Early in the 1950’s Motter Electric became an official Allen-Bradley distributor expanding the company’s product offering to industrial controls.

The name was changed to "York Electrical Supply Co." in 1956 when Ben Neff and Ed Laucks Sr., former managers of Motter Electric, along with Judge Stock, an investment partner, and prominent York attorney Henry B. Leader, an investment partner, purchased the distributorship.

York Electrical Supply Co. later opened its Lancaster branch in 1959, moving to its current Manheim Pike location in 1997.

In the 1960’s sales personnel and key product lines were added to handle its business operation in south central Pennsylvania and northern Maryland. To handle the order to invoice process more efficiently, YESCO established it first computerized system putting them into a new electronic communications era.

In 1968 YESCO remodeled the York location to include a lighting showroom and addition to the building for warehouse space. By the mid 1970’s it was no longer profitable to handle so many different lighting fixtures, so the company downsized the lighting showroom. Henry Leader later bought out Judge Stock and Ed Laucks Sr.'s share of the business after they passed away.

In the early 1980’s YESCO again remodeled the York location to include additional office and sales staff and enlarged the showroom area for self-service merchandisers. With the increased activity and needed support of automation control products, a new high tech department was developed for programmable controllers, variable speed drives, and peripheral products. As added support, the high tech group provided customer training in the evenings.

Ben Neff retired as President in 1982 and Charles F. Stephenson, then Vice President, succeeded him. Ben sold his share of the business to Henry Leader who became sole owner. Since Henry did not wish to be involved in the distributorship, he left the daily operations to the management team.

As a new age of automation equipment was introduced, customers became reliant on distributor training in light programming and troubleshooting. In 1982 YESCO constructed its first technical center to offer industrial automation training. It was also the beginning of communicating with customers via fax machines.

By this time sales had doubled and existing inventories filled the warehouse to capacity. In 1986 the main distribution facility was moved from 815 N. George St., a larger facility at 4^th and Duke Streets. Next day delivery services were provided in 1987 within a 60-mile radius of the York distribution center. The York showroom was also moved to 4^th & Dukes Streets to handle more self service merchandisers and the ceiling was designed as a lighting demonstration area for customers.

As customers’ training needs increased, a dedicated training department was established to include PC training. Another dedicated personal computer training room was added to the York facility at 815 N. George Street. Both the York and Lancaster locations received another facelift for expanded office space and a reorganization of warehouse space for additional stock material. Charles Stephenson retired in September 1988 and Jeffrey G. Livingston, Vice President, became President. Also in September of that year, Henry B. Leader, sold the distributorship to the employees and an ESOP was formed.

In 1989, on its 45^th anniversary, YESCO received the York Chamber of Commerce’s Small Business of the Year Award. Early in the 1990’s the company entered into the age of internet communications with an electronic catalog order system for customers with modem capabilities. By 1995 the inside and outside sales staff had tripled from the early 1980’s in order to be more efficient at handling customers’ needs. Again the companies’ sales had doubled and two generations of computers were installed to keep pace with increased customer service demands. As the plant floor operations became more dependent on interaction with main frame systems, YESCO sought out another service for its customer base. In 1996 YESCO acquired NETVision and in 1997 began to market its network services and computer training in York and Lancaster. By this time the original ESOP debt was successfully eliminated.

The Lancaster branch could no longer handle the increased need to stock material and lacked a training facility for customers. A new Lancaster store was built in 1997 to accommodate the growing demand for industrial automation and computer software training. It also provided more space for stock material, a large showroom with self-service merchandisers and easier access for customers to pickup material. Another new industry demand was unveiled in 1997 as companies tried to cut costs and downsize their inventories. This new demand initiated another service from YESCO and was identified as the MRO division. The MRO staff handled a customer’s tool crib stock from maintaining necessary on-hand balances to placing orders to tracking material usage and provided extensive internal cost reduction to the customer.

In 1999 YESCO and NETVision employees took part in voting on the merger between YESCO and Schaedler Bros, Inc. and, by July 1, 1999, YESCO and NETVision merged with Schaedler Bros., Inc.