Executive Team

Shawn Tunstall, PE

President

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Shawn has more than 20 years of experience in structural engineering. His background ranges from the design of new concrete and steel girder bridges to the rehabilitation of existing historic truss bridges.

 

Shawn’s experience spans the entire engineering and construction process including bridge inspection and rating, finite element modeling and analysis, preliminary and final design, and construction engineering. His construction engineering experience includes the erection of complex curved steel girder bridges. He has published papers and presented at numerous conferences including:

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"Pennsylvania Turnpike Bridge WB-224B - Sliding Into the Future of Transportation"

Co-authored paper, International Bridge Conference, National Harbor, Maryland, 2018.

 

“Corpus Christi Harbor Bridge Rehabilitation." 

Co-authored paper, International Bridge Conference, Pittsburgh, PA, June 2010.

 

“Rehabilitating the Shippingport Bridge for the Present and Future." 

Co-authored paper, International Bridge Conference, Pittsburgh, PA, June 2010.

 

“Construction Engineering Considerations for Highway Bridges." 

Presented and co-authored paper, New York City Bridge Conference, New York, NY, August 2009.

 

“Erection Schemes for Curved Steel I-Girder Bridges – What Structural Engineers Need to Know."

Co-authored article, Structural Engineer Magazine, June 2009.

 

“Erection Engineering Considerations for Curved Girder Bridges." 

Presented and co-authored paper, International Bridge Conference, Pittsburgh, PA, June 2008.

 

“Stabilization of a Two-Girder Pedestrian Bridge." 

Presented and co-authored paper, International Bridge Conference, Pittsburgh, PA, June 2007.

 

“Eklutna River Bridge Rehabilitation: Preserving the Historic Old Glenn Highway Crossing." 

Presented and co-authored paper, published in Conference Proceedings of 2004 Structures Congress, Nashville, Tennessee, May 2004.

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Lateral Bracing Concerns for Long Span Steel Girder Bridges

Co-authored paper, Pittsburgh Engineer, Summer 2019.

 

 

Pat Gaynor, PE

Senior Structural Engineer

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Pat has more than 20 years of experience in structural engineering with a career focused in bridge design. He has been involved in construction engineering for contractors and design of structures.

 

Pat's construction engineering experience includes the design of temporary works, including cofferdams, support of excavation and falsework design - including towers and jacking brackets. He is also experienced in the design of erection and demolition plans for simple and complex steel bridges, and excavation design - including braced excavations, soil and rock anchors, anchor wall tie-backs, soldier pile and lagging, sheetpiling and secant piles.

 

Throughout his career, Pat has been instrumental in substructure and deep foundation design, bridge rehabilitation, and the design and rating of curved and straight steel plate girder bridges, pre-stressed concrete beam bridges, concrete cut and cover tunnels and portals.

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Kent Lindamood, PE

Senior Geotechnical Engineer

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Kent has over 25 years of experience in geotechnical design and construction in the transportation, energy, and private sectors. His expertise includes slope stability/landslide remediation, ground improvement, design of soil nail walls, anchored walls, geogrid walls, and geotechnical reports. Kent has presented on the following topics:

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Soil Nailing

Presenter, Design Services Section for NCDOT, Raleigh, North Carolina, 1994​

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Landslide Repair in NC

Presenter, Geotechnical Branch, Virginia ASCE, Roanoke, Virginia, 1995​

 

 

Brodie Claybaugh, PE

Senior Structural Engineer

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Brodie has 18 years of experience in the design of bridges.  Brodie has performed many bridge jacking and erection procedures throughout his career.  Brodie also has experience with steel building erection and critical lift plans.  Brodie spent part of his career working as an internal engineer for a steel erector, which gives him unique practical experience as an engineer.

 

 

Peter Quinn, PE

Senior Structural Engineer

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Pete is a senior structural engineer with 15 years of experience in the design of bridges.  Pete has performed both construction engineering and up-front bridge design services. Pete has significant experience in contractor support services including bridge design support and excavation support design.  He worked on the erection engineering support for the Hulton Bridge over the Allegheny River in which the main span was strand jacked into position.  Pete is located in the Philadelphia area.  

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Lateral Bracing Concerns for Long Span Steel Girder Bridges

Co-authored paper, Pittsburgh Engineer, Summer 2019.

 

Inelastic Response of a Steel Girder Bridge

Presented and Co-authored paper, Section International Conference on Bridge Maintenance, Safety, and Management, Kyoto, Japan, 2004.

 

Load Rating by Load and Resistance Factor Evaluation Method

Co-authored paper, NCHRP Project 20-01/Task 122, 2004.

 

Understanding Steel Bridge Behavior Through Destructive Testing

Authored Masters Thesis, University of Delaware, 2005.

 

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Lisa Hoeke, PE

Senior Structural Engineer

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Lisa has more than 12 years of experience in the transportation industry. She has performed structural design of highway and light rail bridges, structural rehabilitation, structural analysis, and construction engineering. As a project engineer on several alternative delivery type projects, Lisa has been involved in notable accelerated bridge construction projects. Her construction engineering experience includes bridge erection procedures, demolition procedures, and jacking procedures. Lisa has presented her work at the following engineering conferences:

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Pennsylvania Turnpike Bridge WB-224B - Sliding Into the Future of Transportation

Presented and co-authored paper, International Bridge Conference, National Harbor, Maryland, 2018.

 

The Lardo Bridge Slide-In

Co-presented and co-authored paper, International Bridge Conference, Pittsburgh, PA, June 2015

 

Corrosion of Steel Girder Bridge Anchor Bolts

Co-authored paper, Transportation Research Board Annual Meeting, Washington DC, January 2009

 

Degradation of Steel Girder Bridge Bearing Systems by Corrosion

Presented and co-authored paper, NACE International Corrosion Conference and Expo, Atlanta, GA, March 2009

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Zak Sobotka, PE

Senior Geotechnical Engineer

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​Zak has 11 years of experience in geotechnical design and construction with a specialization in geotechnical explorations, foundations, excavation support/retaining structures, and slope and embankment stabilization. He has performed work for contractors, government agencies, and private clients. While a majority of his career was spent working in geotechnical consulting, Zak has experience working as a design engineer for a nationally-renowned geotechnical construction firm.

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Jarid Antonio, PE

Senior Structural Engineer & Design Build Lead​

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Jarid has over 10 years of experience in bridge design and construction engineering, specializing in design build and alternate design projects. Experience includes design of short and long span structures, various substructure types, retaining walls, bridge rehabilitation, erection plans, demolition plans, shoring walls, and finite element analysis for complex and curved steel structures. Jarid has authored and presented his work on the following topics:

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CSVT River Bridge - Steel Superstructure Design and Optimization (IBC 18-6)

Co-presented and co-authored paper, International Bridge Conference, National Harbor, Maryland, 2018

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Liberty Bridge Emergency Jacking Frame Design for Repair of Fire-Damaged Member (IBC 17-6)

Co-presented and co-authored paper, International Bridge Conference, National Harbor, Maryland, 2017

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