All Services Programming & Development legacy computer systems $200/hr · Starting at $200 Ibm z-OS and legacy systems programming and review. Install, test, maintain and debug assembler, and other mainframe languages. Up to date and extremely well qualified for your legacy system. About $200/hr · Ongoing Download Resume Ibm z-OS and legacy systems programming and review. Install, test, maintain and debug assembler, and other mainframe languages. Up to date and extremely well qualified for your legacy system. Skills & Expertise ProgrammingReview WritingSystems Engineering 0 Reviews This Freelancer has not received any feedback. Browse Similar Freelance Experts Review WritersComputer Programmers