I discovered David from my good friend, Andy Levine, who has the 2nd Act Stories podcast. That episode At 63, He Joined The Peace Corps And Moved To Moldova is worth a listen.
Here is David's bio:
David Jarmul is a writer and world traveler whose blog has been read in more than 100 countries. He was the head of news and communications at Duke University for many years and held senior communications positions at the Howard Hughes Medical Institute and the National Academy of Sciences. An honors graduate of Brown University and past president of the D.C. Science Writers Association, he has also worked as an editor for an international development organization, a writer for the Voice of America, and a reporter for a business newspaper. His previous books are Headline News, Science Views and Plain Talk: Clear Communication for International Development. David has traveled throughout the world and in all 50 U.S. states. He served as a Peace Corps Volunteer in Nepal, where he met his wife, Champa, and with her in Moldova, Eastern Europe. They live in Durham, N.C.