Mainframe Senior Developer

Northern Trust Asset Management
Chicago, IL
About Northern Trust

Northern Trust, a Fortune 500 company, is a globally recognized, award-winning financial institution that has been in continuous operation since 1889.

Northern Trust is proud to provide innovative financial services and guidance to the world’s most successful individuals, families, and institutions by remaining true to our enduring principles of service, expertise, and integrity. With more than 130 years of financial experience and over 22,000 partners, we serve the world’s most sophisticated clients using leading technology and exceptional service.

Northern Trust is looking for a consultant for the role of Mainframe Senior Developer to join its existing Project team located in Chicago.

Job Description AND Principal Responsibilities

The Mainframe Senior Developer is responsible for installing, maintaining, upgrading, and supporting various system software products for TNT's z/OS operating system environment. They require skills including, but not limited to DB2 database and tools, COBOL and PL/1 programming, JCL, and Strong Assembly level Programming skills along with CICS expertise.

The Resource Should Be Able To Confidently

  • Communicate status to, and work in conjunction with client stakeholders, project managers, team

members, and management.

  • Work on Primitive CICS Systems and re-create them in lower environment.
  • Work on Assembler and PL/1 Programs to modify, test and De-bug Efficiently.
  • Provide solutions to modernize existing primitive architecture based on mainframe systems.
  • Ensure solutions provide system stability by following best practices and TNT change control and

support methodologies

  • work to arrive at multiple design features and brainstorm with the team/SME’s.
  • Analyze, evaluate, troubleshoot, test, document, and implement system software upgrades and new

software packages per client specifications

  • Support Software Development Lifecycle (SDLC) methodologies and Agile Framework
  • Ensure peak software/system performance by monitoring software usage and implementing

suggested changes

  • Adapt to changing roles and dynamic priorities
  • Work with people of different personalities and backgrounds
  • Prioritize work independently

Modernization Experience

Education/Experience

15+ years of experience required in the following areas:

  • IBM mainframe experience
  • JCL
  • DB2
  • Strong SQL Skills
  • Experience in developing Stored Procedures – both Cobol and Native
  • Strong Assembler Programming/De-bugging skill.
  • Cobol Programming Language
  • PL/1 Programming Language
  • CICS
  • Handson Github/IDz Experience
  • Good knowledge and hands-on experience on IBM utilities, FileAid, QMF, SPUFI
  • Knowledge of DFSORT, Version control tool
  • Excellent oral and written communication skills are required
  • Independently makes sound and timely, fact-based decisions.
  • - Microsoft Visio.

Bachelor’s Degree in Computer Science, Information Management, or related field preferred

Nice To Have

  • Experience in Control-M Scheduling
  • Data Analysis tools and skills
  • Preferred Financial Services/Banking experience.

Salary Range

$99,600 - 169,200 USD

Salary range is a good faith estimate of base pay. Northern Trust provides a comprehensive benefits package including retirement benefits (401k and pension), health and welfare benefits (medical, dental, vision, spending accounts and disability), paid time off, parental and caregiver leave, life & accident insurance, and other voluntary and well-being benefits. Northern Trust also provides a discretionary bonus program that may include an equity component.

Working With Us

As a Northern Trust partner, greater achievements await. You will be part of a flexible and collaborative work culture in an organization where financial strength and stability is an asset that emboldens us to explore new ideas.

Movement within the organization is encouraged, senior leaders are accessible, and you can take pride in working for a company committed to assisting the communities we serve! Join a workplace with a greater purpose.

We’d love to learn more about how your interests and experience could be a fit with one of the world’s most admired and sustainable companies! Build your career with us and apply today. #MadeForGreater

Reasonable accommodation

Northern Trust is committed to working with and providing reasonable accommodations to individuals with disabilities. If you need a reasonable accommodation for any part of the employment process, please email our HR Service Center at [email protected].

We hope you’re excited about the role and the opportunity to work with us. We value an inclusive workplace and understand flexibility means different things to different people.

Apply today and talk to us about your flexible working requirements and together we can achieve greater.
Posted 2026-03-15

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