Abstract: The present invention provides a cloud computing based system for compliance monitoring of vehicles and users of hydrocarbon wellsites and methods of implementing compliance monitoring service. The system includes at least one access control station located in the compliance monitored hydrocarbon wellsite and a cloud system server to manage the compliance monitoring of the hydrocarbon wellsites. The cloud system server can analyze an access code data and geolocation data received from a mobile computing device of a user, who is desiring to enter or exit a hydrocarbon wellsite or a portion of it, to authenticate the user, to determine whether the user is entering or exiting the hydrocarbon wellsite, and to identify the location of the access control station where the user entry or exit occurs.