Senior Mainframe Developer Jobs in Maryland (NOW HIRING)

Peraton is seeking a Senior Software Test Engineer to join our team of qualified, diverse individuals.  The ideal candidate is a senior testing professional who thrives in dynamic environments, provides leadership across Agile, Waterfall, and Hybrid methodologies, and ensures testing excellence through proactive guidance and cross-team collaboration.  

This position supports the IRS Enterprise System Testing (EST) program, which provides comprehensive testing and quality assurance services to ensure mission critical IRS applications are secure, reliable, and ready for deployment.

This position will be in Lanham, Maryland.

Day to Day Roles and Responsibilities: 

• Conduct functional and/or integration testing of multiple programs in an IBM mainframe, client/server or cloud environment.
• Proactively identify use cases for test automation within supported projects.
• Use test automation tools to execute test scripts that validate functional, technical, and performance requirements.
• Use Government or Contractor-developed documentation to construct test cases with predetermined results and test data to verify program functionality and/or interfaces through assigned systems.
• Review output to determine whether the test results fulfill the established requirements, and if necessary, notify the responsible programmers, both verbally and in writing, of errors, omissions, and inconsistencies in the programs and/or documentation.
• Coordinate test activities with project stakeholders.
• Coordinate work assignments to ensure timely and accurate completion of testing.
• Train other contractors or government personnel in use of automated testing tools.
• Lead and oversee testing activities with initiative and accountability, applying deep expertise while guiding others and rapidly adapting to new systems and domains.

Basic Qualifications:

• Bachelors degree and 8 years of experience or a Masters degree and 6 years of experience or an Associates degree and 10 years of experience or a High School diploma/equivalent and 12 years of experience 
• Must be a US Citizen or US Permanent Resident (Green card holder- must have 3 or more US residency)
• Must be able to obtain and maintain an MBI clearance.
• Demonstrated mastery in software testing, bringing deep expertise and advanced problem-solving capabilities.
• Experience providing strategic guidance on testing practices across Agile, Waterfall, and Hybrid delivery models, ensuring alignment and quality across diverse project environments.
• Experience leading and assisting other Test Engineers.
• Must have knowledge and experience working with and supporting the development of an overall test Plan and tailored test plans for each release.
• Must have experience preparing comprehensive reports on testing progress/issues and remedial action.
• Hands-on experience with Jira and Xray, familiarity with Atlassian products, version control and collaborative software such as GitHub
• Experience using test automation tools such as:

• Selenium
• UiPath
• QTP
• HP-UFT
• Rational Functional Teste

Preferred Qualifications: 

• Current active IRS MBI Clearance strongly preferred
• Experience working with the federal government
• Knowledge of current IRS tax administration software applications
• Experience with IBM Mainframe or Unisys Mainframe applications and operations
• Market knowledge of various classes of test automation tools, including low code/code free automated testing tools
• Exposure to wide automation concepts, framework & best practices from industry in automating mainframe and web applications
• Demonstrated experience in designing & implementing customized test automation frameworks as needed
• Experience with the following skills will be considered a significant plus:
• Hands on experience with technology standards such as: Java, Service Oriented Architecture/Web Services, SQL, XML, Agile Testing Methodology and the ability to proactively respond to emerging technology trends
• Utilization of Test Tools such as: Jmeter, Junit, Parasoft - LoadTest, Selenium Automated Testing, SOAPUI (free version), INFOConnect, Pegasus, UiPath
• Deep understanding of:  Databricks platform, Medallion architecture (Bronze/Silver/Gold) and PySpark dataframes
• Familiarity with Accessibility Tools such as: Freedom Scientific JAWS; ZoomText; Dragon Naturally Speaking 

Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace. The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees do the can't be done by solving the most daunting challenges facing our customers. Visit peraton.com to learn how we're keeping people around the world safe and secure.