Handle all the e-mail, do all the marketing and pay his lab to perform the testing. Maternal lineage tests may be given to both men and women. These look at DNA from mitochondria, the energy source of the body's cells, which both sexes inherit only from their mothers. Y chromosome kits can be used only on males to trace male lineage, for only men inherit the Y chromosome from their fathers. Women must test male ancestry through a male relative.
Results take about six weeks.
For privacy, Family Tree DNA keeps test results in a computer not connected to the Internet. In the lab, clients are identified only by a number. Greenspan is candid about the limitations. Testing is only another genealogical tool. You're not going to know if someone is your great-grand uncle using this, but you will know if he's related.