Position Overview: Senior Process Manufacturing Engineer provides technical leadership and serves as a trusted subject matter expert improving the equipment, systems, and technologies supporting fiberglass mat, furnace, and spunbond manufacturing across multiple JM sites. Johns Manville (JM), a Berkshire Hathaway company, is a global leader in insulation, commercial roofing, glass fibers, and nonwovens supporting industries such as aerospace, automotive, building products, filtration, transportation, and wind energy in over 80 countries.