About Us

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.

Our Offices

We operate in four states and the District of Columbia from our two office locations:

  • Frederick, Maryland
  • Manassas, Virginia

Our Mission

Our mission is to provide drilling services of the highest level to the Mid-Atlantic region.  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. Our clients’ needs are more than adequately met by our professional employees and our outstanding service. We continue our success with a consistent focus on these ideals.

Our Certifications

Connelly and Associates, Inc. is a certified contractor by the National Ground Water Association and a participating member of the National Drilling Association.

Our state certifications include:

Maryland
Licensed Construction Firm
Licensed Geotechnical Well Drillers

Pennsylvania
Licensed Water Well Drillers

Virginia
Licensed Class A Contractor

West Virginia
Licensed Specialty Contractor

Our Clientele

Connelly and Associates strives to provide the highest level of service and commitment to our clients. With exceptional loyalty to our clients and their projects, we have built strong, long-standing relationships. Below is a partial list of our clientele.

AECOM
AMEC
CDM
Earth Engineering, Inc.
ECS Corporate Services, LLC
Environmental Consultants & Contractors, Inc. (ECC, Inc.)
GeoConcepts Engineering, Inc.
Geotechnical Solutions
Kleinfelder
Pennoni Associates, Inc.
Schnabel Engineering, Inc.
Specialized Engineering

Have a Project to Discuss?

With two locations and more rigs and experience than any firm in the mid-Atlantic region, we’re confident we can handle your project.


In Memory of
Jonathan S. Ford