Complex sentence: He is currently founder and principal of The Halo Agency, which supports European start-up businesses looking to enter the US market, and is best known for his contributions to the invention and development of the first E-books at the Voyager Company.
Split into simpler sentences: He is currently founder and principal of The Halo Agency, which supports European start-up businesses looking to enter the US market. He's best known for his contributions to the invention and development of the first E-books at the Voyager Company.