Spencer's practice focuses on catastrophic personal injury and wrongful death cases involving defective medical devices, vehicular collisions, dangerous conditions of public and private property, and medical malpractice.

Outside of his practice at Walkup, he also serves at the University of California-Berkeley Law School as a lecturer in trial advocacy. In addition to his teaching, he directs Berkeley Law's external trial competition program, and coaches three trial advocacy teams. Spencer has also provided ongoing legal education, including developing and co-chairing programs produced in conjunction with Berkeley Law, with a special focus on providing training to young attorneys. He has also co-chaired a presentation on governmental liability and design immunity.

Spencer is a co-author of Introduction to Trial Advocacy: The Elements of Trial, a pioneering all-online video lecture series that teaches aspiring trial attorneys at all levels the fundamentals of trying a case. Introduction to Trial Advocacy has been published through Trial Guides, a renowned legal publishing house, and is designed for both self-study trial advocacy learning and use in a trial advocacy course.

Before going to law school, Spencer received his B.A. from the University of Nebraska-Lincoln in 2004, graduating in the Honors Program and with Highest Distinction. He double-majored in Economics and Psychology, with a double-minor in English and Communications. While at the University of Nebraska, he also competed nationally in intercollegiate debate and mock trial.

Spencer then attended law school at Berkeley Law, receiving his J.D. in 2007. At Berkeley, Spencer was a member of the California Law Review as well as an associate editor for Ecology Law Quarterly. Academically, he won Prosser Awards in Legal Ethics and in Environmental Law.

Spencer's main interest in law school was trial advocacy, both in Berkeley Law's competitive trial advocacy program and its clinical programs. Clinically, he tried cases before Oakland's Citizen's Police Review Board. There, his responsibilities included representing people claiming violations of their constitutional rights at the hands of the Oakland Police Department. He successfully competed on several trial teams. He won the Bay Area trial competition held by the San Francisco Trial Lawyers Association. Additionally, in the National Trial Competition, his three-person team was a regional finalist, and he won two top advocate awards.

Spencer joined the Walkup firm as an associate in 2007, and practices all types of personal injury litigation in all courts within the State of California.