Leadership

Experienced leaders with a shared commitment to safety, integrity and quality.

Tom McNamara

President & CEO

A third-generation contractor and the grandson of Irish immigrants, Mr. McNamara has contributed to more than 1,000 construction projects across commercial, industrial, residential, and institutional markets. Collectively, these efforts represent billions of dollars in successfully delivered work. With extensive experience spanning both public and private projects, he brings a deep understanding of modern construction methods and a practical, solutions-driven approach to complex challenges. Mr. McNamara earned a Bachelor of Science in Electrical Engineering from the University of Central Florida and holds licenses as a Florida Building Contractor, Electrical Contractor, Underground Contractor, Fire Contractor, SWPPP Inspector, and Florida Certified Burner. He currently serves on the UCF Board of Trustees and was recognized with the 2022 UCF Alumni of the Year Award.

Tim Bayer

COO

Tim joined the SDC team in 2017 as a Project Manager and has risen to be SDC's Chief Operating Officer. In Central Florida, he previously held leadership positions for large heavy highway contractors and local civil utility contractors. Tim focuses on new client development and engagement. He oversees projects from contract to completion while managing budgets, estimating, plan takeoffs, initiating and negotiating change orders with clients, scheduling subcontractors and suppliers and resolving job issues. Tim is a graduate of the University of Kansas.

Shane Cox

VP of Estimating

Shane joined the SDC team in 2019 as Vice President of Estimating. In Central Florida, Shane previously held senior estimating positions for large national and multinational civil heavy highway contractors. Shane is responsible for preparing and coordinating the preparation of full estimates on large and complex projects as required by client's documents and provides complete conceptual and total bid price estimates. Shane is a graduate of the University of Florida with a BS in Construction.

Alex Sorondo, P.E., MBA

VP of Operations

Alex Sorondo serves as SDC's Vice President of Operations, bringing licensed professional engineering experience and an operations-focused approach to the delivery of complex heavy civil projects throughout Central Florida.

Chris Stelly, PLS

VP of Survey

Chris joined SDC in 2020 as the company's VP of Survey. As SDC's on-staff PLS, Chris supervises SDC's field survey crews and the office-based technical survey staff. The survey staff is responsible for the utilization of project controls, project 3D modeling, GPS equipment controls, field collection of as-built data, and computer software in project assignments. In addition, Chris is responsible for all aspects of project control including field data collection, topographical surveys and construction stakeout.

Ronnie Yelvington

VP of Construction

SDC welcomed Mr. Yelvington to our team in 2020, where he brought over 30 years of valuable construction experience in Central Florida. He has played a pivotal role in several other heavy civil firms in the region, making him an exceptional addition to our team. His specialization in heavy highway construction, commercial construction, and private developments gives him a comprehensive understanding of plans, specifications, shop drawings, and sub-trades' scope of work. Mr. Yelvington is proficient in pre-planning subcontractors, materials, look-ahead scheduling and daily project reporting.

David Leehy, CPA

CFO

David joined the SDC team in 2023 as Chief Financial Officer. He previously held leadership positions in the Midwest and Southeast states for general contractors, subcontractors, railroad construction and utility contractors. David focuses on the company's financial position and brings 30+ years of construction experience to the team. As a Certified Public Accountant, David oversees all financial matters and is dedicated to ensuring financial stability and fostering innovation within our team.

JD Donaldson

Operations Manager, A-1 Paving & Asphalt

JD Donaldson serves as Operations Manager for A-1 Paving & Asphalt. He brings hands-on experience in construction operations, estimating and project management, along with a strong understanding of how paving projects are planned, coordinated and executed in the field. JD's practical approach and industry knowledge support accurate estimating, strong communication, and efficient project delivery.

Pete Willson

General Superintendent

Pete is a General Superintendent with 20+ years of experience in heavy civil construction, focusing on large-scale infrastructure projects such as highways, bridges, and utilities. Highly skilled in all aspects of project management, from planning and scheduling to overseeing subcontractors and ensuring safety compliance, with strong expertise in interpreting blueprints, managing materials, and maintaining cost control.

Thomas Ryan

General Superintendent

Thomas Ryan serves as SDC's General Superintendent, bringing more than 36 years of experience managing civil construction projects and field operations. Thomas oversees field personnel, equipment and project schedules while maintaining a strong focus on safety, quality and budget performance. He holds an Associate of Science in Construction Management from Seminole State College of Florida.

Mary Eberhardt

Business Development & Communications

Ms. Eberhardt is responsible for business development and company communications at SDC. Her primary duties include identifying new business opportunities, building and maintaining strong relationships with both prospects and existing clients, and collaborating with company leadership to shape business strategy. Mary helps produce SDC's monthly employee newsletter, SDC Works.

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