Stanna Michelle Slater (born Jeffery Slater) became a licensed Arizona attorney in 1989.

Stanna founded the Law Office of Jeffery S. Slater in 1999 after practicing 10 years with Arizona's finest trial lawyers (handling the most complex civil cases, including disputes alleging medical malpractice).

Since its launch, the Law Office of Jeffery Slater has represented a diverse group of insurance companies, healthcare providers, corporations (publicly-traded and closely-held), estates and individuals. Stanna is recognized as "Distinguished" by Martindale - Hubbell (Attorney Peer Reviews) for professional achievements and ethics. She has received the Superb designation by the Avvo Online Directory of Attorneys.

While practicing Law, Stanna has devoted substantial time trying to advance the interests of those who identify as Transgender or Gay. Stanna currently serves as the LGBT Liaison for the City of Scottsdale, where she also serves on the Scottsdale Police Chief's Community Engagement Committee. Stanna is a former Chair of the Arizona State Bar's Committee on Sexual Orientation & Gender Identity (SOGI), where she served for six consecutive years. While on the State Bar's SOGI Committee, Stanna was appointed by the State Bar to also serve on a special Task Force commissioned to review the lawyer ethics rule, ER8.4, pertaining to unlawful bias and prejudice. Stanna has also served on the Board of Directors at one•n•ten, an Arizona nonprofit that strives to empower youth who identify as Transgender or Gay.

In 2016, Stanna was recognized by the City of Scottsdale as a Diversity Champion and by Arizona Foothills Magazine as one of the Women Who Move the Valley.

Stanna earned the Juris Doctor degree in 1989 from the University of Denver College of Law.

In law school, Stanna served on the Denver University Law Review, where her contributions included extensive published analyses on opinions rendered by the United States 10th Circuit Court of Appeals.

Before law school, Stanna studied Journalism at the University of Oklahoma and earned a Bachelor of Arts degree in 1986.

In conjunction with earning a bachelor’s degree, Stanna was commissioned in 1986 as a Second Lieutenant in the United States Army Reserve (through the Reserve Officer Training Corps at the University of Oklahoma). This followed achievements that included the award of an academic scholarship and selection as a cadet to attend the US Army's prestigious Airborne (Paratrooper) Course at Fort Benning, Georgia, where Stanna learned to parachute and earned the coveted “Silver Wings” Parachutist Badge.

Beginning in 1986, Stanna served as an officer in the US Army Reserve (USAR) for a total of 13 years, devoting three of these years specifically to Arizona by serving in the 153rd Field Artillery Brigade of the Arizona Army National Guard. While in the National Guard, Stanna achieved the rank of Captain and was awarded, among other honors, the Army Commendation Medal. After completing service to the USAR, Stanna received Honorable Discharge in 1999.