Electrical Wholesalers, a division of US Electrical Services (Stoughton, Mass.): Dennis L. Cook has joined the company as vice president of business development. Cook is an industry veteran with more than 30 years of experience. Most recently he was president of Bennett Electric in Quincy, Mass. In his new role, Cook will focus on continuing the rapid growth of the EW business in upper New England. EW has over the last 10 months opened nine new locations in the greater Boston area, New Hampshire and Rhode Island. In January of this year the company also opened a new 150,000-square-foot Central Distribution Center to service its growing business in the region.