https://jobs.co.uk/job/mainframe-tester-ascendion--cefee5a5-57f2-4a17-b46e-0366542ae47f RSS feed for Mainframe Tester at Ascendion. en-gb Wed, 10 Jun 2026 15:34:05 GMT https://jobs.co.uk/job/mainframe-tester-ascendion--cefee5a5-57f2-4a17-b46e-0366542ae47f https://jobs.co.uk/job/mainframe-tester-ascendion--cefee5a5-57f2-4a17-b46e-0366542ae47f Mon, 18 May 2026 23:00:00 GMT Location: Chester | Salary: Negotiable | Type: Permanent | We are looking for a Mainframe Tester -with experience in testing and automating mainframe applications. Responsibilities Develop and maintain automated test scripts using COBOL, JCL, and DB2 . Design, execute, and automate test cases for functionality, performance, and security validation. Collaborate with developers and business analysts to understand requirements and identify test scenarios. Perform functional, regression, and integration testing. Track and report defects and support issue resolution. Required Skills Experience in Mainframe Testing. Strong knowledge of COBOL, JCL, and DB2 . Understanding of SDLC/STLC and testing methodologies. Good analytical and communication skills. </ul Permanent