Mainframe Network Engineer

CTG is seeking a Mainframe Network Engineer for our client.

Location: Phoenix, AZ metro area (Hybrid) Duration: 6 months with option to convert after 6 months Citizenship: US Citizens (USC), Permanent Residents (PR), and other EAD holders only (no visa-dependent candidates)

Responsible for designing, supporting, and optimizing enterprise mainframe network infrastructure. This role ensures secure, reliable, and high-performance connectivity between IBM mainframes (z/OS), distributed systems, cloud environments, and external partners in support of critical business operations.

• Design, configure, and support mainframe network environments and connectivity solutions
• Manage IBM mainframe communications including VTAM, TCP/IP, SNA, TN3270, and FTP
• Troubleshoot complex connectivity issues and perform root cause analysis
• Support z/OS network services and communication subsystems
• Ensure secure connectivity including firewall, encryption, and access controls
• Collaborate with infrastructure, security, and application teams across enterprise initiatives
• Support disaster recovery, high availability, and business continuity planning
• Perform performance tuning and capacity planning for mainframe communications
• Maintain technical documentation, standards, and operational procedures
• Participate in incident response and change management processes
• Support integration between mainframe, distributed, and cloud environments

• 5+ years of experience in mainframe networking or enterprise infrastructure support
• Strong expertise in IBM mainframe communications (VTAM, TCP/IP, SNA, TN3270, FTP)
• Experience with z/OS networking and subsystem configuration
• Strong troubleshooting, performance tuning, and RCA skills
• Knowledge of enterprise network security principles
• Experience supporting hybrid mainframe and distributed/cloud environments
• Strong documentation and communication skills

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or related field preferred (or equivalent experience)

Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required.

CTG does not accept unsolicited resumes from headhunters, recruitment agencies, or fee-based recruitment services for this role.

To Apply: Please apply directly via the provided requisition link. Kindly forward to any interested parties.

CTG, a Cegeka company, delivers IT and business solutions that enhance clients’ digital agility, empowering them to seize new opportunities and overcome any challenge. Backed by more than 60 years’ experience and a commitment to being a reliable, results-driven partner, we work shoulder to shoulder with clients to shape digital together. Our vision is to be an indispensable partner to our clients and the preferred career destination for digital and technology experts. With more than 9,000 team members in over 15 countries, we combine global expertise with local insight to deliver innovative solutions. We operate across the Americas, Europe, and India, working with over 3,000 clients in many of today's highest-growth industries.

Together, we shape what’s next—working shoulder to shoulder to deliver impactful solutions for our clients and society. Our culture is built by the people who work at CTG, the values we hold, and the actions we take. It's a living, breathing thing that is renewed every day through the ways we engage with each other, our clients, and our communities. At CTG, you’ll find a workplace where you are encouraged to grow, supported in your ambitions, and empowered to shape your own career journey. For more information, visit www.ctg.com .

CTG will consider for employment all qualified applicants including those with criminal histories in a manner consistent with the requirements of all applicable local, state, and federal laws.

CTG is an Equal Opportunity Employer. CTG will assure equal opportunity and consideration to all applicants and employees in recruitment, selection, placement, training, benefits, compensation, promotion, transfer, and release of individuals without regard to race, creed, religion, color, national origin, sex, sexual orientation, gender identity and gender expression, age, disability, marital or veteran status, citizenship status, or any other discriminatory factors as required by law. CTG is fully committed to promoting employment opportunities for members of protected classes.