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Mario Castillon Email & Phone Number
Senior Professional Quality
at
Gainwell Technologies
LinkedIn matched
✓ Verified July 2026
3 data sources
Profile completeness 86%
Current company
Role
Senior Professional Quality
Location
El Paso, Texas, United States
Company size
Who is Mario Castillon? Overview
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Quick answer
Mario Castillon is listed as Senior Professional Quality at Gainwell Technologies, a with 10057 employees, based in El Paso, Texas, United States. AeroLeads shows a matched LinkedIn profile for Mario Castillon.
Mario Castillon previously worked as Senior Software Test Engineer at Gainwell Technologies and Test Software Engineer at Dxc Technology. Mario Castillon holds Diploma Of Education, Automation Architecture from Dallas College.
Company email context
Email format at Gainwell Technologies
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Gainwell Technologies
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Profile bio
About Mario Castillon
I have a proven track record in QA Testing to deliver high-quality, scalable solutions for large-scale projects. By leveraging tools like Selenium, Java, Postman, JMeter and Manual Testing. Additionally, I bring strong skills in API testing, CI/CD management, and version control using platforms like Jenkins, Git, and Maven.Passionate about solving complex problems, I’m committed to continuous improvement and driving innovation in every project.Tools/Skills: Selenium WebDriver, Postman, JMeter, Jenkins, Maven, TestNG, HP ALM Quality Center, Jira Zephyr, Java, HTML, JavaScript, SQL, XML, JSON, Git, SVNTesting: Functional, Regression, Smoke, White Box, Black Box, UAT, System Testing
Current workplace
Mario Castillon's current company
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Gainwell Technologies
6 roles
Mario Castillon work experience
A career timeline built from the work history available for this profile.
Senior Software Test Engineer
Senior Software Testing Analyst• Led test efforts across all SDLC phases, including requirement analysis, test planning, execution, and defect documentation.• Increased claim submission efficiency by 70% by developing automation scripts using Selenium WebDriver and Java.• Designed and implemented test automation frameworks, improving overall process efficiency and reducing manual testing by 60%.• Enhanced API and load testing capabilities using Postman and JMeter, optimizing… Show more Senior Software Testing Analyst• Led test efforts across all SDLC phases, including requirement analysis, test planning, execution, and defect documentation.• Increased claim submission efficiency by 70% by developing automation scripts using Selenium WebDriver and Java.• Designed and implemented test automation frameworks, improving overall process efficiency and reducing manual testing by 60%.• Enhanced API and load testing capabilities using Postman and JMeter, optimizing performance testing for complex applications.• Utilized HP ALM and Jira for test planning, execution, and bug reporting, improving issue resolution rates.• Managed and mentored QA teams, ensuring high standards for test case creation, defect tracking, and requirements analysis. Show less
Test Software Engineer
• Managed CI/CD pipelines using Jenkins, ClearCase, and SVN to ensure smooth software deployments.• Administered version control, branch merging, and baseline changes, reducing deployment issues by 20%.• Supported integration of off-cycle changes into production branches, minimizing downtime.
Configuration Management Admin
Software configuration management, for fannie mae account, support in Clearcase/Clearquest, SVN, Unix, baseline and code migration, build/deploy management.
Jun 2012 - Feb 2016
Test Engineer
IT Software Test Engineer.• Developed and tested web applications supporting Custom Factory Integration (CFI) configurations and dynamic SOP systems for assembly instructions.• Created a Purchase Order Verification System using C#, ASP.NET, and SQL to detect invalid orders, reducing invalid orders and production delays by 40%.• Automated translation of manufacturing instructions from English to Spanish using SQL, Java, and Excel, increasing process efficiency.
Feb 2009 - Feb 2012
Software Information Developer
Batch cycle monitoring for GMAC MIC project 24x7 support.Technologies used: JCL, COBOL, Mainframe, CA-7.Application Development for Wholesale Accounting system in legacy Technologies. Subject matter expert of Wholesale Accounting system in which I served as responsible for its enhancements maintenance and supervision, achieving in a year a 75% reduction on system abendsand general failures.Technologies used: JCL, COBOL, Mainframe, CA-7, DB2.
