Senior Mainframe Engineer; COBOL​/CICS​/DB; Onsite

NTT DATA strives to hire exceptional, innovative and passionate individuals who want to grow with us.

Onsite in Halifax to join our team in Halifax, Nova Scotia (CA-NS), Canada (CA).

We are seeking a Senior Mainframe Engineer to provide technical leadership in designing, enhancing, and supporting high-volume, mission-critical mainframe applications. In this role, you will drive key initiatives, modernize platform capabilities, mentor engineering teams, and ensure the reliability, scalability, and performance of enterprise systems supporting large-scale transaction processing.

This is an excellent opportunity for an experienced engineer who enjoys solving complex technical challenges while influencing architecture, best practices, and engineering standards.

• Provide technical leadership for strategic mainframe initiatives and platform enhancements.
• Design, develop, and maintain scalable, high-performance solutions for mission-critical applications.
• Define and promote engineering standards, best practices, and code quality.
• Mentor and support engineers through technical guidance, code reviews, and knowledge sharing.
• Evaluate existing platform architecture and recommend improvements to meet evolving business needs.
• Partner with Operations to plan infrastructure upgrades, optimize system performance, and troubleshoot production issues.
• Collaborate with cross-functional teams to improve processes, enhance system reliability, and deliver an exceptional customer experience.
• Participate in design reviews, code reviews, unit testing, and production support activities.

• 8+ years of hands‑on experience with COBOL, DB2, VSAM, and JCL.
• Strong experience developing and supporting high-volume, transaction-intensive mainframe applications.
• Solid knowledge of CICS, including Dynamic Transaction Routing.
• Experience with DB2 utilities, File‑AID, schedulers, and debugging tools.
• Understanding of distributed applications and system integration.
• Experience working with highly available, fault‑tolerant, data‑driven enterprise systems.

• 5+ years of CICS systems experience.
• Experience in the Brokerage, Financial Services, or Capital Markets industry.
• Exposure to large-scale enterprise modernization or platform transformation initiatives.

• Strong analytical and problem‑solving skills with the ability to identify risks and deliver effective solutions.
• Proven ability to lead technical initiatives and influence teams without direct authority.
• Excellent communication and stakeholder management skills across technical and business teams.
• Strong project planning, prioritization, and execution abilities.
• A collaborative mindset with a passion for mentoring and developing other engineers.
• Adaptability in fast‑paced, evolving environments with a focus on continuous improvement and delivering high‑quality solutions.

Where required by law, NTT DATA provides a reasonable range of compensation for specific roles. The starting pay range for this remote role is $84,360 - $146,540. This range reflects the minimum and maximum target compensation for the position across all US locations. Actual compensation will depend on a number of factors, including the candidate’s actual work location, relevant experience, technical skills, and other qualifications.

• Medical, dental, and vision insurance with an employer contribution.
• Flexible spending or health savings account.
• Life and AD&D insurance.
• Short- and long-term disability coverage.
• Paid time off.
• Employee assistance.
• Participation in a 401k program with company match.
• Additional voluntary or legally-required benefits.

NTT DATA is a $30+…