Perform basic troubleshooting, installation, and repair of carpentry, masonry, painting, siding, flooring, windows, doors, drywall, furniture, commercial roofing systems, minor low-voltage electrical work, and other related systems under the close guidance of senior technicians and supervisors. About JAX: The Jackson Laboratory is an independent, nonprofit biomedical research institution with a National Cancer Institute-designated Cancer Center and nearly 3,000 employees in locations across the United States (Maine, Connecticut, California), Japan and China.