A protective case for a mobile or portable electronic device is disclosed. The protective case includes a front portion and a back portion that is configured to slide into a side of the front portion to effectuate the sealing and closure of the case. The front portion is configured to cover the front face and sides of the electronic device and includes rails or protrusions on opposing sides of its internal surface. The back portion is configured to cover the back side of the electronic device and includes channels on opposing sides that are configured to be slide along the rails on the opposing sides the internal surface of the front component and thereby open and close the case. The protective case is configured to be reversibly attached to a stand module that facilitates multiple viewing/operating positions. The stand includes a base that is configured to be attached to the case, a hinged stand arm, and a slide cover that locks the hinged stand arm into various configurations that facilitate supporting the protective case and mobile device in multiple viewing/operating positions or orientations.