The National Eye Institute (NEI) in Bethesda, MD requires a blanket annual preventative maintenance and repair contract for 39 Carl Zeiss microscopes critical to its research. The contract must cover onsite maintenance, repairs, and remote troubleshooting, as only factory-trained Zeiss engineers and proprietary parts can properly service these complex instruments. Previous third-party service was unacceptable due to untimely repairs that reduced instrument performance and scientific productivity. No specific budget amount or non-bid timeline is mentioned in the description. The location for performance of services is the NEI in Bethesda, Maryland.