Manufacturing Execution System (MES) Test Lead

The Senior Test Lead will lead testing activities for Plex or other large-scale Manufacturing Execution System (MES) rollout initiatives. The role requires 8+ years of overall experience and is responsible for developing and managing the testing strategy, coordinating end-to-end testing across business and IT teams, managing defects, leading UAT, validating data conversions and integrations, and providing testing readiness assessments through go-live and hypercare. This position is onsite and based in San Diego, California.

Key Responsibilities

Create and manage the overall testing strategy, including testing approach, schedule, scope, resources, and milestones.

Develop and maintain comprehensive test scenarios and scripts covering end-to-end business processes.

Coordinate SIT, E2E, regression, and UAT testing activities across business and IT teams.

Lead defect triage, track issue resolution, escalate risks, and drive defects through closure.

Lead UAT preparation, execution, training support, and business signoff activities.

Validate converted data and test integrations between Plex, LN, Windchill, and other connected systems.

Provide testing metrics, defect trends, risks, readiness assessments, and executive status updates.

Assess overall testing completion and provide go/no-go recommendations for production readiness.

Support cutover testing, production validation, issue management, and post-go-live stabilization.

8+ years of overall professional experience.

Experience as a Senior Test Lead supporting Plex or another large-scale MES rollout project.

Strong experience developing and managing enterprise testing strategies and plans.

Experience coordinating SIT, end-to-end, regression, and UAT testing activities.

Strong experience developing end-to-end test scenarios and test scripts.

Experience with defect management, defect triage, issue resolution tracking, risk escalation, and closure.

Experience leading UAT preparation, execution, training support, and signoff activities.

Experience validating data conversion and integrations across enterprise systems.

Strong testing leadership, communication, status reporting, and stakeholder management skills.

Experience assessing go-live readiness and supporting cutover and hypercare activities.