serve as a foundational cornerstone of the enterprise technology ecosystem, encompassing a diverse portfolio of critical systems that power all business operations. This discipline may include mainframe systems, compute resources, storage solutions, collaboration tools, and specialized platforms that enable system interoperability. As the bedrock layer of the technology stack, Infrastructure Engineering creates the resilient, secure, and scalable environments upon which all other technology services depend, balancing the maintenance of established systems with the adoption of modern cloud-native approaches to drive organizational agility and innovation.

What Will You Do?

Responsible for performing analysis, design, and implementation of infrastructure components across various domains (which may include mainframe systems, collaboration tools, compute resources, storage solutions, or other specialized areas) with a high degree of accuracy.

Technical Execution: Define and implement technical requirements for infrastructure provisioning, configuration management, and operational support using appropriate automation methodologies.

Enhance infrastructure deployment workflows to improve system reliability, resource utilization, and operational efficiency while resolving infrastructure issues of intermediate complexity.

Configure and optimize physical, virtualized, and cloud-based infrastructure to ensure high availability, performance, and operational resilience across multiple technology domains.

Implement and maintain infrastructure monitoring, capacity planning, and incident response procedures while ensuring adherence to security protocols and compliance requirements.

Strategic Input: Collaborate with software, platform, and operations teams to align infrastructure capabilities with application requirements and business needs.

Provide technical guidance to Associate and Sr Associate Infrastructure Engineers while contributing to infrastructure standards and best practices.

Evaluate new infrastructure technologies and methodologies to identify opportunities for operational improvements and technology modernization.

Perform other duties as assigned.

What Will Our Ideal Candidate Have?

Technical Expertise & Education: 3 years of infrastructure engineering/systems administration experience preferred. If specializing in a certain domain of infrastructure engineering, proven expertise in that specific area with ability to work across related systems.

Domain Expertise - Demonstrated track record of infrastructure expertise including the ability to understand system concepts necessary to do the job effectively, demonstrate willingness, cooperation, and concern for business issues, and possess in-depth knowledge of immediate infrastructure systems worked on.

Core Mainframe & Operating System Skills IBM z/OS: Deep proficiency in the z/OS Communications Server environment.

Protocols & Architecture: Hands-on experience with SNA (Systems Network Architecture), VTAM (Virtual Telecommunication Access Method), and APPN/Enterprise Extender for SNA-over-IP communication.

Environment Navigation: Familiarity with standard mainframe interfaces like TSO/ISPF, JCL (Job Control Language), and IOF (Interactive Output Facility.

Networking & Connectivity Skills TCP/IP Stack: Advanced configuration and management of the z/OS TCP/IP stack, routing protocols (OSPF, EIGRP), and Layer 2/Layer 3 integration.

Trace & Packet Analysis: Ability to execute and analyze complex VTAM network traces and sniffer/TCP/IP packet captures to isolate bottlenecks.

Infrastructure Integration: Working knowledge of modern enterprise hardware and software, including switches, firewalls, load balancers, and 3270 emulators.

Security & Policy Management Pagent & AT-TLS: Customization of the z/OS Policy Agent and Application Transparent Transport Layer Security for network policy and encryption rules.

Certificates & Encryption: Administration of digital certificates, keyrings, SSH, and SSL/TLS protocols.

Secure File Transfers: Support for enterprise file-moving tools like SFTP, FTPS, and Connect:Direct.

Automation, Scripting & Monitoring Scripting Languages: Competency in REXX, CLIST, Python, or Linux BASH for workflow automation and generating SMF (System Management Facilities) reports.

Diagnostic Tools: Experience utilizing IBM NetView, IBM or equivalent performance and capacity-planning tools.

Leadership & Influence: Strong communication skills that enable clear, concise interactions with team members and stakeholders.

Your ability to document infrastructure work in an accessible manner, ask clarifying questions on requirements, and actively listen ensures seamless collaboration.

You welcome constructive feedback and use it to continuously improve your approach to infrastructure challenges.

You demonstrate intermediate leadership capabilities with a proven track