Founded as the Armstrong Cork Company in 1860, Armstrong World Industries manufactures ceiling and wall systems for commercial and residential spaces, along with specialty architectural applications. From its headquarters in Lancaster, Pennsylvania, the company now operates 24 manufacturing facilities and employs about 4,000 people, pairing a 165-plus-year manufacturing history with a growing portfolio of architectural brands. Its work spans practical acoustical systems and energy-saving ceiling technologies designed to shape how people live, work, learn and heal.