Abstract: A work and resource data management system, for example for managing security officers in the field, uses a blockchain data structure providing a fully immutable and cryptographically secured system, instead of a traditional database structure. Separate chains of blocks can be used for different actors, parties or resources while linking data between the various blockchains to provide a connected data structure related to each work item. The improved system may allow for being temporarily disconnected, any part of the system may branch off to an asynchronous state while disconnected and resynchronize when connection to the network is re-established. As blocks can be added and not deleted, a full history of every action that happened in the system can be retained.