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Hart-Frederick Consultants P.C.


Mike Hart and Douglas Frederick created Hart-Frederick Consultants in 1996 by merging two businesses, Hart Engineering and Frederick Surveying & Engineering. They have enjoyed a very successful partnership for the past eighteen years. 

In January of 2014 Douglas Frederick became President and sole owner of Hart-Frederick Consultants, P.C.
Douglas Frederick is a Licensed Professional Engineer (P.E.) and a Licensed Professional Land Surveyor (P.L.S.). Douglas has over 25 years of civil engineering experiences and served as the Johnson County Engineer from 1989-1996.

Hart-Frederick has an experienced team of Licensed Professional Engineers (P.E.), and Professional Surveyors (P.L.S.), plus senior designers, construction technicians, survey crew, certified IDOT inspectors and administrative support staff.

HFC's expertise includes years of professional engineering and consulting services to local governments and private developments and citizens. Specific work includes design, procurement, construction administration, construction observation, surveying, site development, subdivision design and review, grant applications, and planning assistance for various projects.

​Hart-Frederick Consultants has the staff and expertise to complete projects for your community and citizen needs. Our size allows for direct communication between the owner and project engineer. You will find our firm friendly, knowledgeable, straight forward and easy to work with.

We look forward to working with you in the future!


Douglas P. Frederick, P.E., P.L.S

President, Hart-Frederick Consultants P.C.