Peter Diamond



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Interesting notes about Pete:
Secret talent: I'm a pretty big history buff
I'm inspired by: The accomplishments of young people everywhere
Favorite drink: Good beer

About Peter Diamond

Peter Diamond is a people-oriented attorney who was naturally drawn to family law after an extensive and diverse practice in business, real estate, estate planning, and general litigation.

"I like people. I’m interested in people’s personalities, culture, and personal histories. And I like to help people when I can. For me, family law is both intellectually stimulating and rewarding."

Pete is a highly skilled and efficient trial lawyer. He is also trained in collaborative divorce and offers this as an alternative to traditional, contested divorce litigation. His experience in business law and as a business owner makes him effective in complex property division matters, including family enterprises.

Pete is sensitive to the welfare of children during the divorce process. As a father and former court-appointed attorney for juveniles, he is gratified when children come through the divorce in sound emotional health.

"When I run into former clients and they tell me they’re doing well, and that their children are doing well, it reinforces that I did my job effectively."

Clients quickly learn that Pete is committed to their cases. He is a diligent communicator and can be relied upon to pursue all details of a case to its conclusion.

"I want people to see my character, and not just hear my words. When I say something will get done, it gets done."

Originally from Boston, Pete fell in love with Oregon while attending law school at Willamette University. He enjoys road trips, studying history, and spending time outdoors and with his family. His spouse of 25 years is a public school teacher. He is particularly proud of his two daughters, who are both involved in search and rescue with the Multnomah County Sheriff’s office.

He is admitted to practice in all Oregon State Courts, the Oregon Federal District Court, and the Tribal Court of the Confederated Tribes of the Grand Ronde Community of Oregon. He regularly appears in Multnomah County, Clackamas County, Washington County, and Columbia County.

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  • Clackamas County Bar Association, 2013–Present
  • Clackamas County Family Law Advisory Committee, 2017–Present
  • Multnomah Bar Association, Family Law Section, 2010–Present
  • Multnomah Bar Association Professionalism Committee, Former Member


  • All Oregon Trial and Appellate Courts, the Tribal Court for the Confederated Tribes of the Grand Ronde Community of Oregon, and U.S. District Court for the District of Oregon.
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  • J.D., Willamette University College of Law
  • Editor, Willamette Law Review
  • B.A., University of Colorado at Boulder
  • Best Law Firms
  • Best Lawyers
  • Super Lawyers
  • AV Preeminent
  • Avvo Rating 10.0
  • American Academy of Matrimonial Lawyers
"Thanks for all the work for our family over the past year. We’re really glad you are on our side."
"David remained very level headed and family focused throughout our proceedings. That said, I always felt my specific needs were very well ..."
"Without David and Sam, there is no way I could have made it through this exceptionally difficult time in my life. I cannot imagine two ..."
"My daughter is the sunshine of my life. I felt despair and a sense of helplessness on the day I was served. On the first appointment day ..."
"In our search for a reputable law firm to handle my sister’s divorce case, we explored our options until we found the McKinley Irvin law ..."
"My attorney was very good in and out of the courtroom. Always kept me up to date on any issues that came up and was very knowledgeable on ..."
"I would like to give my sincere appreciation to Jennifer Payseno and staff. You all stood by me no matter how trying my case got. I always ..."
"Dave, thank you very much for doing such a wonderful job. It has been a pleasure working with you."
"From start to finish, the team at McKinley Irvin took care of me and my family. I couldn’t ask for more. What happened in court was exactly ..."
"I have dealt with approximately 4 lawyers in the past from other law firms. Laura from McKinley Irvin, however, handled my case with ..."
"I can’t tell you how much I appreciate your help with my case. I know the call I got from your office was an answer to my tearful and ..."
"I am so very thankful that I chose to work with McKinley Irvin and the wonderful staff they have in place. Highly recommended!"
"A huge weight and amount of stress was lifted as soon as I hired Jamie Walker. Having her on my team was exactly the peace of mind I needed ..."
"Getting a divorce was hard enough as it is. I was nervous and just wanted to get it over with before my ex-wife thought of anything else she ..."
"[My attorney] spoke English – as oppposed to ‘legalese’. She was able to propose a number of options and alternatives for various scenarios, ..."
"Marc provided steady counsel and support through the emotional times. He kept us focused and moving forward during the meetings."
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