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About Us

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Who We Are
About Connelly and Associates, Inc.

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.

Our Mission
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.
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Title VI Nondiscrimination Statement

Connelly and Associates, Inc. ensures nondiscrimination in all programs and activities in accordance with Title VI of the Civil Rights Act of 1964.

If you need more information or special assistance for persons with disabilities or limited English proficiency, contact our Human Resources Department at (301) 696-8820.

Trusted Drilling Professionals for Any Ground Condition.


Get in touch now and let’s talk about your project.
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About Connelly and Associates, Inc.

Connelly and Associates, Inc. is a leading drilling contractor serving
Frederick, MD and the Mid-Atlantic region. We specialize in geotechnical and environmental drilling, sonic drilling, limited access projects, and water well and geothermal drilling.