From 1987 to 1994, Will Espero was an appointee of Mayor Frank Fasi. He was the executive secretary of the Neighborhood Commission in charge of Oahu's Neighborhood Boards. In December 1999, Espero was appointed to the Hawaiʻi State House of Representatives by Governor Ben Cayetano to fill the vacancy left by the resignation of then-representative Paul Oshiro. In 2002, he ran a successful campaign and was elected into the Hawaiʻi State Senate. He represented District 20, which stretched from lower Waipahu to ʻEwa Beach, where Espero resides. After the reapportionment of Hawaiʻi's districts, Espero became the senator for District 19 which now includes 'Ewa Beach, Ocean Pointe, 'Ewa by Gentry, Iroquois Point, and a portion of 'Ewa Villages. Espero had formerly served as the Vice President of the Hawaiʻi Senate. He had also served as the Majority Floor Leader and Chairman of the Committee on Public Safety, Intergovernmental and Military Affairs. He was a member of both the Committees on Transportation and International Affairs and Ways and Means.
Leadership positions
State Senator, 2000–2018
Chair, Senate Housing Committee, 2016-2018
Vice President, 2015–2016
Majority Floor Leader, 2010–2015; 2017-2018
Chair, Public Safety, Intergovernmental, and Military Affairs, 2010–2015
Co-Chair, Transportation and International Affairs
Legislation introduced
Act 094, SLH 2002 - Hawaiʻi's version of Kelsey's Law
Act 101, SLH 2012 - creates opportunities for space tourism in Hawaiʻi
Act 235, SLH 2012 - appropriates funds for an advisory group for Honouliuli Camp Site, a World War 2 internment camp on Oahu, Hawaiʻi
Act 070, SLH 2011 - designates Gold Star Family plates to the family members of fallen soldiers
Act 125, SLH 2011 - requires persons convicted of violation of privacy in 1st degree & all persons convicted of promoting prostitution in 1st degree to register as sex offenders
Act 027, SLH 2010 - requires Office of Veterans Services to ensure the burial & inurnment of veteran's remains who is without immediate surviving family members
Act 160, SLH 2009 - clarifies animal cruelty law by prohibiting the confinements & restraining of a pet animal in a cruel or inhumane manner
Act 133, SLH 2008 - creates new misdemeanor offense of harassment by impersonation
Act 164, SLH 2008 - allows the Hawaiʻi teacher standards board to suspend a teacher's license when the teacher has been convicted of sexual offenses & to initiate proceedings to permanently revoke their license
Act 127, SLH 2005 - designates the path from Halawa landing to Waipahu as the Pearl Harbor Historic Trail
On Sunday, July 21, 2013, Espero announced his candidacy campaign for the 1st Congressional District of Hawaiʻi, the seat Hawaiʻi U.S. Representative Colleen Hanabusa vacated to run against Hawaiʻi U.S. Senator Brian Schatz. In the Democratic primary, Espero lost the party nomination to Mark Takai.
2018 lieutenant gubernatorial election
On September 2017, Espero tweeted that he would run for Lieutenant Governor of Hawaii. He lost the Democratic primary to his colleague Sen. Josh Green.