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About Us

About Our Firm


We have chosen to limit our practice to tax preparation and advisory services and business and individual planning and consulting. Consequently, we do not provide many of the more traditional services expected of a Certified Public Accounting Firm such as bookkeeping services, payroll processing, audited, reviewed or compiled financial statement preparation, investment management or detailed personal financial planning. However, through our extensive network of firms with which we have long-standing relationships, we are able to coordinate and oversee the delivery of these services to our clients.

Our Mission

Our mission is to assist our clients in achieving their financial goals through thorough research, sound analysis, and quality compliance and consulting services delivered with high standards of integrity, objectivity and professionalism.

Our Team

Michael D. Weatherwax, CPA is the President and sole shareholder of Weatherwax & Associates, PC in Boulder, CO. He has a B.S. with distinction from Southern Colorado State College (now Colorado State University - Pueblo) and an MSBA from the University of Denver. He entered public accounting in June, 1968 and became a CPA in September 1969. After spending 8½ years with a national CPA firm in Denver and 6 years with a local Boulder CPA firm, Michael founded Weatherwax & Associates, PC in October 1982.

From 1973 to 2004, Michael served as a Continuing Professional Education Author and Instructor for the Colorado Society of CPAs; during which time he made several hundred CPE presentations to CPAs in over 30 states. During the 32 years that he was a CPE instructor, Michael authored 10 separate texts on such topics as real estate taxation, partnerships and corporations, ethical responsibilities in tax practice, tax deferred exchanges, passive activities, and tax updates for CPAs not in public practice. In addition to instructing the courses he authored, Michael also taught over 25 other course titles written by other authors. In 2010 Michael again took up CPE authoring and instructing with his course Ethical Responsibilities in Tax Practice.

He is a member of the Colorado Society of Certified Public Accountants where he served as its 1989-1990 President. He is the recipient of the Colorado Society of CPA’s 1997 Public Service Award for service to the community and their 2006 Distinguished Service Award for his “significant and lasting contributions to the CPA profession in Colorado and nationally”. He is also a Life Member of the American Institute of Certified Public Accountants where he served four years as a member of the Governing Council.

In 2002, he completed his second four year term as a member of the Colorado State Board of Accountancy, including two one year terms as the President of the Board. In 2006, he completed eight years service on the Board of Directors of the National Association of State Boards of Accountancy (NASBA) including one year (2004-05) as the Chairman of the Board. In 2005, Michael was named one of Accounting Today Magazine’s Top 100 Most Influential People in Accounting in the US.

He is a past Chairman of the Board (1988) of the Boulder Chamber of Commerce and a graduate of the Chamber's charter class of the Leadership Boulder Program. He is a past Chairman of the Board (1995 and 1996) of Boulder Community Hospital Foundation. He served on the Board of Directors of Boulder Community Hospital from 1999 to 2005, where he also served as Treasurer from 2001 to 2003. He recently completed a three year term on the Board of Trustees of Frasier Meadows Retirement Community. He has been a member of the Boulder Rotary Club since 1988, serving as the Club’s Secretary/Treasurer from 1999 to 2009 and Club President in 2010-11. He received the Club’s Service Above Self Award in 2006 and a Lifetime Achievement Award in 2009. In 2012 Michael was awarded Rotary District 5450’s Governor’s Award for Vocational Service and the Les Bevins Award for Outstanding Vocational Service. He was named the 2007-08 Alumnus of the Year by the School of Accountancy of the University of Denver.

He has served in various leadership roles with a number of governmental, civic and human service organizations in Boulder County and is a two-time recipient of the City of Boulder’s Community Service Award. Michael is currently a member of the Vestry (Parish Council) of St. John’s Episcopal Church in Boulder where he also serves as Treasurer and Chair of the Finance and Investment Committee. He has been listed in Who's Who in the West and Who's Who in Finance and Industry.

Michael can be contacted or 303-499-6711

William S. Rubin, CPA is Vice President and Secretary of Weatherwax & Associates, PC, positions he has held since 1996, when he merged his accounting practice into Weatherwax & Associates, PC. Bill has a BS in Business and an MS in Accounting with an emphasis in Taxation from the University of Colorado – Boulder. Bill entered public accounting in 1993 after a successful career as an artist and became a CPA in 1995.

Bill is a member of the Colorado Society of CPAs where he served as the President of the Boulder/Longmont Chapter in 2001-03 and has served on numerous committees over the past 10 years. He received the Society’s Making a Difference Award in 2010. He is also a member of the American Institute of CPAs.

Bill served for 12 years on the Board of Directors of Thistle Community Housing in Boulder, including 8 years as treasurer and 2 years as President. He served 6 years as a member of the Board of Directors of the Community Foundation Serving Boulder County, including 5 years as Treasurer. He is a past Treasurer and member of the Board of Directors of the Boulder Philharmonic Orchestra. He was a charter member of the Rotary Club of Boulder Flatirons where he served 3 years as the Club’s Treasurer. He received the Club’s first Rotarian of the Year Award in 1999. Bill transferred to the Boulder Rotary Club in 2005 and was named their Rotarian of the Year in 2011. Bill is currently serving a two year term on the Board of Directors of the Boulder Rotary Club and the liaison to the Rotary Interact Club at Boulder High School. He is a member of the Board of Directors of Rocky Mountain RYLA (Rotary Youth Leadership Award) and has enjoyed 9 years of service as a Senior Counselor at week-long RYLA (High School) and Young RYLA (8th Grade) Camps.

Bill can be contacted at or 303-499-6711.

Irene V. Smittkamp joined Weatherwax & Associates, PC as Office Manager in November 2009. Prior to joining us, Irene worked as an executive assistant for a Boulder investment firm for three years and before that worked her way up from Sales Associate to Store Administrator and Director of Training for a large Boulder department store. These followed the very successful career of raising four wonderful children to adulthood.

Irene has spent volunteer time involved with her children’s schools including serving for three years as Silent and General Auction Chair for Mayfair the major fundraising benefit for Sacred Heart of Jesus School and for two years as Chair of the Senior Class Barbeque at Boulder High School. She also volunteers in the New Born Nursery of Boulder Community Hospital.

Irene can be contacted at or 303-499-6711.