Abstract: Dual layer interface with a safety instrumented system (SIS) in an industrial plant. A diagnostic status aggregator having an established connection with the SIS collects and stores health and diagnostic status data from the SIS. An interface processing engine communicatively coupled to the diagnostic status aggregator and to a user device receives a new request for information relating to the SIS from the user device. A memory stores processor-executable instructions that, when executed, configure the interface processing engine for parsing the new request to identify one or more specific keywords therein associated with the requested information relating to the SIS, generating a query based on the identified keywords, retrieving, from the diagnostic status aggregator, the status data collected from the SIS responsive to the query, and providing, the status data retrieved from the diagnostic status aggregator to the user device.