Yusuf Estes (born in 1944) is an American Muslim preacher and teacher who converted to Islam in 1991. He was the National Muslim Chaplain for the United States Bureau of Prisons through the 1990s. He became the Muslim Delegate to the United Nations World Peace Conference for Religious Leaders held at the U.N. in September 2000. Active in Islamic missionary work in the United States, he is often featured as guest presenter and keynote speaker at various Islamic events as well as frequently appearing on various Islamic satellite TV channels. More here. His personal site here. His GuideUS TV link here.
Please listen to his story in his own words.
Unique Muslimah's Corner 
Assalamu Alaikum!
I love Sheikh Yusuf Estes! As a matter of fact, he’s one of my favorite speakers, and I try not to miss any of his lectures whenever he’s in the UAE. I like how he’s funny, humble and soft-spoken, mashaAllah.
Wa Alikumsalam, Nadia.
Jazak Allah Khairan for visiting.
Yup, he’s really nice. I too love his way of Da’wah. Masha Allah, your lucky to here his lectures in person. I wonder if he comes to Saudi Arabia for lectures.