EXHIBIT 24(a) CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS We consent to the reference to our firm under the caption "Experts" in the Registration Statement on Form S-8 registering 1.5 million shares of common stock pertaining to the 1989 Employee Stock Purchase Plan of Jacobs Engineering Group Inc. and to the incorporation by reference therein of our report dated November 3, 1995, with respect to the consolidated financial statements of Jacobs Engineering Group Inc. and subsidiaries incorporated by reference in its Annual Report (Form 10-K) for the year ended September 30, 1995 and the related financial statement schedules included therein, filed with the Securities and Exchange Commission. ERNST & YOUNG LLP Los Angeles, California February 29, 1996