Feb 2004 - Feb 2009
Team & coworkers
Colleagues at Gainwell Technologies
Other employees you can reach at gainwelltechnologies.com. View company contacts for 10057 employees →
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Sameera Nandan Ananta
Colleague at Gainwell TechnologiesBengaluru, Karnataka, India
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Vandana Upadhyay
Colleague at Gainwell TechnologiesDallas-Fort Worth Metroplex, United States
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Shelby Burkhart-Long
Colleague at Gainwell TechnologiesLancaster County, Pennsylvania, United States
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Lee Curry
Colleague at Gainwell TechnologiesEl Paso, Texas, United States
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Michael Sieber
Colleague at Gainwell TechnologiesDowners Grove, Illinois, United States
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Mytrinh Nguyen
Colleague at Gainwell TechnologiesSan Jose, California, United States
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Ray Vincent
Colleague at Gainwell TechnologiesLocust Grove, Georgia, United States
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Micah Boswell
Colleague at Gainwell TechnologiesUnited States
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Erin Matthews
Colleague at Gainwell TechnologiesArlington, Texas, United States
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Kamal Twayana
Colleague at Gainwell TechnologiesFranklin, Tennessee, United States
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Sameera Nandan Ananta
Colleague at Gainwell TechnologiesBengaluru, Karnataka, India
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VU
Vandana Upadhyay
Colleague at Gainwell TechnologiesDallas-Fort Worth Metroplex, United States
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SB
Shelby Burkhart-Long
Colleague at Gainwell TechnologiesLancaster County, Pennsylvania, United States
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LC
Lee Curry
Colleague at Gainwell TechnologiesEl Paso, Texas, United States
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MS
Michael Sieber
Colleague at Gainwell TechnologiesDowners Grove, Illinois, United States
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MN
Mytrinh Nguyen
Colleague at Gainwell TechnologiesSan Jose, California, United States
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RV
Ray Vincent
Colleague at Gainwell TechnologiesLocust Grove, Georgia, United States
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MB
Micah Boswell
Colleague at Gainwell TechnologiesUnited States
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EM
Erin Matthews
Colleague at Gainwell TechnologiesArlington, Texas, United States
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KT
Kamal Twayana
Colleague at Gainwell TechnologiesFranklin, Tennessee, United States
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3 education records
Mario Castillon education
Diploma Of Education, Automation Architecture
Software Engineer, Computer Software Engineering, Bachelor Degree
Uacj
Bashelor Degree In Computer Science, Computer Software Engineering
Uacj
FAQ
Frequently asked questions about Mario Castillon
Quick answers generated from the profile data available on this page.
What company does Mario Castillon work for?
Mario Castillon works for Gainwell Technologies.
What is Mario Castillon's role at Gainwell Technologies?
Mario Castillon is listed as Senior Professional Quality at Gainwell Technologies.
Where is Mario Castillon based?
Mario Castillon is based in El Paso, Texas, United States while working with Gainwell Technologies.
What companies has Mario Castillon worked for?
Mario Castillon has worked for Gainwell Technologies, Dxc Technology, Hp Enterprise Services, Foxconn, and Eds Technologies.
Who are Mario Castillon's colleagues at Gainwell Technologies?
Mario Castillon's colleagues at Gainwell Technologies include Sameera Nandan Ananta, Vandana Upadhyay, Shelby Burkhart-Long, Lee Curry, and Michael Sieber.
How can I contact Mario Castillon?
You can use AeroLeads to view verified contact signals for Mario Castillon at Gainwell Technologies, including work email, phone, and LinkedIn data when available.
What schools did Mario Castillon attend?
Mario Castillon holds Diploma Of Education, Automation Architecture from Dallas College.
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