After finishing his NCAA eligibility at William and Mary, Landry moved to Ann Arbor, Michigan and became a volunteer assistant coach for the cross country team at the University of Michigan for two years while he pursued a professional running career. His first post-collegiate breakthrough was a 28:30.07 showing in 2011 at the Payton Jordan Invitational 10,000m, his debut in the event. This success continued onto the USARC (USA Running Circuit) where he racked up four top five finishes in the next year, including a runner-up finish at the 2012 15 km Championships that would later be upgraded to a first-place finish as a result of a drug conviction of the previous winner. After the 2012 Olympic Trials, where he finished 17th following a fall in the 10,000m, Landry signed with MizunoUSA. By the end of the year he had accumulated enough points in USARC races to become the 2012 overall champion. In 2013, Landry continued to improve in the 10,000m and dipped under the 28 minute barrier for the first time.