Gregory Paul Oliveros was born and raised in the Portland area. After graduating from the Oregon College of Education in 1973, he taught in the Portland Public Schools. In 1981, he left the classroom to become an administrator with the School District. He was a specialist in the Staff Development Community Relations Office and was later an assistant to the principal of Humboldt Elementary School. Mr. Oliveros earned 2 Masters degrees in Education from Portland State University in 1981 and 1982, then went on to attend law school and graduated in 1990 at age 40.In the early part of his career, Mr. Oliveros had a sole practice. In 1996, Michael D. O'Brien was an associate to his former firm, and became his partner in 2000, now known as Oliveros & O'Brien, P.C.Mr. Oliveros has three daughters and three granddaughters. Mr. Oliveros and his wife, Gina enjoys taking short trips with his time away from the office. Mr. Oliveros is active in his church, Christ the King, and on occasion, enjoys playing a friendly game of poker.In addition to Mr. Oliveros' criminal practice, he works in the domestic relations area. The law firm of Oliveros & O'Brien has a significant practice in bankruptcy. Mr. Oliveros' interest in criminal defense work has risen over the years, and he now considers it a significant part of his practice.

Attorney At Law Attorney Joshua V. Callahan founded The Callahan Law Office in his home state of Oregon in 2014. Since then he has helped numerous clients in the Lake Oswego and Portland areas successfully attain the maximum compensation they deserve following motor vehicle, medical malpractice, and other accidents. While completing his formal education, and before opening his own practice, Joshua started a business providing trial support services as a consultant and technical expert. After supporting trial attorneys in over 50 trials statewide, Joshua knew he wanted to be a trial attorney himself. Watching and supporting some of the most experienced trial attorneys in the Portland area, including Attorney Ralph Rayburn, allowed Joshua to gain valuable legal experience unique among his peers. Drawing from this knowledge, Josh has become a successful negotiator and litigator in his own right, who fights tirelessly for the rights of his injured clients. Proud Combat Veteran, Husband & Father Joshua was born and raised in Southeast Portland. He served in the US Army as a Military Police Officer for almost eight years, during which time he was deployed overseas numerous times for combat and other important missions. Joshua then returned to the Portland area to complete his undergraduate degree and attend law school. Josh is married to his amazing wife Anne who is also an attorney in the Portland area. They are the parents of two young boys, Brady and Patrick. When he is not working diligently for his clients, Josh enjoys spending time with his family and friends as well as staying active on the golf course and the basketball court. Joshua and Anne live in the Southeast Portland area and plan to raise their boys in the same great environment they were both so lucky to grow up in as young children.

Randall (“Randy”) Wolfe, is our founding Partner. Randy earned his Bachelor’s Degree from the University of California, and received his Juris Doctorate from the University of Santa Clara, where he was honored as its “Best Oral Advocate.” He has been admitted to practice law in Oregon since 1989. He is also licensed to practice law in Washington State. He is a President’s Circle Member of the Oregon Trial Lawyer’s Association. Randy is married with four children.