Sacha is a software developer in the area of research and development and requires beta application updates, and sometimes alpha releases. This would make him what type of user?

Domain 6: Security Assessment and Testing Practice Questions
Questions from the following topics are included in this domain: 
Designing and validating assessments and tests
Conducting security control testing
Collecting security process data
Analyzing test output data and generating reports 
Conducting and facilitating security audits