[2] As of 2022, Romer is the CEO of Project Canary, an independent certification organization that measures, tracks, and delivers ESG data across the energy value chain.

Previously he worked as a financial consultant focusing on biomass energy plants and transit development projects such as Denver Union Station.

[6] In late 2008, Romer left his position at JPMorgan Chase to work with the Knowledge is Power Program, a Denver network of charter schools.

Romer faced two other candidates for the Democratic Party nomination for the state senate — community activist Jennifer Mello and Rep. Fran Coleman.

[17] During the 2007 legislative session, Romer introduced a proposal to sell operations of the Colorado Lottery to a private firm in order to raise funds for public schools.

[18] The proposal would have been referred to Colorado voters in a statewide ballot measure, and would have used the proceeds from the sale to endow a trust fund to support college scholarships, public schools, state parks, and veteran's services.

[19] After facing criticism on legal grounds, and from Governor Bill Ritter, who had offered a competing proposal for school funding, Romer pulled the measure from consideration.

Garnering support largely from Republicans, the measure passed the state senate,[22] but was voted down in a house committee due to concern over mandating requirements upon local school districts.

[25] Although Romer made a number of proposals to amend the state budget, only one — a requirement that private prison operators provide information on cost breakdowns — was adopted.

[26] Following the regular session, Romer served on the legislature's interim committee on allocation of severance tax and federal mineral lease revenues.

"[29] Romer proceeded to create a website using Google Groups[30] to solicit public comment and proposals; he later introduced a bill based in part of suggestions received online.

[50] A bill introduced by Romer to allow in-state tuition to immigrant children, after being amended to become effective upon passage of the federal DREAM Act, failed in the Senate.