Mainframe Systems Analyst / Interface & Documentation Specialist

CTG is seeking to fill a Mainframe Systems Analyst / Interface & Documentation Specialist position for our client. Location: Remote Duration: 12 months Employment Type: W2 contract Duties Analyze complex mainframe interfaces, data flows, batch processes, and system dependencies across multiple applications. Analyze and document Systematics interfaces and data flows, including RM, IM, IT, GN, and ALS/AIS. Develop and independently validate source-to-target data mappings, including file layouts, element IDs, offsets, lengths, and data transformations. Create and maintain interface inventories documenting file and record layouts, processing schedules, application dependencies, system owners, and subject matter experts (SMEs). Trace files, batch jobs, reports, interfaces, and processing flows across systems to validate data movement and investigate discrepancies. Develop data-flow diagrams, process diagrams, batch/job/file traceability documentation, interface specifications, and technical process summaries. Gather, analyze, and document Business Requirements and Functional Requirements in collaboration with business owners, SMEs, and technical teams. Review existing documentation, identify gaps or inconsistencies, and validate findings with business owners, SMEs, and technical teams. Document unresolved questions, assumptions, and dependencies while working with stakeholders to clarify incomplete or outdated information. Create and maintain reusable technical documentation, including source-to-target mappings, requirements, process documentation, PBIs, and supporting artifacts. Incorporate review feedback, maintain version-controlled deliverables, and conduct documentation walkthroughs to ensure established acceptance criteria are met. Skills Required experience with Systematics, including interfaces and data flows associated with RM, IM, IT, GN, and ALS/AIS. Strong hands-on knowledge of COBOL, CICS, DB2, JCL, VSAM, copybooks, and mainframe file layouts. Strong understanding of mainframe interfaces, data integration, batch processing, and application dependencies. Proficiency in source-to-target data mapping, data-flow analysis, and technical documentation. Experience documenting Business Requirements and Functional Requirements. Excellent analytical, troubleshooting, and problem-solving skills with exceptional attention to detail. Ability to independently trace and validate technical information rather than relying solely on existing documentation. Strong written and verbal communication skills, including the ability to translate complex technical concepts for technical and business audiences. Ability to collaborate with system owners and SMEs to resolve questions, validate requirements, and address documentation gaps. Experience Demonstrated experience analyzing complex mainframe applications, interfaces, and end-to-end data flows. Hands-on experience with Systematics applications and interfaces, particularly RM, IM, IT, GN, and ALS/AIS. Hands-on experience tracing batch jobs, files, reports, interfaces, and dependencies across multiple systems. Experience validating file-level source-to-target mappings, including data elements, offsets, lengths, and transformations. Experience gathering and documenting Business Requirements and Functional Requirements for mainframe applications and interfaces. Proven ability to create accurate technical diagrams, interface inventories, process documentation, requirements documentation, and reusable technical artifacts. Experience investigating legacy systems, identifying inconsistencies, and validating undocumented or outdated processes. Ability to work independently, manage detailed documentation deliverables, incorporate review feedback, and collaborate effectively with cross-functional stakeholders. 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: To be considered, please apply directly to this requisition using the link provided. Kindly forward this to any other interested parties. Thank you! The expected base salary for this position ranges from $69.00 to $74.00/hour. Salary offers are based on a wide range of factors including relevant skills, training, experience, education, market factors, and where applicable, licensure or certifications obtained. In addition to salary, a competitive benefit package is also offered. About CTG 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.