Our Team

Our success is the result of talented, dedicated and hardworking individuals working as a team.  We foster a culture and work environment which encourages open communication, mutual respect and proactive thinking.

Stan Sauerwein, CPA (ssauerwein@orspc.com)
Stan is one of the founding partners of Olson, Reyes & Sauerwein. He is a 1979 graduate of Ball State University and has practiced in Denver, since 1980. Stan’s concentration is audit and accounting and consulting, with a specialization on the manufacturing, retail, real estate and professional service industries.

Scott Olson, CPA (solson@orspc.com)
Scott is one of the founding partners of Olson, Reyes & Sauerwein. He is a 1979 graduate of Luther College and has practiced in Denver since 1981. Scott’s concentration is in business and financial advice, income tax planning and preparation, and IRS representation and negotiation.

Jeffery Reyes, CPA  (jreyes@orspc.com)
Jeff is a partner with over 19 years of experience in providing tax advisory and compliance services to business and individuals.  He has experience with clients in various industries which include financial services, manufacturing, real estate and construction contractors. Jeff earned his Bachelor of Science Degree in Accounting from Colorado Christian University.  He is a member of the American Institute of Accountants and Colorado Society of CPAs.

Garrin Sauerwein, CPA (gsauerwein@orspc.com)
Garrin is a partner and graduate of Colorado State University. He has been in public practice since 2007 when he joined the firm co-founded by his father, Stan Sauerwein.  Garrin has experience in taxation, financial reporting and auditing.

Richard Taylor, CPA (rtaylor@orspc.com)
Richard is a partner and a graduate of the University of Colorado. He has over 10 years of public accounting experience serving individuals and a wide range of small businesses on various taxation, attestation, and planning issues.

Zach Olson, EA (zolson@orspc.com)
Zach is a partner and holds a Bachelor of Science degree from Colorado State University.  He has been in public practice since 2011 when he joined the firm co-founded by his father, Scott Olson. Zach has experience in taxation, financial reporting and auditing.

Derrick Purser
Derrick graduated from the University of Idaho with a bachelor’s degree in accounting in 2009 and from the University of Denver’s Graduate Tax Program with a masters of taxation in 2010. He worked for the Internal Revenue Service as a Revenue Agent for five years and conducted tax compliance audits on individual returns, business returns, and other related returns.

Alex Dlin
Alex graduated from Fort Lewis College with a bachelor’s degree in accounting in 2017. Alex joined the team in 2017.

Brandon Book
Brandon graduated from Fort Lewis College with a bachelor’s degree in accounting in 2018. Brandon joined the team in 2018.

Dave Kohlway, CPA
Dave was a partner in the CPA firm of McEwen, Hammel & Kohlwey which merged its practice into ORS in 2008.  He has over thirty years of experience in accounting, taxation, management advisory services and peer reviews of CPA firms.  He holds a Bachelor of Science degree from the University of Wisconsin and a Masters in Business Administration and Accounting from the University of Colorado.

Bill Hammel, CPA
Bill was a partner in the firm of McEwen, Hammel & Kohlwey which merged its practice into ORS in 2008.  He has over thirty-five years of experience in accounting, tax and management advisory matters.  He holds a Bachelor of Science in Accounting from Kansas State University.

Ellie Mayer
Ellie is the Assistant to Jeff Reyes, joining the team in 2014. She is the person to contact for Jeff’s clients requesting copies of files, meetings and all other general inquires. Ellie is a Notary Public and studied Graphic Design, Communications & Media Studies at the University of Northern Colorado.

Barbara McMillan
Barbara is the Assistant to Stan Sauerwein, joining the firm in 2009. Barbara is a Notary Public and has experience with Payroll, HR, Benefits and general accounting.

Erica Mitchell
Erica joined the team in 2017 as the assistant to Scott Olson, Richard Taylor, and Zach Olson. She is the person to contact for Scott, Richard, and Zach’s clients. Erica studied Communications at the University of Colorado – Boulder.