DOS performed excellent work over a very long period of time. They were extremely reliable, communicative, and hard working. I can’t say enough good things about the performance and attention to detail of his team. We will certainly hire them again for similar projects in the future.
Always does great work with research and data management!
- Sara Bendetson
They did a great job at looking up emails for my mailing list. They even addressed some emails that came back as undeliverable and made the needed edits. They only charged us for what they found. I will definitely use them again in the future.