Marquis Who's Who is proud to endorse Robert Singer, MD, in the Southern California Edition of The Wall Street Journal

David R. Guevara Jr. serves as a complex solutions architect at Complaxion

Exta Oppong Tweneboa, PMHNP, is a distinguished expert with over 15 years of experience in psychiatric nursing and education

Marquis Who's Who is proud to endorse Avtar Singh Walia in the Florida Edition of The Wall Street Journal