1945
Is born in San Diego, California, to Donald E. and Susan Mary Barker.
1962
Is a research scientist at the U.S. Navy’s Naval Undersea Warfare Center until 1970.
1967
Earns a Bachelor of Science in physics, with honors, from Harvey Mudd College.
1969
Graduates from the California Institute of Technology with a Master of Science in engineering science.
1972
Earns a Doctor of Philosophy in engineering from the California Institute of Technology.
1973
Serves as an assistant and associate professor of mechanical engineering at the University of California Los Angeles until 1979.
1981
Receives a Doctor of Medicine from the University of Miami School of Medicine.
1982
Completes an internship in general surgery with the University of California San Diego.
1984
Completes his residency in anesthesiology at the University of California San Diego and becomes chief resident at the institution.
1984
Becomes an assistant professor of anesthesiology at the University of California Irvine.
1985
Receives a medical license in California and becomes a diplomate of the American Board of Anesthesiology.
1992
Serves as full professor and chairman of the department of anesthesiology at the University of California Irvine until 1995.
1995
Is professor of anesthesiology and aerospace engineering and department chair at the University of Arizona College of Medicine until 2013.
1996
Serves as the director of perioperative services at the university medical center until 2000.
2002
Serves as the section editor for technology on the journal Anesthesia & Analgesia until 2006.
2002
Is president of the Society of Academic Associations of Anesthesiology and Perioperative Medicine until 2003.
2013
Is a professor emeritus of anesthesiology and aerospace engineering at the University of Arizona College of Medicine through today.
2013
Works as a consultant and the chief science officer for Masimo Corp. through today.
2015
Becomes a member of the board of directors for the Society for Technology in Anesthesia through today.
2016
Is a member of the board of directors for the Patient Safety Movement Foundation through today.