Stir together pumpkin spice and sugar in a small bowl. Add the mixture to a plate. 

Wet the rim of a martini glass and rim with pumpkin spice sugar.

Place glass in the refrigerator until ready to use.

Add Vodka, Pumpkin Pie Infused Simple Syrup, and lemon juice to a cocktail shaker filled with ice.

Shake well. Strain into a chilled martini glass.