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Kamptner began working for the county in 1995. He received an undergraduate degree from the University of California at Irvine and his law degree from the University of California at San Diego. He came to the Charlottesville area to work for the National Legal Research Group and then worked for Perrin Quarles Associates. Kamptner was named as deputy county attorney in 2007.  
- Web. New Albemarle County Attorney announced, Charlottesville Newsplex, April 15, 2016, retrieved April 18, 2016.
- Web. Kamptner looking forward to challenge of being Albemarle’s county attorney, Michael Bragg, Daily Progress, Lee Enterprises, April 24, 2016, retrieved April 25, 2016.
- Web. Albemarle County Announces Appointment of County Attorney, Press Release, County of Albemarle (Via Wayback Machine), April 14, 2016, retrieved September 28, 2021.