Providing solutions to meet our clients' needs.

Building on a combined 40+ years experience, Centurion provides –  


  • Airport planning solutions tailored to meet short term or long-range airport maintenance and development goals. A simple terminal area plan or a comprehensive 20-year airport master plan, we will work with you to prepare a custom plan that meet your needs.
  • Airport environmental documentation required to move your project from concept to funding and design. Compliance with the National Environmental Policy Act (NEPA) is a necessary step to obtain approval and funding, we approach these documents strategically to move you through the process as painlessly as possible.
  • Airport engineering solutions, both airside and landside, including geometric design, drainage design, construction safety and phasing plans(CSPP), grading plans, marking plans, lighting and signage layouts, and constructing cost estimating.
  • Airport program management including grant administration, DBE plan preparation, CIP development, independent fee estimates, and construction administration and oversight.


  • Road, Street, and Sidewalk Design. From concept through construction, our planning and design team will assist with all phases of the project planning, environmental (if necessary), design, and construction.
  • Storm Water, Wastewater, and Water Utility Design. Often located below the roads, streets, and sidewalks, our design team can assist with the design of these very necessary services..
  • Transportation Planning and CIP Development. The relocation of existing roads, planning for new, and prioritizing funding are areas we can help to ensure the maximum use of available funds in the right places at the right times.


  • Garnering support for further investment in a community is key to project success. We have a successful track record of assisting clients with communicating to funding or approval agencies, the public, stakeholders, and other groups and organizations.

About Us

We are experienced professional planners and engineers, providing solid solutions to meet our client’s needs - remaining engaged throughout the project lifecycle, committed to improving the communities and airports we serve.

Together, the founders of Centurion conducted planning and engineering services for over 100 clients, ranging from airports to municipalities to private industry. Their diverse backgrounds provide you with the benefit of their experience –

  • Airport engineering – runways, taxiways, aprons, drainage improvements, to name a few
  • Airport terminal planning, terminal design, and terminal construction
  • Airport planning – master plans, action plans, ALP preparation
  • Airport support services including DBE plans, PFC applications, and FAA and state grant administration
  • Permitting and routing linear facilities such as transmission line and utilities.
  • NEPA assignments for federal agencies including the EPA, Corp of Engineers, GSA, and the FAA.
  • Facility siting ranging from power plans to new airports.
  • Environmental planning and permitting.
  • Public outreach
  • City comprehensive planning and zoning
  • Industrial and business park planning
  • Infrastructure design including roads and sidewalks.


Centurion actively seeks necessary certifications to support our project teaming partners. Below are our current and pending certifications.

Disadvantaged Business Enterprise (DBE)
New Hampshire
New Jersey
New Mexico
Port Authority of New York/New Jersey
Puerto Rico

Woman’s Business Enterprise (WBE)
Women’s Business Council – Southwest
City of Austin
City of Philadelphia
City of San Antonio
Port Authority of New York/New Jersey
Port of San Antonio
Dallas-Fort Worth International Airport
Small Business Administration (federal, WOSB)

Small Business Enterprise (SBE)
Women’s Business Council – Southwest
Small Business Administration (federal)

Licensed to Perform Engineering Services
New Mexico

Texas Department of Transportation
Pre-Certified in the following areas -
1.4.1 Land Planning/Engineering
1.8.1 Public Involvement
2.14.1 Environmental Document Preparation
3.2.1 Route Studies & Schematic Design
4.2.1 Roadway Design
8.1.1 Signing, Pavement Marking, And Channelization
10.1.1 Hydrologic Studies
17.5.1 Civil Engineering
18.3.1 Utility Adjustment Coordination
18.4.1 Utility Engineering
18.5.1 Utility Construction Management and Verification
18.6.1 Utility Management & Coordination Oversight

Molly Waller

816.519.4653 |


Molly Waller, Principal Planner. Molly began her consulting career as a planner for a large, multinational consulting firm. After gaining experience siting facilities such as power plants and siting and obtaining permits for linear facilities, she moved on, focusing her career on airport planning and program management assignments. Over the past 18 years she has managed or led planning projects at over 60 airports across the nation ranging from the smallest of general aviation airports to medium hub airport.

Molly’s strongest skill set lies in her ability to move projects from concept to funding. This strength is a direct result of her efforts in obtaining NEPA clearances for airport development projects. Planning a project is often the easy part, justifying the project for federal or state grant funding is another story. This justification often begins with Chapter One of the NEPA document, the project purpose and need. Molly takes great pride in her track record of helping clients identify necessary projects and then assisting with getting those projects funded. Over the past 16 years she has built on her NEPA background to become a reputable airport planner leading projects including airport master plans, airport action plans, terminal studies, ALP updates, and CIP preparation and justification.

Molly graduated from the University of Nebraska with a Bachelor’s degree in business administration and a Master’s degree in community and regional planning. This combination of a business and a planning degree has served her airport clients well, while allowing her to extend her services to business and industrial park planning.

The service Molly provides to her clients extends to the community she lives in. She serves a Commissioner for the Lee’s Summit Airport Board of Aeronautics, serves on the Parent Board for St. Michael the Archangel (STM) High School, and helped establish the aviation program at STM, positioning the school as one of the pilot schools for the AOPA High School program.

Molly Waller
David Alexander

David Alexander

325.812.8430 |

David Alexander, PE, Principal Engineer. After graduating from Texas Tech University with a degree in civil engineering he began his career with the Texas Department of Transportation (TxDOT). While working at TxDOT, David gained experience in all aspects of plans, specifications, and estimate development including, surveying and data collection; geometric design; hydrology and hydraulic design of storm sewer systems; design of rehabilitation methods for rigid and flexible pavements; traffic control plans; and construction management. His time with a state agency has proven beneficial to his clients as he understands the inner-workings of government functions such as project prioritizing, funding, and approval.

As an aviation consultant, David has worked on a variety of projects with a total cost exceeding $100 million in improvements. His clients benefit tremendously from his working knowledge of, and experience applying, FAA advisory circulars and guidelines. Of even more benefit is his understanding of FAA expectations and project funding. David regularly assists his clients with tailoring necessary airport improvements to meet funding eligibility requirements. David’s project experience touches every aspect of an airfield – terminals, runways, taxiways, aprons, hangars, access and perimeter roads, fencing to name a few.

For the past 14 years David has supplemented his airport experience with municipal projects. He has been directly involved with the design of typical water and sewer mains, lift stations, pipe bursting, street, and drainage design.

David has held his private pilot’s license since 1996.