Mid Atlantic BX, formerly Harrisburg Builders Exchange, was founded in 1938 by a group of contractors, suppliers and architects to facilitate the exchange of information between all segments of the construction industry.

From the beginning, the BX has been providing exceptional construction reporting services to our members. This service encompasses more than 14,000 projects reported annually, located throughout the Mid Atlantic region, including Central and Eastern Pennsylvania, Northern Maryland, Central and Southern New Jersey and Delaware. This project coverage area is a direct response to our members' requests for project information in these geographic regions.  

Members have the ability to use both a physical plan room (the last one in our region), and an online service. The online service or COOL (Construction Opportunities Online) provides 24-hour per day, 7-day per week access to blueprints, specifications, addenda, bidders lists and other pertinent bidding documents. Additionally, our members have a wide variety of other services to assist them with the development of their business, including industry specific educational training and seminars, social and networking events, discounted employee benefits and an annual Construction Buyers Guide.  

1972 the association began recognizing employees of member companies for exceptional work on construction projects through the Craftsmanship Awards Program. This unique award recognizes the skilled craftsperson responsible for the project, acknowledging that without these talented men and women, construction does not happen. To further train and promote the workforce in the construction industry, MABX began presenting Craftsmen of the Future Awards to senior students involved in vocational technical programs. Since the start of these programs, nearly 700 craftsmen have received awards for their outstanding skills and abilities.