{"schemaVersion":"jobsearcher.job.v1","id":"2d2d8066165b45eabd265cd1","url":"https://jobsearcher.com/jobs/2d2d8066165b45eabd265cd1","canonicalUrl":"https://jobsearcher.com/jobs/2d2d8066165b45eabd265cd1","title":"COBOL/Mainframe Developer (W-2 Contract)","description":"Job Overview\nWe are seeking a highly skilled COBOL/Mainframe Developer to join a local IT team.\nThis role involves designing, developing, and maintaining legacy mainframe applications primarily built in COBOL, while integrating modern technologies and architectures to ensure robust, scalable, and secure systems.\nThe ideal candidate will possess a deep understanding of mainframe environments, system architecture, and a broad spectrum of related technologies such as service-oriented architecture, solution architecture, and cloud security.\nThis position offers an exciting opportunity to work on mission-critical systems that support large-scale enterprise operations across diverse industries.\nDuties\nDevelop, test, and implement COBOL programs within mainframe environments to meet business requirements efficiently.\nMaintain and enhance existing legacy applications while ensuring system stability and performance.\nCollaborate with cross-functional teams to design system architecture solutions that incorporate ETL processes, RESTful APIs, and microservices.\nConduct system analysis and debugging to identify issues related to COBOL code, JCL (Job Control Language), or mainframe operations.\nIntegrate mainframe applications with modern platforms such as Salesforce, Pegasystems, or cloud services like AWS and Azure.\nPerform system hardening, vulnerability assessments, and implement security best practices including firewall configuration, VPN setup, and system hardening techniques.\nSupport continuous integration/continuous deployment (CI/CD) pipelines using tools such as Jenkins or Git for efficient development cycles.\nParticipate in system architecture planning involving load balancing, virtualization (VMware/ESXi), and container orchestration with Kubernetes.\nAssist in the migration of legacy systems to cloud environments while ensuring data integrity and security compliance.\nDocument technical specifications and provide training or support for end-users and junior developers.\nRequirements\nProven experience as a COBOL/Mainframe Developer with extensive knowledge of IBM z/OS or similar mainframe operating systems.\nStrong understanding of service-oriented architecture (SOA), solution architecture, and enterprise system design principles.\nProficiency in programming languages including COBOL, C++, C#, Java, Python, and scripting languages such as Bash or Shell Scripting.\nFamiliarity with database management systems like IBM DB2, Oracle, PostgreSQL, MySQL, or NoSQL databases; experience with SQL/T-SQL is essential.\nKnowledge of IT infrastructure components including load balancing, firewalls, DNS/DHCP management, VPNs, and network security protocols.\nExperience working within Agile methodologies and SDLC (Software Development Life Cycle) frameworks.\nHands-on expertise with DevOps tools such as Jenkins, Git repositories, CI/CD pipelines, and system automation tools.\nUnderstanding of modern web services including SOAP/REST APIs and integration techniques using XML/JSON formats.\nKnowledge of cloud platforms such as AWS or Azure along with virtualization technologies like VMware or ESXi.\nStrong problem-solving skills with the ability to debug complex issues across multiple layers of the technology stack.\nEducation & Experience\n10+ years of experience within mainframe development\nExperience with incident triage and troubleshooting\nMust be highly proficient in each of the following…\nCOBOL\nEasytrieve\nJCL\nCICS\nTSO\nProduction Incident Support (both batch and real-time)\nBachelor’s degree in IT Engineering, Computer Science, Business Management, Mathematics, Information Technology, Computer Engineering, or Information Sciences preferred, or equivalent experience\nExperience in an agile environment strongly preferred\nWould prefer experience/proficiency in each of the following…\nJira\nISPW/Topaz\nAgile Methodology\nLife Insurance experience\nCertifications & Licenses\nRelevant certification is a plus\nKnowledge, Skills & Abilities\nExpert ability to:\nWork across multiple environments including cloud and on-premises, and multiple operating systems\nUse modern web development technologies and techniques (e.g., HTML5, CSS, Java Script, etc.)\nPerform design (e.g., prototype, user interface (UI) design, user experience (UX) design, interaction design)\nDevelop solutions for both mobile and desktop\nCollaborate with both business and IT stakeholders and develop constructive working relationships with team and non-team members\nUse judgment to form conclusions that may challenge conventional wisdom\nConsistently apply original thinking to produce new ideas and innovate\nExpert understanding of:\nHow components throughout the technology “stack” interact\nFront and back-end programming languages/tools\nExpert knowledge of:\nContinuous integration / continuous delivery (CI/CD), Agile, and automated deployment best practices\nDatabases and database interaction\nCode versioning tools\nUse cases for architectural components and how to apply them\nExcellent communication skills to collaborate effectively across technical teams and business units. This position is ideal for professionals eager to leverage their legacy system expertise while embracing innovative solutions within a forward-thinking organization committed to technological excellence.\n#ILL2\nPay: $100,000.00 - $125,000.00 per year\nBenefits:\nHealth insurance\nEducation:\nBachelor's (Preferred)\nExperience:\nCOBOL: 10 years (Preferred)\nMainframe development: 10 years (Preferred)\nEasytrieve : 9 years (Preferred)\nJCL: 10 years (Preferred)\nCICS: 10 years (Preferred)\nTSO: 10 years (Preferred)\nJira: 10 years (Preferred)\nCI/CD: 9 years (Preferred)\nAgile: 10 years (Preferred)\ninsurance environment : 1 year (Preferred)\nWork Location: In person","company":"Stl","rawCompany":"stl","city":"Bloomington","state":"IL","isRemote":false,"isActive":false,"createdAt":"2026-07-23T15:56:17.709Z","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":"15-1251.00","title":"Computer Programmers","slug":"computer-programmers"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"COBOL/Mainframe Developer (W-2 Contract)","description":"Job Overview\nWe are seeking a highly skilled COBOL/Mainframe Developer to join a local IT team.