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Mainframe Tester Jobs in Colorado (NOW HIRING)

Strength Analyst 2

Centennial, CO · On-site

$81K - $136K/yr

Unix/Linux mainframe based analysis tools * MathCad * ABAQUS * Matlab * MS office (word, excel, ppt ... Experience with static/dynamic testing and model correlation * Experience with structural ...

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Mainframe Tester information

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How much do mainframe tester jobs pay per hour?

As of Jul 20, 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.

Is mainframe testing difficult?

Mainframe testing can be complex due to the legacy systems, specialized tools, and programming languages involved. It requires attention to detail, understanding of mainframe environments, and often knowledge of testing automation and scripting. While challenging, proper training and experience can make it manageable for testers.

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.

Can mainframe be replaced by AI?

Mainframe testers work with legacy systems that often require specialized knowledge of mainframe environments, programming languages, and testing tools. While AI can assist in automating certain testing tasks and improving efficiency, it is unlikely to fully replace mainframe testers due to the complexity and critical nature of mainframe systems. Human expertise remains essential for designing tests, interpreting results, and managing system-specific issues.

Is mainframe in demand?

Mainframe testing remains in demand due to the continued use of legacy systems in industries like finance and government. Skilled testers with knowledge of mainframe environments, COBOL, and testing tools are sought after to ensure system reliability and security.

How to be a mainframe tester?

To become a mainframe tester, you should have a strong understanding of mainframe environments, including COBOL, JCL, and DB2, along with experience in software testing and quality assurance. Gaining certifications such as IBM Certified Mainframe Application Developer can enhance your credentials, and familiarity with testing tools like CA Test Data Manager or IBM Rational Test Workbench is beneficial. Developing skills in scripting, debugging, and working within mainframe operating systems is essential for success in this role.
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:
Infographic showing various Mainframe Tester job openings in Colorado as of July 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.
Strength Analyst 2

Strength Analyst 2

United Launch Alliance

Centennial, CO • On-site

$81K - $136K/yr

Full-time

Retirement, PTO

Re-posted 3 days ago


Job description

Requisition ID: 1752
Standard Weekly Hours: 40.00
Location: ULA - Denver
Relocation: Yes- Relocation may be available
Travel Requirements: 10%
At ULA, success comes through the efforts of a strong, united team.
Thanks for your interest in United Launch Alliance, the world's most experienced and reliable space launch company! Successfully launching more than 155 consecutive missions with 100% mission success doesn't happen by accident. It's a testament to the commitment and dedication of our team of rocket scientists and support employees combined with the systems and processes we use to pull them together. As a ULA employee, you'll have the opportunity to grow in your career while working in a team-oriented culture that combines technology, innovation, ingenuity and a commitment to the extraordinary. Whether you are in college just launching your career, or, have experience and want to come work with the best rocket team in the world, our unshakable unity yields stronger solutions and better results as we carry out our mission to save lives, explore the universe, and connect the world. Our team is excited to meet you!
Job Overview & Responsibilities
As a Strength Analyst at ULA Job responsibilities include the following:
  • Performing strength, fatigue and fracture analysis of propulsion and structural components, including non-linear analysis for the Major Development Structural Analysis Team.
  • Candidate will be required to create analysis models, perform hand calculations and have an understanding of analysis best practices to provide strength inputs and recommendations for new designs and installations.
  • Candidate will be required to review and approve 3-D engineering layouts, 3-D models, designs / drawings and 2-D drawing changes for a variety of propulsion, fluid system and mechanical system components.
  • Candidate will make engineering design recommendations with consideration of thermal, mechanical and pressure loading using appropriate material properties, configurations, safety factors, etc.
  • Analysis results will be documented in strength reports.
  • Candidate will support internal peer reviews, table top reviews and formal design reviews as needed.
  • Will also need to support fast paced design/analysis cycles and be able to evaluate hardware non-conformances to support production activities.
  • The engineer must be able to work with a minimal level of mentor oversight.
  • Experience or familiarity with the following tools/software
    • NASTRAN (Static, Modal, Dynamic and Non-Linear Analysis Solutions)
    • FEMAP pre/post processor
    • NX CAD/Simulation
    • NASGRO fracture mechanics tool
    • Unix/Linux mainframe based analysis tools
    • MathCad
    • ABAQUS
    • Matlab
    • MS office (word, excel, ppt)

Required Education
Bachelor
Required Years of Experience
Minimum of 2 years of related work experience
Basic Qualifications
  • Bachelors degree in engineering or related technical frield from an accredited college or university
  • Ability to make design recommendations based on analysis results/experience
  • Proficiency with MS Office tools
  • Strong interpersonal and communication skills and the ability to work effectively in a team environment are essential
  • General understanding of materials and material properties
  • Experience with Structural Analysis (tanks, adapters, brackets)
  • Experience analyzing propulsion hardware (tubing, ducting, flex joints)
  • Experience working with cross-functional teams
  • Experience working with component suppliers and development of spec requirements
  • Understanding of fatigue/fracture analysis tools and methodology
  • Understanding of bolted joint modeling and analysis
  • Understanding of GD&T standards and principles
  • Understanding of analysis best practices and underlying assumptions
  • Understanding of basic hand calculations
  • Strong communication skills

Preferred Qualifications
  • Experience running/creating analysis automation and pre/post processing scripts using the following tools
    • Unix, Matlab, Python, Excel
  • Experience with static/dynamic testing and model correlation
  • Experience with structural optimization techniques for mass savings
  • Experience integrating with system level analysis models (coupled loads models)
  • General knowledge of fabrication methods for mechanical hardware, such as machining, welding, processing and assembly
  • Knowledge of NASGRO fracture mechanics tool and ABAQUS

Summary Salary Range (for ULA - Denver only): $81,695.00 - $136,159.00
Please note that the salary information shown above is a general guideline only. Salaries are based upon a candidate's experience and qualifications, as well as internal equity, market and business considerations. Employees may be eligible for a discretionary annual bonus in addition to base pay.
What makes ULA different?
Because we understand launch success comes through the collective efforts of a team, we seek the best to join us. We value ethics, ingenuity, engagement and professional development for employees at all levels.
We offer our employees competitive pay and benefits including:
  • 401(k) match plus an additional employer contribution
  • Discretionary annual incentive bonus for eligible employees
  • Generous paid time off
  • Flexible work environments

Additionally, most salaried ULA team members work a "9/80 schedule," meaning they enjoy every other Friday off.
Benefits and work schedules may vary for union-represented hourly positions and are described in the applicable collective bargaining agreement.
The application period for the job is estimated to be 20 days from the job posting date. However, this timeline may be shortened or extended depending on business needs and the availability of qualified candidates.
Security Clearance / International Traffic In Arms Regulations (ITAR). This position requires use of information which is subject to the International Traffic In Arms Regulations (ITAR). Therefore, all applicants must be U.S. Persons as defined in ITAR 22 CFR 120.62 (e.g., U.S. Citizen, Lawful Permanent Resident (Green Card holder) or protected individual. See 8 U.S.C. 1101(a)(20) and 8 U.S.C. 1324b(a)(3) for additional information).
ULA is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment.
ULA is a participant in the federal E-Verify Program. Posters in PDF format pertaining to this program can be accessed by clicking on the links identified below. E-Verify Participation poster (English / Spanish) and Right to Work Poster (English / Spanish).
Colorado Equal Pay for Equal Work Act requires covered employees to follow a post selection notification process. A hired candidate may opt out of this process by notifying the hiring manager in writing at the time the offer is accepted