Grassmyer is currently on staff and coaching with Gwinnett Soccer Association (GSA). Grassmyer is also involved in the Atlanta United Juniors Program and Nuno Piteira Soccer Experience. Previous to Grassmyer’s move to GSA, Grassmyer coached with Brookhaven FC (now known as UFA Metro). Grassmyer played soccer with Gwinnett Soccer Association (GSA), Olympic Development Program (ODP), Brookwood High School, Clayton State University (D2), and Jacksonville University (D1).

Accomplishments:
Oglethorpe University Men's Soccer - 2019 SAA Regular Season Champions
Oglethorpe University Men's Soccer - 2019 NCAA D3 National Tournament Appearance 
Oglethorpe University Men's Soccer - 2018 SAA Regular Season Champions
Brookhaven FC - 2019 Classic II Regular Season Champions - u14 (2005) Boy’s

Awards:

Licenses:
U.S. Soccer Federation National D License

Casillas is currently on staff and coaching with Atlanta United Academy, Atlanta United Striker/Keeper Clinics, and Atlanta United Juniors Programs. Casillas is also a goalkeeper coach for the Olympic Development Program. In 2020, Casillas finished coaching with the soccer programs at Georgia Gwinnett College and Parkview High School. Previous to Casillas’ move to Atlanta United, Casillas served as the Director of Goalkeeping at Kalonji Soccer Academy while also coaching varsity soccer with Meadowcreek High School. Casillas played soccer with Gwinnett Soccer Association (GSA), Olympic Development Program (ODP), Parkview High School, University of North Georgia (D2), and Atlanta Silverbacks. 

Accomplishments: 
Atlanta United Academy - 2019 Manchester City Nexen Cup International Supergroup Champions (U14/2005)
Georgia Gwinnett Men's Soccer - 2019 A.I.I. Conference Champions
Georgia Gwinnett Men's Soccer - 2018 A.I.I. Conference Champions
Meadowcreek High School - 2017 GHSA 7A Boy's State Champions

Awards: 
Georgia Gwinnett College Men's Soccer - 2019 Regional Staff of the Year
Georgia Gwinnett College Men's Soccer - 2018 Regional Staff of the Year

Licenses: 
U.S. Soccer Federation National D License