A clamp assembly (100), and a mounting assembly (150), that may be used for securing a device (160) (e.g. a solar panel, Roof Mounted Displays, Satellite Dishes, Conduit and Piping, Snow-Retention System, HVAC etc.) to a raised portion of a standing seam (103) of a metal roof, panel or tile (119) building surface. The clamp assembly (100) comprising a mounting body (101) of a general block shape having a slot (102) for receiving the standing seam (103) formed in a bottom surface (136) of the mounting body (101) and top surface (137) for securing thereon and attaching the device (160) thereto. The clamp assembly (100) is configured with one or more pins (105) that may be formed in a substantially elongated cylindrical shape. The pins (105) may be configured to be received in one or more push-pin holes (107) formed in the mounting body (101), whereby the push-pin holes (107) extend to the slot (102) from a side surface (138) of push-pin holes (107), which are formed substantially orthogonal relative to the slot (102). The clamp assembly (100) includes a fastening element (109) adapted to be received in a fastener hole (111) formed adjacent the push-pin holes (107) in the side surface (138) of the mounting body (101). The fastening element (109) is configured to secure, attach and hold the clamp assembly (100) to the standing seam (103) by forcing the pins (105) against the standing seam (103) disposed in the slot (102). The clamp assembly (100) further comprises a groove (115) adapted to receive and secure a ground wire (120), cable (121) or other item advantageous for grounding of electrical components and organization. The mounting assembly (100) includes the clamp assembly (100) and a panel fastening assembly (126) comprising a device fastening element (139) adapted to be received in said attachment hole (113) for securing the device (160), one or more one or more solar caps (127) adapted to be disposed on and around the device fastening element (139) so as to mount and secure the device (160) disposed between the solar caps (127) by tightening said device fastening element (139).