Our Expertise

We're best at working hard for our clients: looking through every document, exploring every legal precedent, and leaving no equitable, creative, or legal stone unturned to achieve the best outcome possible. This is what we're best at. This is our expertise.

Leslie J. Olson                    Mark D. Olson


Mark began practicing family law in Seattle, Washington more than 30 years ago. Some words that mean the same thing as "thirty years" are "experienced" and "wise" and "understanding." Mark has litigated complex, high-profile cases as well as cases that are resolved without a murmur. He is at ease with multi-million dollar settlements and he continues to enjoy the satisfaction pro bono work offers. He has led clients to settle quietly, to not settle at all, and to settle for more than they thought they deserved. 

Mark has seen enough to know what works and what doesn't. He offers advice couched in experience. And his creativity in problem solving as a mediator is matched only by the level of his care and concern that each party leave the process with a new direction and new possibility. 

Mark has argued before the United State Supreme Court, sat as the Chair of the Family Law Section for the Washington State Trial Lawyer's Association, is past president of the Northwest Children's Fund, and has served on the alumni board at The Lakeside School. With his children grown, he spends his time outside the office working his third generation, family-owned farm with his wife, Leslie Olson.

THOROUGHNESS born of deep caring

155+ successfully negotiated settlements have enabled Leslie’s clients to achieve their financial goals and strengthen parenting relationships.
23 trial wins in complex trials of 5-18 days let Leslie’s clients know that they unfailingly have her best work.
Prevailing in five appeals confirms the equities Leslie’s clients achieved at trial.

For 19 years, Leslie has been motivated by the difference for good law can make in the lives of her clients. To say Leslie is driven is to suggest that the Grand Canyon is a muddy ditch. She works so hard for her clients that sometimes she ends up uncovering information that surprises everyone - even her clients. Leslie's deep understanding of the law, its short-comings and its generosity, guides her work and pushes her to always look for more. In the courtroom, she is clear and determined. In settlement, she is reasoned, collaborative, and firm. She takes the complexity of multi-million dollar trusts, businesses, and multi-country estates in stride, while she remains focused on creating the new lives her clients envision.

Leslie has received a Preeminent AV rating by Martindale Hubbell for legal ability and highest ethical standards. She is also named a 2019 SuperLawyer by SuperLawers of Thomson Reuters. She has a 10.0 rating by Avvo.com.

Leslie is chair of the Advisory Board of the U/W Bothell School of Interdisciplinary Arts and Sciences, where she works to support the global scholars program for first generation college students. She has served on the Executive Committee of Seattle Art Museum Supporters, and has judged mock trial and appellate advocacy competitions at U/W and Seattle U. She also cheers from afar her daughter, Corinne, who is pre-med at Wesleyan University. When she's not practicing law, you can find Leslie supporting her husband, Mark Olson, in his new adventure with his family farm.