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 …
Always does great work with research and data management!
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 …
well done, thank you.
DOS has to be the best firm in this space. They are so responsive, professional and courteous. We are going to continue using DOS for other work as required. It is an outstanding firm to work with!
Fantastic company to work with. Strongly recommended
Excellent, responsive work. The contractor also fixed an error that was made rapidly at no additional cost
Great job will use again.
Very pleased with the quality and speed of the work. Will definitely use again in similar future projects