Employed as master electricians, John D. Hatzel and Joseph Buehler worked beside Thomas Edison, in the first publicly owned and operated electric generating station (the Electrical Illuminating Company), in New York City. Soon after the completion of this first commercial electrical generating plant, Mr. Hatzel and Mr. Buehler left to start the partnership of Hatzel & Buehler, Inc.
- Established in 1884, Hatzel & Buehler, Inc. is the oldest Electrical Contractor in the United States.
- Hatzel & Buehler maintains twelve offices throughout Ohio, Michigan, West Virginia, Pennsylvania, Maryland, Delaware, New Jersey and New York.
- Hatzel & Buehler is proudly affiliated with the International Brotherhood of Electrical Workers (IBEW). With over 1,100 highly trained electricians deployed across the region, Hatzel & Buehler maintains an impeccable relationship with the IBEW.
- Hatzel & Buehler has been a member of the National Electrical Contractors Association (NECA) since 1901 and has the distinction of being the longest continuous member.