Tim is the Regional Director of Academic Affairs for the University of Phoenix, the world's largest provider of post-secondary education, with 330,000 students. He provides academic oversight and governance in service to the Mountain Region Campuses of the University, located in the states of Arizona, Nevada, Idaho, Utah, and Montana. Dr. Dosemagen served in the United States Air Force for 7 years as a Cryptologic Analyst, studying various military and industrial entities of the Peoples Republic of China while reporting to the National Security Agency. Dosemagen was decorated with the Air Force Achievement Medal, the Joint Service Achievement Medal, and the Air Force Commendation Medal. After completing full-time government service in 1987, Dosemagen instructed Chinese Mandarin in the Kenosha Unified School District, before joining the professional service of the Boy Scouts of America where he worked for 11 years, finishing as Director of Field Service with the Northeast Illinois Council, based in Highland Park, Illinois. His service area extended from the northern suburbs of Chicago to southeastern Wisconsin, and he served over 18,000 youngsters and 4,000 adult volunteers in 375 local Scout groups.

Dosemagen then served La Leche League International's Director of Operations, and then as Director of Marketing and Funding for the American IEF Education Foundation, traveling extensively throughout East Asia, bridging the gap between U.S. educational opportunities and students from China, Taiwan and Korea. IEF has offices in Taipei, Taiwan, Washington, D.C. and Shanghai, China. He then served as a consultant to Central Michigan University's innovative College of Distance and Distributed Learning, continuing his consultancy with the Bright China Management Institute in Beijing, introducing the Dr. Peter F. Drucker E-MBA, and other programs to China. As Executive Director of ABC Child Development, Inc., an El Monte, California based youth-serving human service agency, Dosemagen led a staff of 250 with a budget of $14,000,000, in efforts to increase Project Head Start outreach to the immigrant communities of eastern Los-Angeles County.
 
Presently, Dosemagen serves as Director of Academic Affairs with the University of Phoenix's Southern Arizona Campus, instructing coursework in 30 disciplines in the Graduate School of Business and Management, the Undergraduate School of Business and Management, the College of Arts and Sciences, the College of Education, and the College of Social and Behavioral Sciences. He also serves on the Faculty of Western International University.

In addition to his B.A. in East-Asian Studies from the University of Maryland, Dosemagen holds a Masters in Human Services from Murray State University, and received his Doctorate in Education from Nova Southeastern University, Ft. Lauderdale, Florida.