Walker Made Division VP at Memorial

Annette M. Walker has been appointed senior vice president of Memorial Health Service’s MemorialCare division in Fountain Valley. She has been with Memorial for 10 years, holding positions in administration, laboratory services, human resources and quality management.

* Michael J. Lombardi has been named executive vice president of marketing and sales for Biomerica Inc. in Newport Beach. He will oversee the Internet pharmacy division sales, marketing and business development functions. Lombardi was formerly senior vice president of Beech Street Corp. in Irvine. Before that he was senior vice president of commercial marketing and sales and senior vice president of government programs with PacifiCare Health Systems.

* Daniel C. Mathisen has joined Corbin & Wertz in Irvine as principal in charge of the company’s new information technology practice. Mathisen has more than 12 years of experience in information technology. He was most recently with Anderson Consulting.

* Nina J. Leong is the new executive vice president of licensing and business development for Op (Ocean Pacific) in Irvine. Before joining the company, Leong had been a senior executive with Disney Consumer Products since 1988.

* Ronald Lyen Jr. has joined Keystone Pacific Property Management Inc. in Irvine as network support specialist. He was previously a computer specialist with Personal Optics in Fullerton.