Hatzel & Buehler began working at the GlaxoSmithKline Upper Providence site outside of Collegeville, Pennsylvania, in 2002, when they were awarded the Building 12 Lab Automation Project. Since 2002, Hatzel & Buehler continues to provide general maintenance support to the onsite electricians at the Upper Providence site, but has also expanded its relationship to include work at the Upper Merion GlaxoSmithKline Facility. Hatzel & Buehler continues to work for GlaxoSmithKline on multiple large scale projects.