{"schemaVersion":"jobsearcher.job.v1","id":"10841f032e7942fbf3ac12ce","url":"https://jobsearcher.com/jobs/10841f032e7942fbf3ac12ce","canonicalUrl":"https://jobsearcher.com/jobs/10841f032e7942fbf3ac12ce","title":"Software Engineer III (Mainframe Assembler(HLASM)- z/OS Security & Systems (zAssure Portfolio)","description":"It's fun to work in a company where people truly BELIEVE in what they're doing!\n\nJob Description Summary:\n\nRocket Software is seeking a Mainframe Engineer to join the zAssure Security Portfolio team. This role focuses on deep system-level engineering, security analysis, and advanced diagnostics within z/OS environments.\n\nThis is a highly specialized role requiring strong expertise in z/OS internals, HLASM (Assembler), and system-level debugging. The role combines product engineering with complex troubleshooting and customer-facing escalation support, making it critical to the success of our security solutions.\n\nThe ideal candidate brings hands-on experience working with low-level system constructs, the ability to diagnose complex production issues, and a strong ownership mindset.\n\nKey Responsibilities\n\nDesign, develop, and maintain HLASM-based components for z/OS security and system tooling (VAP and related products)\nDiagnose complex issues using z/OS diagnostic tools (including GTF traces)\nAnalyze APF-authorized programs, SVCs, PC routines, and system behavior\nPerform deep root cause analysis for performance, system failures, and security exposures\nWork with JCL, ISPF, SDSF, and system utilities to debug and validate behavior\nCollaborate with engineering and support teams on L3 escalations and product fixes\nContribute to tooling, automation, and modernization efforts\nApply modern development practices (Git, AI-assisted debugging/workflows)\n\nRequired Qualifications\n\nMinimum 10 years of experience in z/OS environments\nStrong expertise in: HLASM (Assembler) z/OS internals (mandatory)\nHands-on experience with: JCL, ISPF, SDSF Batch job debugging and system diagnostics\nProven experience in: Collecting and analyzing GTF traces (required) Debugging low-level system issues\nStrong understanding of: APF authorization, SVC, PC, memory and execution model z/OS security concepts (RACF awareness)\nExperience with Git or modern version control\nStrong problem-solving, debugging, and analytical skills\n\nHighly Desirable\n\nREXX scripting experience\nKnowledge of: System exits, hooks, and intercepts\nPerformance tuning and advanced diagnostics\nExposure to: DB2, VSAM, or system-level data structures\nExperience supporting customer escalations / L3 roles\n\nWork Model\n\nCollaborate with global (US-based) teams\nFlexibility for overlapping time zones when required\nOperate with high ownership and minimal supervision\n\n.\n\nRocket Software Inc. is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. Rocket Software Inc. is also committed to compliance with all fair employment practices regarding citizenship and immigration status.\n\nAt Rocket Software, we believe AI is a critical enabler of innovation and productivity. All Rocketeers are expected to actively leverage AI-powered tools and technologies, where appropriate, to enhance efficiency, improve decision-making, and deliver greater impact in their roles. Embracing continuous learning and the responsible use of AI is an essential part of how we work.\n\nAs part of our commitment to a safe and trustworthy workplace, we include background and reference checks in our hiring process.\n\nRocket is committed to working with and providing reasonable accommodation to individuals with physical and mental disabilities. If you need special assistance or an accommodation while seeking employment, please call: 781-577-4321 or send an email to people@rocketsoftware.com. We will make a determination on your request for reasonable accommodation on a case-by-case basis.\n\nIf you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!","company":"Rocketsoftware","rawCompany":"rocketsoftware","city":"Denver","state":"CO","isRemote":false,"isActive":false,"createdAt":"2026-09-06T13:00:28.654Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1211.00","title":"Computer Systems Analysts","slug":"computer-systems-analysts"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Software Engineer III (Mainframe Assembler(HLASM)- z/OS Security & Systems (zAssure Portfolio)","description":"It's fun to work in a company where people truly BELIEVE in what they're doing!\n\nJob Description Summary:\n\nRocket Software is seeking a Mainframe Engineer to join the zAssure Security Portfolio team. This role focuses on deep system-level engineering, security analysis, and advanced diagnostics within z/OS environments.\n\nThis is a highly specialized role requiring strong expertise in z/OS internals, HLASM (Assembler), and system-level debugging. The role combines product engineering with complex troubleshooting and customer-facing escalation support, making it critical to the success of our security solutions.\n\nThe ideal candidate brings hands-on experience working with low-level system constructs, the ability to diagnose complex production issues, and a strong ownership mindset.\n\nKey Responsibilities\n\nDesign, develop, and maintain HLASM-based components for z/OS security and system tooling (VAP and related products)\nDiagnose complex issues using z/OS diagnostic tools (including GTF traces)\nAnalyze APF-authorized programs, SVCs, PC routines, and system behavior\nPerform deep root cause analysis for performance, system failures, and security exposures\nWork with JCL, ISPF, SDSF, and system utilities to debug and validate behavior\nCollaborate with engineering and support teams on L3 escalations and product fixes\nContribute to tooling, automation, and modernization efforts\nApply modern development practices (Git, AI-assisted debugging/workflows)\n\nRequired Qualifications\n\nMinimum 10 years of experience in z/OS environments\nStrong expertise in: HLASM (Assembler) z/OS internals (mandatory)\nHands-on experience with: JCL, ISPF, SDSF Batch job debugging and system diagnostics\nProven experience in: Collecting and analyzing GTF traces (required) Debugging low-level system issues\nStrong understanding of: APF authorization, SVC, PC, memory and execution model z/OS security concepts (RACF awareness)\nExperience with Git or modern version control\nStrong problem-solving, debugging, and analytical skills\n\nHighly Desirable\n\nREXX scripting experience\nKnowledge of: System exits, hooks, and intercepts\nPerformance tuning and advanced diagnostics\nExposure to: DB2, VSAM, or system-level data structures\nExperience supporting customer escalations / L3 roles\n\nWork Model\n\nCollaborate with global (US-based) teams\nFlexibility for overlapping time zones when required\nOperate with high ownership and minimal supervision\n\n.\n\nRocket Software Inc. is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. Rocket Software Inc. is also committed to compliance with all fair employment practices regarding citizenship and immigration status.\n\nAt Rocket Software, we believe AI is a critical enabler of innovation and productivity. All Rocketeers are expected to actively leverage AI-powered tools and technologies, where appropriate, to enhance efficiency, improve decision-making, and deliver greater impact in their roles. Embracing continuous learning and the responsible use of AI is an essential part of how we work.\n\nAs part of our commitment to a safe and trustworthy workplace, we include background and reference checks in our hiring process.\n\nRocket is committed to working with and providing reasonable accommodation to individuals with physical and mental disabilities. If you need special assistance or an accommodation while seeking employment, please call: 781-577-4321 or send an email to people@rocketsoftware.com. We will make a determination on your request for reasonable accommodation on a case-by-case basis.\n\nIf you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!","datePosted":"2026-09-06T13:00:28.654Z","dateModified":"2026-09-06T13:00:28.654Z","hiringOrganization":{"@type":"Organization","name":"Rocketsoftware","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Denver","addressRegion":"CO","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"10841f032e7942fbf3ac12ce"},"url":"https://jobsearcher.com/jobs/10841f032e7942fbf3ac12ce"}}