- President, Mattingly Low Vision, Inc., 2007 – 2014.
- Vice President, Optelec US, 2006-2007. Vista, CA
- President, Professional Products, Optelec US, 2005-2006. Chelmsford, MA.
- Vice President, Education and Product Development, Optelec US, 2005. Chelmsford, MA.
- Chief of Product Development, Professional Products Division, Lighthouse International, 2004-2005. New York, NY.
- Vice President, Professional Products Division, Lighthouse International, 1999-2004.New York, NY.
- President and CEO, Mattingly International, Inc., 1985-1999. Escondido, CA
- Clinician, Low Vision Clinic, 1986-1989. Doctor Gary Levin, Riverside, CA
- Clinician, Low Vision Clinic, 1986-1989. Doctor's Hospital of Lakewood, CA
- Clinician, Low Vision Clinic, 1985-1989. Sharp Cabrillo Hospital Eye Center, San Diego, CA
- Clinician, Low Vision Clinic, 1985-1989. Department of Ophthalmology, Riverside Medical Clinic, CA
- Clinician, Low Vision Clinic, 1984-1989.Department of Ophthalmology, Western Medical Center, Santa Ana, CA
- Clinician, Low Vision Clinic, 1985-1988. Doctors Hanscom and Diddie, Santa Monica, CA
- Clinician, Low Vision Clinic, 1985-1989. Department of Ophthalmology, Hoag Presbyterian Hospital, Newport Beach, CA
- Clinician, Low Vision Clinic, 1985-1989. Inland Retinal Consultants, San Bernardino, CA
- Clinician, Low Vision Clinic, 1985-1989. Doctor Norman Peterson, Laguna Hills, CA
- Clinician, Low Vision Clinic, 1984- 1989. Doctor Paul Bonds, Vista, CA
- Clinician, Low Vision Clinic, 1984-1989. Doctor Paul Tornambe, Poway, CA.
- Low Vision Clinic Coordinator, 1982-1989. Department of Ophthalmology, Scripps Clinic and Research Foundation & Medical Clinics, La Jolla, CA
- Low Vision Consultant, 1982. Doctor Rasmussen, San Diego, CA
- Low Vision Consultant, 1979-1982. Doctors Nicholl, Legerton, and Cummins, Lemon Grove, CA Instructor, Blind Ski Guide Training Course, 1980-1982. San Diego State University (SDSU) Extension.
- Adjunct Professor, Orientation and Mobility for the Visually Impaired. Three terms during l977-1979. Department of Special Education, SDSU.
- Orientation and Mobility Specialist for the Visually Impaired, 1976-1979. San Diego Unified School District.
- Co-Director, Daily Living Skills Program for the Visually Impaired, Summers 1976-1978. San Diego Unified School District.
- Orientation and Mobility Specialist for the Visually Impaired, Summer 1977. San Diego Service Center for the Blind.