Our Team

Senior Expert Staff

Sena Kumarasena, PhD, PE

Principal Engineer, Bridges & Structures

Anthony R. Lancellotti, PE

Principal Engineer
Tunnels, Structural, & Project Management

Abdalla Shalaby, PEng, PE

Principal Engineer

Eldon L. Abbott, PE

Principal Engineer
Tunnels & Geotechnical

Peter F. Donahue, PE

Principal Engineer
Owner Engineering Services

Lucy Jen, PhD, PE

Principal Engineer
Geotechnical & Numerical Modeling

Ralph Borjeson

Senior Associate
Geotechnical & Foundation Engineering

Anudeep Bathula, EIT

Project Engineer
Bridges & Structures

Brian Johnson

Senior Professional
CADD / BIM / 3D Modeling

Esther Seawright

Administrative & Document Control Services

Raymond Thompson

Senior Professional
CADD / BIM / 3D Modeling

Allison Kumarasena

Marketing Specialist

Aniruddha Doke

Mechanical Engineer
Field Inspection

Asal Soltani

Project Engineer
Bridges & Structures

Jeffrey Kauppi

Senior Cost Manager

Nathan C. Porter

Project Manager
Bridges, Tunnels & Structures
Design, Controls, & Construction

Selvin Lendos

Associate Project Consultant
Structural Engineer

Thomas F. Mahoney, PE

Senior Project Manager
Civil Engineer

Technical Experts

John Ratajczak

John Ratajczak is a Charter member of the National Steel Bridge Alliance; Steering Committee Member for Steel Fabrication and Erection; Contributor for the NSBA Steel Erection Manual. Bridge Expert recognized by the American Arbitration Association for dispute resolution, construction arbitration and trial cases involving construction fatalities and construction claims. Considerable experience in cost estimating, bidding, construction engineering, construction project management for complex bridges and other special structures in United States & Overseas.

Tom Martin

Tom has five decades of experience covering all phases of tunnel construction using TBM as well as other mining methods. In addition, Tom’s experience includes the purchase and commissioning of many TMB machines, developing engineer’s estimates for tunneling and other underground work for consulting firms and public agencies, and developing bid estimates for tunneling and underground construction on behalf of construction firms. He has served in varied roles including as Construction Manager, Project Director, and Engineer to the Contract and Project Engineer on various tunneling projects—where he gained hands-on experience in problem-solving and trouble-shooting during tunneling and underground construction projects. Tom also has considerable experience with Tunnel and Underground Design-Build projects where he has served on the Owner’s Engineering Team, Design Engineer’s Team, as well as Contractor’s team. Tom’s participation on these projects included providing conceptual construction means and methods analysis for developing the preliminary tunnel construction schedule and identifying key construction issues relevant to these projects. Both projects are in heavily urban settings with rock and mixed face tunnels and potentially several mined stations.

Donald P. Richards, PE

Don has a unique blend of expertise that includes geotechnical engineering, underground construction of facilities, tunneling, rock mechanics and mining. He has participated in numerous projects from feasibility studies through site investigations, detailed design and construction management. He has represented owners, designers, and contractors. Don’s expertise is in exploration, design, and construction management of various types and sizes of underground excavations. His experience covers a wide geologic range from soft marine soils to hard rock, located in a wide range of geographic environments from the arctic to the tropics and from deserts to mountains. Don is a fellow of the Society of Mining Engineers of AIME; Association of Engineering Geologists; International Society of Rock Mechanics; International Society of Soil Mechanics & Foundation Engineers; British Tunneling Society; International Tunneling Association; International Association of Engineering Geology; American Underground Construction