Creates, maintains, and executes technical, integration, security, regression, and platform validation test plans and scripts for Workday releases, implementations, enhancements, integrations, and defect corrections; coordinates domain-specific validation with Human Resources and Finance business-line administrators. Performs triage and root-cause analysis for platform, security, integration, environment, performance, and technical configuration issues; resolves matters within assigned authority and coordinates with business-line administrators or vendors when resolution requires domain process or functional configuration changes.