\nThis role involves designing, developing, and maintaining legacy mainframe applications primarily built in COBOL, while integrating modern technologies and architectures to ensure robust, scalable, and secure systems.\nThe ideal candidate will possess a deep understanding of mainframe environments, system architecture, and a broad spectrum of related technologies such as service-oriented architecture, solution architecture, and cloud security.\nThis position offers an exciting opportunity to work on mission-critical systems that support large-scale enterprise operations across diverse industries.\nDuties\nDevelop, test, and implement COBOL programs within mainframe environments to meet business requirements efficiently.\nMaintain and enhance existing legacy applications while ensuring system stability and performance.\nCollaborate with cross-functional teams to design system architecture solutions that incorporate ETL processes, RESTful APIs, and microservices.\nConduct system analysis and debugging to identify issues related to COBOL code, JCL (Job Control Language), or mainframe operations.\nIntegrate mainframe applications with modern platforms such as Salesforce, Pegasystems, or cloud services like AWS and Azure.\nPerform system hardening, vulnerability assessments, and implement security best practices including firewall configuration, VPN setup, and system hardening techniques.\nSupport continuous integration/continuous deployment (CI/CD) pipelines using tools such as Jenkins or Git for efficient development cycles.\nParticipate in system architecture planning involving load balancing, virtualization (VMware/ESXi), and container orchestration with Kubernetes.\nAssist in the migration of legacy systems to cloud environments while ensuring data integrity and security compliance.\nDocument technical specifications and provide training or support for end-users and junior developers.\nRequirements\nProven experience as a COBOL/Mainframe Developer with extensive knowledge of IBM z/OS or similar mainframe operating systems.\nStrong understanding of service-oriented architecture (SOA), solution architecture, and enterprise system design principles.\nProficiency in programming languages including COBOL, C++, C#, Java, Python, and scripting languages such as Bash or Shell Scripting.\nFamiliarity with database management systems like IBM DB2, Oracle, PostgreSQL, MySQL, or NoSQL databases; experience with SQL/T-SQL is essential.\nKnowledge of IT infrastructure components including load balancing, firewalls, DNS/DHCP management, VPNs, and network security protocols.\nExperience working within Agile methodologies and SDLC (Software Development Life Cycle) frameworks.\nHands-on expertise with DevOps tools such as Jenkins, Git repositories, CI/CD pipelines, and system automation tools.\nUnderstanding of modern web services including SOAP/REST APIs and integration techniques using XML/JSON formats.\nKnowledge of cloud platforms such as AWS or Azure along with virtualization technologies like VMware or ESXi.\nStrong problem-solving skills with the ability to debug complex issues across multiple layers of the technology stack.\nEducation & Experience\n10+ years of experience within mainframe development\nExperience with incident triage and troubleshooting\nMust be highly proficient in each of the following…\nCOBOL\nEasytrieve\nJCL\nCICS\nTSO\nProduction Incident Support (both batch and real-time)\nBachelor’s degree in IT Engineering, Computer Science, Business Management, Mathematics, Information Technology, Computer Engineering, or Information Sciences preferred, or equivalent experience\nExperience in an agile environment strongly preferred\nWould prefer experience/proficiency in each of the following…\nJira\nISPW/Topaz\nAgile Methodology\nLife Insurance experience\nCertifications & Licenses\nRelevant certification is a plus\nKnowledge, Skills & Abilities\nExpert ability to:\nWork across multiple environments including cloud and on-premises, and multiple operating systems\nUse modern web development technologies and techniques (e.g., HTML5, CSS, Java Script, etc.)\nPerform design (e.g., prototype, user interface (UI) design, user experience (UX) design, interaction design)\nDevelop solutions for both mobile and desktop\nCollaborate with both business and IT stakeholders and develop constructive working relationships with team and non-team members\nUse judgment to form conclusions that may challenge conventional wisdom\nConsistently apply original thinking to produce new ideas and innovate\nExpert understanding of:\nHow components throughout the technology “stack” interact\nFront and back-end programming languages/tools\nExpert knowledge of:\nContinuous integration / continuous delivery (CI/CD), Agile, and automated deployment best practices\nDatabases and database interaction\nCode versioning tools\nUse cases for architectural components and how to apply them\nExcellent communication skills to collaborate effectively across technical teams and business units. This position is ideal for professionals eager to leverage their legacy system expertise while embracing innovative solutions within a forward-thinking organization committed to technological excellence.\n#ILL2\nPay: $100,000.00 - $125,000.00 per year\nBenefits:\nHealth insurance\nEducation:\nBachelor's (Preferred)\nExperience:\nCOBOL: 10 years (Preferred)\nMainframe development: 10 years (Preferred)\nEasytrieve : 9 years (Preferred)\nJCL: 10 years (Preferred)\nCICS: 10 years (Preferred)\nTSO: 10 years (Preferred)\nJira: 10 years (Preferred)\nCI/CD: 9 years (Preferred)\nAgile: 10 years (Preferred)\ninsurance environment : 1 year (Preferred)\nWork Location: In person","datePosted":"2026-07-23T15:56:17.709Z","dateModified":"2026-07-23T15:56:17.709Z","hiringOrganization":{"@type":"Organization","name":"Stl","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Bloomington","addressRegion":"IL","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"2d2d8066165b45eabd265cd1"},"url":"https://jobsearcher.com/jobs/2d2d8066165b45eabd265cd1"}}