K.G. Johnson, Inc. is a mechanical contracting company incorporated 1984 in the state of Maryland. Our qualified corporate management team offers over 160 years of combined experience. Our field technicians are the best in the business. They do the job right the first time. Our technicians are all licensed, experienced and extremely qualified to make sure your projects are completed per schedule with the highest standard possible. We are a team that provides quality workmanship, management and service at competitive prices.