Mainframe Developer

November 16, 2022

Location: Springfield, IL

Job Description:

DSN is seeking experienced Mainframe Developers to modify existing business rules and software codes related to state’s government systems.

Position Requirements:

  • Performs as individual or lead programmer for a complex system or subsystem, coordinates the analytical and programming functions required to adapt, convert or maintain applications;
  • Support a complex, interrelated system that automates major technical operation; coordinates programming activities with systems analysts and other development staff;
  • Prepares, reviews and revises program code, JCL and databases.
  • Performs analysis and evaluation of database and program logic;
  • Interviews and consults with stakeholders concerning desirable changes and performs comprehensive studies and analyses of stakeholder needs and objectives
  • Identifies procedures and techniques to convert or improve existing systems.
  • Following approved methodologies, develops detailed systems designs, definitions, flowcharts, and procedures
  • Develops and applies cross-checks and auditing procedures to assure accuracy and reliable practices
  • Determines and corrects deviations from specification for complex applications.
  • Performs program coding, testing and implementation activities using COBOL, Easytrieve Plus, IMS DB/DC and DB2
  • Designs and implements data conversion programs and procedures and develops and implements testing plans, programs and procedures.


  • A bachelor’s degree in Computer Science, Management Information Systems or related fields (or equivalent knowledge, skill, experience and mental development),
  • Four (4) or more years of progressive responsibility and experience in programming and database development; the ability to assist with maintenance, enhancement, and development of mainframe application systems
  • The ability to confer with users to determine technical requirements; perform business and system analysis; code and test application programs
  • Prepare application, user, and operational documentation;
  • Excellent verbal and written communication skills as well as the skill to provide on-line and batch application development/support.
  • Experience with the following technologies
  • Enterprise Mainframe Application Platform :
  • IBM MVS/ESA host operating system environment;
  • Design and testing tools including TSO, JCL, and IBM utilities including Sync Sort and VSAM IDCAMS;
  • IBM’s IMS DB/DC and DB2 for both programming and database design;
  • SQL;
  • COBOL;
  • Easytrieve Plus;
  • interactive debugging tool such as Microfocus Mainframe Express (MFE) and IBM Debugger;
  • Panvalet; and
  • IBM File Manager.


Additional Information:

Diversified Services Network Inc is an Equal Opportunity Employer

Apply Now

  • Max. file size: 100 MB.
  • This field is for validation purposes and should be left unchanged.