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Mainframe Tester Jobs in Colorado (NOW HIRING)

Teradata

Sr. Mainframe Application Developer

Denver, CO · On-site

$50.50 - $64.75/hr

Develop and maintain JCL and REXX scripts for build automation, testing, and performance validation ... Solid understanding of mainframe security models (RACF, Top Secret, ACF2) * Ability to troubleshoot ...

JConnect Infotech

Mainframe Developer

Littleton, CO · On-site

$49 - $63/hr

Mainframe Developer Location: MN /Denver, CO /Chicago, IL/SFO/Dallas, TX/Atlanta, GA/Santa Clara ... testing methodologies • Experience working in large transaction-based systems • Experience ...

krg technology inc

Test Engineer

Denver, CO · On-site

Company Description Sevagan M sevagan at krgtech com ph-661-367-8000 Extn-513 Manual Testing of Web Service using REST / SOAP Telecom domain with TIBCO, SQL, Mainframe JavaScript / Java / Python - to ...

Visa

Lead Software Engineer

Denver, CO · Hybrid

Lead the testing and certification processes for new DPS software and client integrations ... Participate in and coordinate on-call rotations to support 24x7 mainframe operations. * Guide ...

Stem Xpert

Database Administrator

Denver, CO

... DBMS) in a complex mainframe or network-based environment, similar in size and complexity to the client-server environment or web application, with skills in problem analysis, testing, and ...

Cornerstone HR Advantage, LLC

Sr. Accountant

Denver, CO

$76K - $95K/yr

... with mainframe accounting applications - Strong interpersonal, written and verbal communication ... We maintain a drug-free workplace and perform pre-employment substance abuse testing.

US Bank

Senior Software Engineer (Hogan API)

Englewood, CO · On-site

$121K - $159K/yr

Responsible for designing, testing, developing, operating, and maintaining products, sometimes ... Hands on Mainframe development experience with Hogan COBOL, JCL, CICS, Json and Splunk, IMS ...

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Mainframe Tester information

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$45

$73

How much do mainframe tester jobs pay per hour?

As of Jun 29, 2026, the average hourly pay for mainframe tester in Colorado is $45.75, according to ZipRecruiter salary data. Most workers in this role earn between $35.14 and $55.10 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive in the Mainframe Tester position, and why are they important?

A Mainframe Tester needs strong analytical abilities, proficiency in mainframe environments (such as IBM z/OS), and knowledge of programming languages like COBOL, JCL, and SQL, often supported by a degree in computer science or a related field. Experience with test automation tools (e.g., IBM Rational, CA tools), debugging utilities, and relevant certifications like ISTQB can be highly beneficial. Excellent problem-solving skills, attention to detail, teamwork, and effective communication help testers excel in cross-functional teams. These skills and qualities are crucial for ensuring reliability, compliance, and performance of mission-critical mainframe systems in large organizations.

What are the typical responsibilities and daily tasks of a Mainframe Tester?

Mainframe Testers are primarily responsible for designing, developing, and executing test cases on mainframe applications to ensure their accuracy and performance. On a daily basis, you might review requirements, create test data, identify defects, and work closely with developers to resolve coding issues. The role often involves collaborating with business analysts and system architects to understand the application's functionality and ensure compliance with business and technical standards. Mainframe Testers frequently use specialized testing tools and may participate in both manual and automated testing cycles. This collaborative and detail-oriented environment helps ensure high-quality and reliable mainframe systems for the organization.

What is a Mainframe Tester job?

A Mainframe Tester is responsible for testing applications running on mainframe systems to ensure their functionality, reliability, and security. They create and execute test cases, validate data processing, and identify defects in mainframe applications. They work with technologies like COBOL, JCL, DB2, and CICS to test batch and online processes. Their role is critical in industries like banking, insurance, and healthcare, where mainframes handle large-scale transaction processing. The tester collaborates with developers and business analysts to ensure the applications meet business requirements.

What are popular job titles related to Mainframe Tester jobs in Colorado? For Mainframe Tester jobs in Colorado, the most frequently searched job titles are:
What job categories do people searching Mainframe Tester jobs in Colorado look for? The top searched job categories for Mainframe Tester jobs in Colorado are:
Mainframe Tester jobs near you
Infographic showing various Mainframe Tester job openings in Colorado as of June 2026, with employment types broken down into 100% Full Time. Highlights an 83% In-person, and 17% Remote job distribution, with an average salary of $95,152 per year, or $45.7 per hour.

Mainframe Modernization Consultant

Futran Tech Solutions Pvt. Ltd.

Littleton, CO • On-site

Other

Posted 6 days ago

Job description

Mainframe Modernization Consultant

Summary Support modernization initiatives by analyzing mainframe systems and implementing migration strategies. Key Responsibilities:

  • Conduct application assessments and identify modernization opportunities.
  • Execute code conversion and integration with modern platforms.
  • Collaborate with architects and delivery teams for smooth transition.
  • Prepare technical documentation, estimate, and assist in testing phases.
  • Mentor consultants and oversee technical execution.

Required Skills:

  • Expertise in COBOL, JCL, VSAM, DB2, Assembler.
  • Knowledge of modernization frameworks and tools (Micro Focus, BluAge, Heirloom) including AI/GenAI based tooling/use case.
  • Exposure to APIs, microservices, and cloud integration (AWS, Azure, GCP).
  • Strong problem-solving and analytical skills.
  • Familiarity with DevOps, CI/CD, containerization (Docker, Kubernetes).
  • Should have executed at least one (1) mainframe modernization assessment and one (1) mainframe modernization program.
  • Strong leadership and communication skills.

Apply