Security Evolved. MAST provides professional Guarding & Maritime security services in the UK & around the globe. Making the world a safer place to live & work. We offer personal and dedicated support to our clients who range from private individuals to large multinational companies and governments. Whatever the size and nature of our clients’ business, our preparation is detailed and focused to ensure we fully understand the problems being faced and how to solve them. We are ISO 9001 and ISO 28007 accredited and also an Approved Contractor by the Security Industry Authority for our security guarding division.