McMillen Engineering Inc. is a full service civil engineering and land surveying firm located in the Fayette County Business Park in Uniontown, Fayette County, Pennsylvania.  Our professional staff of

engineers, surveyors, technicians and support personnel has served the needs of public

and private sector clientele since 1977.

We are dedicated to serving the needs of our clients by offering forty years of experience to guide

our clients through their projects.

Our approach to providing services for all projects involves maintaining professionalism while upholding ethical standards as we look to the future with the goal of being among the leaders in our profession.  

We aim to exceed our clients’ expectations by focusing on being proactive and responsive to

their needs. This includes delivering projects on-time and on budget.  It is our goal to offer

engineering solutions with a strong commitment to excellence for every project.


“It is the mission of McMillen Engineering, Inc. to contribute toward the advancement of the civil engineering and land surveying fields by providing quality engineering, surveying and technical services to our clients in an efficient manner while promoting a work environment that offers opportunities for our employees to thrive both professionally and personally.”


Serving the public and private sector clientele since 1977, McMillen Engineering, Inc. has a solid working and respectable relationship with various local, state, and federal agencies and departments.


This allows us to become “your voice” when working through the planning and permitting process. Over the years, regulations at the municipal and county levels began to interconnect with basic land survey and

land development. As a result, we

expanded our professional services to

meet the ever expanding regulations

and needs of our clients.


Local and county governments are confronted with challenges and opportunities as well. Proper planning with professionals is critical to assure the best interest of the client, county, municipality, and/or community.


Our goal is to accomplish our clients’

projects within the laws and regulations,

thus providing a benefit to the project

and community.



Since no two projects are the same, we begin each by understanding the purpose and priorities as well as the regulations

governing the project.


Based on our experience, we develop a unique solution to fit our clients’ needs

and schedules.


We are dedicated and committed to

our client.


Our approach to each project involves gaining a thorough understanding of our clients’ needs and providing a comprehensive plan to meet those needs. It is important to us that our clients are aware of all project requirements and are abreast of each phase throughout the project.


We ensure that they are involved in every step of the process – planning, design, permitting and construction and are informed of any known challenges along the way.




Terry E. McMillen, Sr. founded McMillen Engineering Inc. in 1977. It was a rather humble beginning as Terry and his wife, Denise, began by converting a portion of the family room in their home into office space. The early years required long days, a lot of work and dedication as the company grew steadily.

They soon realized the need for an office outside of their home, and moved into their first ‘official’ office in Hopwood, Pennsylvania. They stayed at this location for a few years, then  moved to the Hopwood Center for more office space. The company’s continual growth led to the construction of a new office building in the Fayette County Business Park on Wayland Smith Drive, just west of Uniontown. It was their 25th year in business and it was a great way to begin the second twenty-five years.

Since 1977, McMillen Engineering Inc. has provided a wide spectrum of civil engineering, but the consistent focus from the first project at Todd Farm until today has been land development. The initial projects were a variety of residential developments followed by commercial/light industrial projects and then large scale retail developments. As the needs and opportunities of society changed, they expanded  services to include infrastructure (water and sewer), design of sewage treatment plants, sewerage collection and water distribution systems, structural design, environmental engineering, and traffic engineering.

A large part of their success has been the flexibility to first identify needs and then to prepare ourselves to meet those emerging needs. McMillen Engineering Inc. has been and remains committed to becoming well-versed in changes to legislation, regulations and permitting requirements to provide the most up-to-date conditions to clients.

They firmly believe in giving back to their community and have remained consistent in that effort. They encourage their staff to be involved in their communities and volunteer with local organizations. They believe that the sum of their contributions must exceed their rewards. In 2001 McMillen Engineering Inc. was named “Business of the Year” by the Fayette Chamber of Commerce for “…commitment to the local community and support of the Chamber.”

Photo: Terry McMillen, Sr. and his wife, Denise, at the ground breaking of the McMillen Engineering, Inc. building on December 7, 2001.

Read more about

The History of MEI

115 Wayland Smith Drive, Uniontown, PA 15401          |          724.439.8110          |

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