Menjivar spent time with amateur side Cal FC during their dramatic 2012 Lamar Hunt U.S. Open Cup run which saw them defeat Kitsap Pumas, Wilmington Hammerheads and Portland Timbers before suffering a defeat to Seattle Sounders FC in the Round of 16.
February 2013, Menjivar joined the Atlanta Silverbacks of the NASL, helping the team win the 2013 Spring Championship. At the end of the entire season, he was awarded a spot on the league’s 2013 best XI.
In February 2014, after trialing with the Portland Timbers, he signed with the San Antonio Scorpions.
On April 29, 2015, Menjivar was traded to the Tampa Bay Rowdies. Menjivar’s contract with the Rowdies expired on December 16, 2015. Menjivar signed with NASL expansion team Rayo OKC on February 25, 2016. Last team was the NY Cosmos before rejoining Cal FC.