After high school, Reykdal attended Washington State University, graduating in 1994. He majored in social studies with minors in political science and geology. Reykdal also obtained his secondary teaching certificate at WSU. Reykdal graduated summa cum laude and as a member of the Phi Beta Kappa Honor Society.
In 1999, Reykdal became the operating budget director for the State Board for Community and Technical Colleges. In 2002, he was promoted to deputy director for administration. By 2005, the Finance Division and the Administration Division merged, and Reykdal became the deputy executive director for administration and finance.
In December 2009, Reykdal announced his run for the Washington House of Representatives.
In his run for the legislature, Reykdal was the leading Democratic vote-getter in the August primary. He faced Jason Hearn, a Lacey City Council member in the November 2010 general election. Reykdal won election to the State House with 61% of the vote. In 2012, Reykdal ran unopposed for a second term to the State House.
In the fall of 2013, Governor Jay Inslee called a special session of the legislature to adopt an $8.7 billion tax incentive package for Boeing. The session lasted 72 hours and the Boeing tax incentives were passed overwhelmingly in both the House and Senate. Reykdal was one of only 13 “no” votes in the legislature, and he later stated that the Boeing tax incentives put at risk billions of dollars for schools, higher education, and other vital services without guarantees from the company that there would be net job growth.[4]
In November 2013 Reykdal defeated Republican Steve Owens (64% to 36%) for his third term in the State House of Representatives. Reykdal successfully passed a bill to provide financial assistance to low-income students who were taking college-level credits while still in high school (HB-1546). He was also the house lead on a bill to protect student data privacy.[5]
After U.S. Representative Denny Heck's announcement that he would not seek another term in 2020, Reykdal was mentioned as a possible successor.[7] Instead, Reykdal ran for reelection, defeating Maia Espinoza by ten percentage points.
On June 12, 2023, Reykdal announced that he was running for a third term.[8]
Reykdal's wife Kim is a school guidance counselor and member of the Tumwater School Board. She was nominated as one of four finalists for 2016 national Counselor of the Year.[11]