OpsManager is an offline-capable HTML5 web application that intends to become the one-stop portal for all key operations data for equipment rental and service companies. While the initial focus is the US$670 billion global oilfield services market, this application can also be easily adapted to companies with similar business models in e.g. the mining and other resources sectors.Managing oilfield service field operations involves manipulating countless data sets and lists that are currently mostly handled via a plethora of spreadsheets, making version control and data mining a very time consuming process. OpsManager simplifies all that via an easy-to-use interface for recording, storing and reporting all key operations data for all personnel levels, from field operator to CEO.ERP systems claim to cover the entire business process while in effect they are top-down systems that do not come anywhere near to covering the complexities of managing oilfield service operations. OpsManager starts with the premise "operations come first", it is a web portal that provides a clear and easy to use interface to capture all key operations data "directly from the coalface", i.e. the people in the field who generate the revenues.OpsManager is designed from the ground up to comply with international industry standards that govern the management of quality, health, safety and the environment. This simplifies future audits from clients and certifying agents.