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Mainframe Developer With Cobol Jobs in Colorado (NOW HIRING)

National Computer Systems

COBOL Developer

Louisville, CO

$52.50 - $71/hr

Job Summary We are seeking a skilled and analytical COBOL Developer to join our Mainframe ... Familiarity with mainframe source code management tools like Endevor, ChangeMan, or Panvalet. Soft ...

Monitise

Cobol Developer

Greenwood Village, CO

$82K - $141.60K/yr

Job Title Cobol Developer About your role: You will join a technology team responsible for ... Hands-on experience in an IBM Mainframe (z/OS) environment. * Proficiency with COBOL, JCL, and DB2.

Fiserv, Inc.

Cobol Developer

Greenwood Village, CO · On-site

$82K - $141.60K/yr

Job Title Cobol Developer About your role: You will join a technology team responsible for ... Hands-on experience in an IBM Mainframe (z/OS) environment. * Proficiency with COBOL, JCL, and DB2.

Capgemini Engineering

Mainframe DevOps Engineer

Austin, CO · On-site +1

$65.20K - $169K/yr

... Mainframe DevOps Engineer / SCM (DBB/Git/IDD) Subject Matter Expert to support large‐scale ... Work hands‐on with z/OS, JCL, COBOL, PL/I, VSAM/QSAM as needed during migrations. Deliver ...

Aegon

Lead Software Engineer

Denver, CO

Summary The Lead Software Engineer mainframe and API-driven web technologies to build and support ... Focus Enterprise Developer or Visual COBOL IDE. * Familiarity with DB2 and VSAM performance ...

Transamerica

Lead Software Engineer

Denver, CO · On-site

Summary The Lead Software Engineer mainframe and API-driven web technologies to build and support ... Focus Enterprise Developer or Visual COBOL IDE. * Familiarity with DB2 and VSAM performance ...

Aegon

Lead Vantage WMA Software Engineer

Denver, CO

Summary Lead Vantage WMA Software Engineer mainframe and API-driven web technologies to build and ... Focus Enterprise Developer or Visual COBOL IDE. * Familiarity with DB2 and VSAM performance ...

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Mainframe Developer With Cobol information

What are the key skills and qualifications needed to thrive as a Mainframe Developer with COBOL, and why are they important?

To thrive as a Mainframe Developer with COBOL, you need expertise in COBOL programming, mainframe systems (such as IBM z/OS), JCL, and database management, typically supported by a degree in computer science or a related field. Familiarity with tools like TSO/ISPF, DB2, CICS, and source control systems is commonly required, and certifications in mainframe technologies can be advantageous. Strong problem-solving, attention to detail, and effective communication skills help you manage complex legacy systems and collaborate with cross-functional teams. These skills and qualifications are vital for maintaining, enhancing, and supporting critical business applications that rely on mainframe environments.

What are some common challenges faced by Mainframe Developers working with COBOL, and how can they be overcome?

Mainframe Developers working with COBOL often encounter challenges such as maintaining legacy code, integrating mainframe systems with modern technologies, and adapting to evolving business requirements. Legacy systems may lack proper documentation, making it crucial to develop strong debugging and reverse-engineering skills. Collaborating closely with business analysts and other IT teams helps ensure a clear understanding of requirements and smoother integration projects. Staying up-to-date with mainframe modernization tools and participating in knowledge-sharing sessions within your team can also help overcome these challenges and support career growth.

What are Mainframe Developers with COBOL?

Mainframe Developers with COBOL are IT professionals who specialize in developing, maintaining, and supporting applications that run on mainframe computers using the COBOL programming language. They work with legacy systems, often in industries like banking, insurance, or government, where mainframes are still prevalent due to their reliability and processing power. Their responsibilities include coding, debugging, testing, and optimizing COBOL programs, as well as integrating mainframe applications with newer technologies. Mainframe Developers also ensure the performance and security of mission-critical systems that handle large volumes of data.
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Mainframe Developer With Cobol jobs near you
Infographic showing various Mainframe Developer With Cobol job openings in Colorado as of May 2026, with employment types broken down into 94% Full Time, and 6% Contract. Highlights an 63% Physical, 31% Hybrid, and 6% Remote job distribution.
COBOL Developer

COBOL Developer

National Computer Systems

Louisville, CO

$52.50 - $71/hr

Other

Posted 8 days ago

Job description

Job Summary
We are seeking a skilled and analytical COBOL Developer to join our Mainframe Engineering team as a contractor. In this role, you will be responsible for the end-to-end development of new mainframe applications as well as the ongoing maintenance, troubleshooting, and optimization of our existing legacy systems. The ideal candidate will have deep expertise in COBOL, JCL, DB2, and CICS, with a strong ability to translate business requirements into efficient, scalable, and highly available mainframe solutions.
Key Responsibilities
Development & Enhancements:
Analyze business requirements and translate them into detailed technical specifications and design documents.
Design, code, test, and deploy new COBOL applications and modules within the mainframe environment.
Develop and modify complex JCL (Job Control Language) streams for batch processing.
Integrate COBOL programs with databases (DB2) and transaction processing systems (CICS).
Conduct thorough unit testing, integration testing, and support User Acceptance Testing (UAT).
Collaborate with cross-functional teams (QA, Business Analysts, and distributed systems teams) to ensure seamless API integrations and data flow.
Maintenance & Production Support:
Provide ongoing maintenance, support, and monitoring for existing COBOL applications.
Troubleshoot, debug, and resolve production incidents, abends, and performance bottlenecks in a timely manner.
Analyze and optimize long-running batch jobs and SQL queries to improve system performance and reduce CPU utilization.
Perform root cause analysis for recurring issues and implement permanent fixes.
Maintain and update system documentation, runbooks, and process diagrams.
Participate in disaster recovery planning, testing, and execution.
Required Qualifications & Skills
Technical Skills:
Languages: Strong proficiency in COBOL and JCL.
Databases & File Management: Hands-on experience with DB2 (including complex SQL) and VSAM.
Transaction Processing: Experience with CICS for online transaction processing (OLTP).
Environment & Utilities: Proficient in TSO/ISPF, SDSF, and standard IBM utilities (e.g., IDCAMS, SORT, IEBCOPY).
Debugging & Monitoring: Experience with troubleshooting tools such as Xpediter, Abend-AID, File-AID, or Strobe.
Version Control: Familiarity with mainframe source code management tools like Endevor, ChangeMan, or Panvalet.
Soft Skills:
Strong analytical and problem-solving abilities.
Excellent written and verbal communication skills, with the ability to explain complex technical issues to non-technical stakeholders.
Ability to work independently as well as collaboratively in a team environment.
Detail-oriented with a strong focus on code quality and system reliability.

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