https://jobs.co.uk/job/mainframe-tester-ascendion--257a1182-ead4-4e9f-95b9-9722486047cc RSS feed for Mainframe Tester at Ascendion. en-gb Wed, 10 Jun 2026 15:34:50 GMT https://jobs.co.uk/job/mainframe-tester-ascendion--257a1182-ead4-4e9f-95b9-9722486047cc https://jobs.co.uk/job/mainframe-tester-ascendion--257a1182-ead4-4e9f-95b9-9722486047cc Tue, 19 May 2026 11:53:12 GMT Location: Chester | Salary: 10000-500000 Annual | 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. Permanent