Rockline Security is rated 3 out of 5 in the category security and investigations. Read and write reviews about Rockline Security. Rockline Security is a well-established, highly trusted independent security consultancy practice. Rockline primarily provides services to the high-end managed residential sector, high net worth private clients and the commercial sector. The majority of our work is for long standing Clients. Almost all new Clients come to us by recommendation and this website is mainly aimed at people who've had a recommendation and want to find out more.