Saxet Surface Science Staff
Gregory A. Mulhollan, Ph. D.: Owner and Principal Scientist
In October, 2002, Dr. Mulhollan founded the research, consulting and manufacturing concern Saxet Surface Science. Dr. Mulhollan has over 25 years laboratory experience including operation and design of ultra-high vacuum systems, numerous electron and optical based spectroscopies (optical magnetometry, SIMS, UPS, XPS, SEM, SEMPA, LEED, RHEED, EDX, PEEM, etc.), modeling of phenomena and processes, expertise in the design of ultra-clean environments, high field electron source design, extensive instrument interfacing experience, molecular beam epitaxy, electron and photon based electron sources and detectors, preparation of single crystal substrates and systems integration. Dr. Mulhollan received a Ph. D. (1989) and an M.A. (1987) degree in physics from William Marsh Rice University and his B.S. with high honors in physics (1984) from the University of Texas at Austin.

John Bierman: Senior Research Associate
Mr. Bierman has over 30 years of experience in research and development, cathode ray tube processes, manufacturing, lab and clean room procedures and testing. He began his involvement in the tube process/high vacuum field at Datagraphix, San Diego, CA in 1974 where he supervised the production of high resolution, high-speed cathode ray tubes for generating computer output microfilm. Mr. Bierman was responsible for extensive photocathode growth at SAIC, which included S-20 multi-alkali, KNaSb bi-alkali, CsTe and CSI phototubes. He also helped develop detectors for programs such as S-20 photocathodes for the StarLab at Lockheed Martin and CSI photocathodes for Polar Ozone and Atmospheric Monitoring for the University of Wisconsin and bi-alkali photocathodes for the Ring Laser Gyroscope for Jaycor, Missile Plume Recognition at TRW and the Hubble Space Telescope for the University of California in San Diego.

Robert Kirby, Ph. D.: Senior Scientist In April, 2008, Dr. Kirby founded his research and consulting business, Robert Kirby Consulting. Up to that time, beginning in 2004, he held the position of Head of the Surface and Materials Science Department at the SLAC National Accelerator Laboratory. Prior to that time, 1980-2004, he was a Deputy Group Leader at SLAC. He began his career at SLAC as an Engineering Physicist from 1975 to 1980. Dr. Kirby's areas of expertise include research in surface physics and surface-related materials science for forty years, expert-level knowledge of vacuum physics, x-ray photoelectron- and Auger electron spectroscopies, energy-dispersive x-ray spectrometry, secondary electron- and atomic force microscopies, electron emission, and electron optics design. Dr. Kirby received a Ph. D. (1972) and an M.S. (1969) degree in physics from the University of Wisconsin-Milwaukee and a B.S. degree in physics (1967) from Wisconsin State University.

Andrew J. Milder, Ph.D.: Research Scientist III Dr. Milder specializing in electronic prototype instrumentation development, advanced scientific computing, and high energy physics detectors, Dr. Milder has expertise in both analog and digital electronics design, with microcontroller programming, temperature and motion control, and PC software programming as his specialties. Dr. Milder has developed advanced scientific computing GPGPU capability for high speed image processing and passive rangefinding. Dr. Milder served as a Principal Scientist at Nanohmics, Inc from 2003 until 2012. Prior to that time, he was the head of electronics and measurement development at Extreme Devices, Inc from 2001 to 2003. From 1997 to 2001, he was Chief Technical Officer of National Sensor Technologies, Inc. Dr. Milder held a postdoctoral fellowship at the University of Texas at Austin from 1993 to 1997. In this position, he developed and maintained high-speed data acquisition systems in support of Experiment E871 at Brookhaven National Laboratory. Dr. Milder received a Ph.D. (1993) degree in physics from the University of Arizona for his work on the D-Zero detector and his B.S. in physics (1988) from Iowa State University.



Recent Employees
Travis and Steve have both been accepted into Texas State University this coming fall. Travis into the physics graduate program, and Steven into the Ingram School of Engineering. We enjoyed their time with us, we hope they were enriched by their experiences here, and we wish them both the best of luck in school and in their future careers.



Travis Hutchins: Research Assistant I
Mr. Hutchins received his B.S. in physics with special departmental honors from the University of Texas at Austin (2011). While at UT-Austin, he researched moderated positron beams at the Nuclear Engineering Teaching Laboratory with Dr. Manfred Fink. Mr. Hutchins is interested in nuclear physics and the space sciences.



Steve Bierman: Research Assistant
Mr. Bierman is currently attending Austin Community College earning his A.A.S. in LAN network administration. He has several years experience in electronics including fabrication, soldering and thermal devices. As well as computer repair/upgrade and troubleshooting. He has just recently gotten into the physics and data acquisition field , but is already becoming a eager and dynamic addition to the team.