Geotechnical, Environmental & Geothermal Drilling in the Mid-Atlantic

Established in 1991 as a small environmental drilling contractor with one rig, Connelly and Associates, Inc. now ranks as one of the largest geotechnical and environmental drilling firms in the Washington, D.C. and Baltimore, Maryland region, operating in four states.

Our family-led team of over 55 employees includes a licensed drill crew that performs geotechnical borings and installation of monitoring wells, geothermal wells and geothermal installation. We also offer services in support of engineering and environmental consultants as well as HVAC contractors.


  • Geotechnical - Precisely collecting data without distorting results through our knowledge of local geology. Read More >
  • Environmental - Performing subsurface environmental investigations to determine existence of contamination. Read More >
  • Geothermal- Read More >


From tripod and track, to large truck and ATV- mounted drilling rigs, we have the rig and crew to complete your drilling project safely and on time.

Read more >

In Memory of
Jonathan S. Ford