Douglas R. Henne is the Managing Partner of Isler Northwest LLC. Doug joined the firm in 1985 and became a partner in 1989. With over 30 years experience with closely-held and public businesses with multi-state activities, Doug continues to specialize in tax and business consulting for a wide range of industries. His expertise includes merger and acquisitions, manufacturing, estate, individual, and family tax planning, professional service businesses, and state and local taxation. CPAs from many other firms regularly request his assistance on complex tax issues.

Doug is Past Chair of the Oregon Society of CPAs and of the OSCPA State and Local Taxation Committee. With that group he has for many years assisted in the Oregon legislature's passage of tax rules, and is regularly asked to testify before the Oregon Legislature on many tax topics. Doug is a member of the American Institute of CPAs and has served as a member of the Institute’s governing council. He is also a member of the Estate Planning Council of Portland.

He also currently sits on the City of Portland Business License Tax Appeals Board and is a member of the Oregon Council of Revenue Forecasters. He has been a mentor in the OSCPA and Portland State University mentor programs and is a member of the University of Oregon Accounting Circle.