The purpose of Theta Tau is to develop and maintain a high standard of professional interest among its members and to unite them in a strong bond of fraternal fellowship.
Feeling the need for a fraternity that would foster and inculcate high ethical and professional standards among its members, a group of students representing the various branches of engineering met on October 20, 1927 drew up preliminary plans for such an organization. From the first it was decided that the organization, Pi Delta Tau, would petition Theta Tau, a national professional engineering fraternity, and with this goal in view, the principles as embodied in the constitution of Theta Tau were the frame work upon which the new organization was founded. For this reason standards were set high, membership being limited to engineering students of high personal character and promising engineering ability. Meetings have been held twice a month since the founding of the fraternity, one of those meetings being devoted to routine business and the discussion of current problems, and the other held in conjunction with some other engineering organization in the college, so that a broader view of the engineering profession may be gained. The fraternity has made it its duty to support the interest of the engineers at the University of Arizona.
The organization felt greatly encouraged by the support it had received from the engineering faculty, several of whom are members of Theta Tau. They had been very favorable towards the organization and the members felt that a successful future is in store for Pi Delta Tau.
Chi Chapter was founded on April 23, 1930 at the University of Arizona, by Captain Harold Adelbert Jimmerson and Erasmus Swann Borgquist. Since 1930 Chi Chapter has been very active on the campus, participating in many events including the Homecoming float parade, Engineer's Week, Rube Goldberg Machine contest and Spring Fling to name a few.