Meet the Career Development Team

Career Development Office
University of Arizona James E. Rogers College of Law
Robert Carroll Stubbs Suite
1201 E. Speedway, Tucson, Arizona 85721


Shannon Trebbe

Assistant Dean for Career Development and Professor of Practice

Senior Director Shannon Trebbe advises students seeking post-graduate judicial clerkships as well as Arizona Law's first-year students. Shannon utilizes her experience as a judicial law clerk and as a member of the hiring committee as a large international law firm to assist students in applying for post-graduate judicial clerkships and other legal positions. Prior to joining Arizona Law, Shannon was an appellate attorney with Steptoe & Johnson LLP, and she was a judicial law clerk for the Honorable Daniel A. Barker (now retired) of the Arizona Court of Appeals. Shannon graduated summa cum laude from Arizona Law, where she was a member of Order of the Coif, Arizona Law Review, and the ABA National Appellate Advocacy Competition moot court team. Shannon was also on the founding board of the Arizona Journal of Environmental Law and Policy, Arizona Law's environmental-law journal.

Heather Zapata

Assistant Director

Heather has joined the Career Development Office after spending over ten years at the City of Tucson Prosecutor’s Office, where she supervised attorneys, represented the City in criminal litigation matters, participated in the recruitment of new attorneys, and mentored law students participating in internships and the 38(d) program. Prior to that, Heather was a judicial law clerk for the Honorable Charles Pyle at the United States District Court for the District of Arizona. She was honored in 2013 as the Arizona Prosecuting Attorneys’ Advisory Council Misdemeanor Prosecutor of the Year, and was a nominee for the Pima County Women’s Commission Women in Government Award in 2016. Heather is a double graduate of the University of Arizona, receiving her Bachelor of Arts in Women’s Studies in 2001 and her J.D. in 2004.

Amanda Bynum

Director of Externships and Bar Success & Part-Time Professor of Practice

Amanda Bynum is a Tucson native with an undergraduate degree in political science from the University of Arizona. She is a 2009 graduate of the University of Arizona James E. Rogers College of Law, where she earned a Certificate in Criminal Law and Policy. During law school, she had practical experience as a Rule 38(d) attorney in the Criminal Defense Clinic. She was awarded the Outstanding 3L Award in 2009. Amanda was an associate attorney in a private Arizona law firm practicing criminal defense from 2010-2012 before practicing as a felony trial lawyer at the Pima County Public Defender from 2012-2017. Amanda created and developed an ongoing CLE program for the Public Defender's Office in 2016 and led the Criminal Defense Clinic from 2016-2017. Amanda is a member of the AALS Clinical Legal Education Association, and the Association of Academic Support Educators. She formerly served as a board member of the Pima County Young Lawyers Division and Arizona Attorneys for Criminal Justice, where she served as Seminar Committee Chair from 2013-2016 and co-chair until 2017. Amanda received the AACJ Presidents Commendation in both 2015 and 2017 for her work developing continuing legal education for criminal defense lawyers. She teaches Basic Trial Advocacy in the fall semester and assists in the program year-round. Amanda has been with the Career Development Office since August 2017 where she counsels students on bar success, develops bar programming and curriculum and runs the externship program.

Lissette Calderón

Director of International Student Success

Lissette Calderón advises Arizona Law’s international students. Lissette has been working with the Arizona Law community for more than a decade, and leverages her skills working with students, most recently as Registrar of the College of Law, to best position both international students and other students who are interested in international opportunities for success. Lissette has worked in the legal field for most of her career. Before coming to Arizona Law, Lissette was Judicial Assistant for the late Honorable Alfredo C. Marquez, U.S. District Court, District of Arizona. She is also a University of Arizona alumna, receiving her bachelor of arts in anthropology with a minor in environmental science in 2011 and a master of legal studies in 2018. Lissette is bilingual, speaking both Spanish and English, and also some Portuguese and French.

Shannon Walker

Assistant Director, Employer Engagement

Shannon Walker serves as Assistant Director, Employer Engagement for the Career Development Office. In her role, Shannon builds strong relationships between legal employers and the Career Development Office, acts as a liaison to bring employment opportunities to Arizona Law students, and tracks employment trends in Arizona and the southwest. As part of her duties, Shannon assists in organizing and managing all Arizona Law interview programs, the Sonoran Desert Public Sector Career Fair, as well as numerous networking events. She is a native Tucsonan and graduate of the University of Arizona, having obtained her dual bachelor’s degrees in psychology and sociology in 2013. She is currently pursuing a Master’s in Public Administration from Arizona State University.