Senior Project Engineer - Roofing Systems Littleton CO JMTC | Bremen IN | Scottsboro AL | Hazleton PA | Macon GA R25_2214 Full time Who We Are Johns Manville is a leading manufacturer and marketer of premium-quality insulation and commercial roofing, along with glass fibers and nonwovens for commercial, industrial and residential applications. Our products are used in a wide variety of industries including building products, aerospace, automotive and transportation, filtration, commercial inter