Established in 1991 as a small environmental drilling contractor with one rig, Connelly and Associates, Inc. now ranks as one of the largest geotechnical drilling firms in the Washington, D.C. and Baltimore, Maryland region. We provide services of the highest level. Our employees conduct themselves in a professional manner and enjoy their work. Our equipment is well maintained, dependable and constantly updated. Our clients regard us as partners in the process and not simply another subcontractor. We continue our success with a consistent focus on these ideals.
To continue a tradition of excellence by assertively optimizing operational best practices which initiates an enhanced employee working experience and provides added value to our clients.
National Drilling Association – Participating Member
National Ground Water Association – Certified Contractor
Licensed Construction Firm
Licensed Master Well Driller
Licensed Class A Contractor
Certified Water Well Systems Provider
Licensed Drilling Contractor
Licensed Water Well Driller
Licensed Pump Installer