PATCA PATCA, the Professional and Technical Consultants Association, is a non-profit organization created in 1975 specifically to help connect businesses and independent consultants. PATCA provides clients with an unparalleled network of outstanding professional and technical consultants, at no cost to client businesses.   Engineering Alumni Society "...to advance the service and art of engineering, to promote the general welfare of the College of Engineering of the University of California at Berkeley, and to encourage and stimulate the interest of students, graduates, and others in the College of Engineering." — Mission of the Engineering Alumni Society Founded 1955