Madalyn Keen

Engineering Intern

Madalyn’s experience includes horizontal and vertical design, pavement design, cross slope correction, 3D modeling, and plans production.

Project Experience

Madalyn’s project experience includes minor and major design projects, including resurfacing, guardrail improvements, safety improvements, signing and pavement markings, signalization, and traffic control.

Started

2026

Professional License

Engineering Intern, FL, #1100030431 (07/09/2026)

Education

Bachelor of Science in Civil Engineering (BSCE) 2026

University of South Florida (USF)

Affiliations

  • American Council of Engineering Companies (ACEC)
  • American Society of Highway Engineers (ASHE)
  • Transportation & Expressway Authority Membership of Florida (TEAM FL)

Outside of Work

In her free time, she enjoys reading, spending time at the beach, and staying active.

Alma mater

Our Team

Allie Stanley, PE

Roadway Engineer

Allie Stanley, PE, is experienced in horizontal and vertical roadway design, maintenance of traffic design, and has a passion for 3D modeling. Project Experience Allie has experience in a variety of projects ranging from major highway and interstate reconstruction projects to minor intersection and pedestrian improvement projects. She specializes in roadway and pedestrian facilities design […] Read More

Mark Bayer, PE

President, Senior Roadway Engineer, Project Manager

Mark Bayer, PE, has extensive experience in roadway design, maintenance of traffic design, drainage design, utility coordination, project management, and contract management. Project Experience Mark’s project experience includes major roadway reconstruction projects, such as widening from two lanes to four lanes, and minor design projects, including intersection improvements, resurfacing, sidewalks, and trail projects. His projects […] Read More

Sarah Wright, PE

Vice President, Roadway Project Manager

Sarah Wright, PE, has extensive roadway horizontal and vertical design experience, including maintenance of traffic design and utility coordination. Project Experience Sarah’s project experience includes minor design projects such as intersection improvements, resurfacing, sidewalks, and trails and major reconstruction projects such as widening from two lanes to four lanes. She has experience in all phases […] Read More

Gary Gaiotti

Chief Roadway Designer

Gary Gaiotti has more than four decades of experience in the civil field, beginning his career as a Survey Rod Man, then Party Chief, and then Roadway Design. Project Experience Gary has worked extensively with the Florida Department of Transportation within Roadway Design on projects that include: design and plans production of multiple disciplines, including […] Read More

Zachary Cross, PE

Drainage Engineer

Zachary Cross, PE, is an experienced stormwater management designer. His drainage design experience includes dry and wet treatment, storm sewer design for urban and suburban roadways, ditch design for rural roadways, design highwater analysis, pond siting analysis, cross-drain analysis, drainage reports, flooding investigations, environmental resource permitting, basin analysis, stormwater management facility design and modeling, and […] Read More

Tim Easley, PE

Roadway Engineer

Tim Easley, PE, has experience in many facets of transportation design, including new construction, widenings, rehabilitation projects, and intersection improvements. He enjoys working with others to create innovative designs and learning new methods and strategies to improve his engineering skills. Project Experience Tim’s project experience includes major roadway reconstruction projects, such as widening from two […] Read More

Robin Crawford

Project Coordinator

Robin Crawford has 8 years of experience as a project coordinator. Her experience includes contract management, invoicing, preparing audit packages, and reviewing and maintaining financial records for projects. Robin is a Florida native still currently residing north of Gainesville. In her free time, she enjoys spending time with her 2 children, traveling and spending time […] Read More

Afton Bayer

Business Administrator

Afton Bayer graduated from the University of South Florida with a Bachelor of Science degree in Nursing . She practiced for 13 years as a RN in the Emergency Room and Preop and PACU. When Bayer United opened, she left her passion in medicine to help Bayer United in their vision to grow.   Afton […] Read More

Marcello Tavernari, PE

Senior Project Manager

Marcello Tavernari, PE has extensive experience in various roles and responsibilities in the Roadway, Drainage, Utility, and Civil Engineering/Construction fields. Marcello’s experience includes managing and coordinating funding, planning, design, permitting, and construction activities for public roadway, stormwater, and utility projects. He ensures all project deliverables related to public safety, quality, cost, schedules, and public transparency […] Read More

Priscilla Buchanan

Project Coordinator Assistant

Priscilla has been a project coordinator since 2017. Her experience includes contract management, invoicing, and reviewing and maintaining project financial records. She graduated from the University of Texas with a Bachelor of Liberal Arts in Linguistics. Priscilla was born in Florida but currently resides in Colorado and loves it. Aside from spending time with her […] Read More

Richard Endrzejewski, PE

Senior Engineer / Project Manager

Rich’s extensive project experience includes roadway design, drainage design, maintenance of traffic design, utility coordination, project and contract management on major and minor roadway reconstruction projects, including intersection improvements, resurfacing, widening, sidewalks, and trail projects. Project Experience Rich’s projects involve resurfacing, widening, safety improvements, drainage improvements, signing and pavement marking, permitting, traffic control, specifications, quality […] Read More

Anna Holloway

Engineering Intern

Anna Holloway joined Bayer United Engineering Consultants in 2025 after graduating from the University of Notre Dame with a degree in Aerospace Engineering. During her time at Notre Dame she completed several hands-on projects, including designing and building a scale model bridge to support structural loads and being a part of a senior design team […] Read More

Andrew Geisel, PE

Project Manager, Office Manager

Drew Geisel, PE has experience in all stages of project development from design to construction management to construction inspection and closeout. His design experience is the most extensive including multiple shared-use paths, roundabouts, intersection improvements, streetscapes, local road extensions, and resurfacing for all functional classifications of roadways. These projects include many complicated traffic control plans, […] Read More

Elizabeth “Izzy” McAlister, EI

Project Manager

A Florida native and University of Florida graduate, Izzy McAlister is an engineer driven by a passion for building infrastructure that strengthens communities and improves daily life. She brings a strong technical foundation in stormwater management, utilities, and land development, along with experience managing complex projects from design through permitting and construction. Before joining Bayer […] Read More

Sean Crockett, PE

Roadway Engineer

Sean Crockett, PE, is a roadway engineer with experience in the design and development of transportation infrastructure projects across Florida. His work includes new roadway construction, roadway widening, and resurfacing and rehabilitation projects, where he contributes to delivering safe and efficient solutions for growing communities. Sean has experience in both vertical and horizontal geometry design […] Read More

Jeramy Brock

CADD / Computer Technician

Project Experience Jeramy began his career in the surveying field, where he gained experience working on transportation projects and developed strong skills in CAD and related modeling software. Since then, Jeramy has transitioned into roadway engineering, where he’s continuing to grow, learn, and take on new challenges.  Originally from Kentucky, Jeramy moved to Tampa, Florida […] Read More

Hayley Samu

Marketing Coordinator

Hayley is a Marketing Coordinator with 10 years of experience managing global programs. Most recently, she spent 6 years on a project that helped women around the world enter the energy and water sectors. She has an MA from Johns Hopkins University and a BA from Baylor University. She was born and raised in California […] Read More