Marking Services, Inc. (MSI) is a company that specializes in the engineering, manufacturing, and installation of pipe markers, tags, safety signs, and other asset labeling. It offers valve tags, safety tapes, switch plates, solar labels, equipment signs, stencils, etc. The company provides technical drafting, installation, and engineering services. MSI caters to a range of industries, including oil and gas, government, healthcare, marine, food, etc.