- Led Development of Pioneering Next-generation Lithography Technology

Public Relations Contact: Company Contact: Investor Relations Contact: Adam Mazur Dennis E. Valentine Tim Clemensen Rubenstein Public Relations Chief Financial Officer Rubenstein Investor Relations (212) 843-8073 (760) 602-3292 (212) 843-9337 amazur@rubensteinpr.com www.jmar.com tclemensen@rubensteinir.com


FOR IMMEDIATE RELEASE


JMAR FOUNDER, JOHN S. MARTINEZ TO RETIRE AS CEO,
WILL CONTINUE AS DIRECTOR


- LED DEVELOPMENT OF PIONEERING NEXT-GENERATION LITHOGRAPHY TECHNOLOGY


SAN DIEGO, CALIFORNIA (JULY 19, 2002) -- JMAR TECHNOLOGIES, INC. (NASDAQ NM: JMAR), a leading developer and supplier of precision systems for the microelectronics industry, announced today the retirement as CEO of John S. Martinez, Ph.D., its principal founder. He has served as the Company's Chairman and CEO since its formation in 1987 and will continue to serve in his current position until August 15, 2002. The Company has retained a Silicon Valley-based executive search firm to identify and evaluate qualified applicants not currently affiliated with JMAR for the position of CEO. If no such applicant is selected and available by August 16th, Joseph G. Martinez, JMAR's Senior Vice President and General Counsel has been selected by the Directors to serve as Interim CEO until a permanent CEO is elected. In anticipation of the succession, JMAR has re-scheduled its annual shareholders meeting from its usual August date to later in the year.


Commenting on his decision to retire, Dr. Martinez said, "Founding and building a world-class "advanced light" science and technology team at JMAR over these last 15 years has been a tremendously rewarding experience for me. I will miss the close working relationships that have developed within ...