Lawrence Mirabal was appionted to the new position of sales manager of engineering and design services for printed circuit board (PCB) fabricator Sierra Proto Express, it announced today. Mirabal, who has held sales management positions in the PCB design and engineering services industry for a number of years, will oversee services including sales and marketing for the company's alliance with CADParts & Consulting LLC, an electronic and product design services provider that recently opened an office at Sierra Proto's Sunnyvale, Calif., headquarters.