Gary D. Trozzo

Mine Safety Appliances Co. LLC develops, manufactures and supplies safety products. The firm's products include self-contained breathing apparatus, gas masks, gas detection instruments, head protection, respirators, thermal imaging cameras and fall protection. Its solutions integrate multiple combinations of electronics, mechanical systems and advanced materials to ensure that users around the world remain protected in even the most hazardous of situations. The company was founded by John T. Ryan Sr. and George H. Deike Sr. on June 14, 1914 and is headquartered in Pittsburgh, PA.

MSA (Britain) Ltd. develops and manufactures products engaged in the safety and gas detection field. Its product range includes selections of Personal Protective Equipment (PPE) and Gas and Fire Detection Systems available, designed for use in a variety of industries and applications. The company was founded on June 26, 1947 and is headquartered in Devizes, the United Kingdom.

Part of MSA Safety, Inc., MSA International, Inc. is a company that manufactures safety equipment. The company is based in Pittsburgh, PA.

Part of MSA Safety, Inc., MSA Technologies & Enterprise Services GmbH is a German company that repairs data processing equipment. The company is based in Berlin, Germany. The CEOs are James Michael Daugherty, Kimberly Seaton Moore, Richard William Roda. The company was founded in 2004.