Koehler frequently represents families who have lost loved ones due to intentional or negligent acts. Among those cases is Kime v. City of Seattle, a wrongful death settlement that found the city responsible for enhancing the danger of the 2001 Seattle Mardi Gras. Koehler is known for her creativity, tenacity, and trial skills and she has been privileged to see laws changed because of the stories of clients whom she has represented.

Koehler is a prolific speaker and writer, an author of nationally published legal treatises, and an adjunct professor at the University of Washington School of Law. In addition to serving as president of the Washington State Trial Lawyers Association (2007–2008), she has held leadership positions in the American Association of Justice. A member of the America Board of Trial Advocates, Koehler is listed in Best Lawyers in America and is regularly listed as a Super Lawyer and a top 40 personal injury lawyer by Washington Law & Politics magazine.