In his first bid for public office, Humason was elected on November 5, 2002 with 63% of the vote and was re-elected in 2004, 2006, 2008, 2010, and 2012. He resigned on November 20, 2013 after he was elected to the State Senate.
Humason's committee assignments were as follows.
186th General Court (2009–2011)
Joint Committee on Consumer Protection and Professional Licensure
Joint Committee on Higher Education
Joint Committee on Public Health
Joint Committee on Transportation
Joint Committee on Economic Development and Emerging Technologies
187th General Court (2011–2013)
Joint Committee on Consumer Protection and Professional Licensure
Joint Committee on Rules
Committee on Rules
188th General Court (2013–2015)
Joint Committee on Consumer Protection and Professional Licensure
Joint Committee on Economic Development and Emerging Technologies
189th General Court (2015–2017)
Joint Committee on Children, Families and Persons with Disabilities
Joint Committee on Public Service
Joint Committee on Veterans and Federal Affairs
Joint Committee on Ways and Means
Committee on Intergovernmental Affairs
Committee on Bonding, Capital Expenditures and State Assets
Committee on Ways and Means
Special Committee to Improve Government
Massachusetts Senate
On August 9, 2013, incumbent State Senator Michael Knapik resigned to become Executive Director of Advancement at Westfield State University. Humason defeated Michael Franco in the Republican primary on October 8 and defeated Democratic opponent David K. Bartley 53%-47%.[4][5] A few weeks later, Humason was named as the new Senate Minority Whip by Senate Minority Leader Bruce Tarr. As Minority Whip, Humason worked to coordinate votes within the Senate Republican Caucus and assist the Minority Leader in developing policy.[6] He submitted his letter of resignation to Massachusetts SenatePresidentKaren Spilka on December 4 upon being elected Mayor of Westfield. A special election was scheduled for March 31, 2020, but was delayed by the COVID-19 pandemic until May 16;[7] it was won by Representative John Velis, who previously won the 2014 special election to succeed Humason in the House.[8]
During his tenure in the Senate, Humason's committee assignments were as follows:
188th General Court (2013–2014)
Joint Committee on Children, Families and Persons with Disabilities
Joint Committee on Consumer Protection and Professional Licensure
Joint Committee on Public Health
Joint Committee on Public Service
Joint Committee on Revenue
Joint Committee on Telecommunications, Utilities and Energy
Joint Committee on Veterans and Federal Affairs
Joint Committee on Ways and Means
Committee on Ways and Means
Committee on Bonding, Capital Expenditures and State Assets
189th General Court (2015–2016)
Joint Committee on Children, Families and Persons with Disabilities
Joint Committee on Education
Joint Committee on Public Service
Joint Committee on Veterans and Federal Affairs
Committee on Intergovernmental Affairs
Committee on Bonding, Capital Expenditures and State Assets
Committee on Ways and Means
190th General Court (2017–2018)
Joint Committee on Rules
Joint Committee on Children, Families and Persons with Disabilities
Joint Committee on Public Service
Joint Committee on Transportation
Joint Committee on Veterans and Federal Affairs
Joint Committee on Ways and Means
Special Committee to Review the Sexual Harassment Policies and Procedures
Committee on Bonding, Capital Expenditures and State Assets
Committee on Intergovernmental Affairs
Committee on Rules
Committee on Ways and Means
191st General Court (2019–2020)
Joint Committee on Children, Families and Persons with Disabilities
Joint Committee on Public Health
Joint Committee on Public Service
Joint Committee on Veterans and Federal Affairs
Joint Committee on Ways and Means
Committee on Bonding, Capital Expenditures and State Assets (Ranking Member)
In January 2019, two-term incumbent Mayor Brian P. Sullivan announced he would not seek re-election.[12] On March 21, Humason ran for mayor against Michael McCabe, a 34-year captain of the Westfield Police Department.[13][14] Humason narrowly defeated McCabe in a close race, winning 4,983 votes while McCabe received 4,886. Neither side declared victory as the results were within the margin of error, but McCabe chose not to seek a recount and conceded.[15] He ran for re-election to a second term in 2021, but lost to McCabe in a rematch.[16]
Town administrator of Chester
After his tenure as Mayor of Westfield ended, Humason was chosen by the Chesterselectboard to be the next town administrator.[17]