In November 2009, Greason defeated David Poisson for the 32nd District House of Delegates seat. Greason won 57 percent of the vote despite being outspent by over $100,000. Greason was appointed to the House committees on Education, Finance, and Science and Technology. In 2011, Greason was reelected after running unopposed. In June 2013, the Democratic Party of Virginia nominated Elizabeth Miller to run against Greason in the November election. Greason won reelection 51.3% – 48.5%, a margin of 651 votes. In the Virginia House of Delegates elections, 2017, he lost to David Reid.
Legislative accomplishments
In 2011, Greason was the chief patron of legislation that guaranteed children with autism spectrum disorder would not be denied insurance coverage. The bill requires insurers to provide autism coverage for children ages 2 to 6 with a benefit cap of $35,000. The bill was signed into law by Gov. Bob McDonnell. McDonnell had originally signed a bill into law in 2011 mandating coverage, but Attorney GeneralKen Cuccinelli determined that the legislation contained imprecise language that legislators needed to correct. In 2012 Greason introduced clarifying language to rectify the situation and the bill was signed, again, by Gov. McDonnell on February 7, 2012. In 2012, Greason was appointed to serve on the influential House Appropriations Committee after just one term in the House. He was also appointed to the House Committee on General Laws. In 2015, Greason helped lead an effort in the General Assembly to allow Virginia public schools to let students who failed their end-of-year SOL tests to retake the tests. While retakes happened prior to 2015, this legislation required the Board of Education to create a uniform policy for expedited retakes on all SOL tests except for the writing test. This was bipartisan legislation that passed the General Assembly without a single no vote on the floor of either chamber.
Accusation of misconduct
In 1996, a female enlisted soldier who served as Greason's driver while both were stationed in Fort Polk, Louisiana; filed a sworn statement alleging that in 1994, Greason had exposed his genitals and appeared to be fondling himself in her presence. Charges of obscenity and disturbing the peace were filed in the United States District Court for the Western District of Louisiana, which has jurisdiction over Fort Polk. Greason denied that the event took place, calling it a "false charge." The charges were reduced and the case was delayed multiple times in 1997 and 1998 until it was eventually dismissed in 2006. The driver has never wavered from her claim.