SEAOI's Refresher Course Instructors are seasoned professionals who bring years of experience and practical understanding to the classroom.

David P. Gustafson, PhD, PE, SE, is a consulting structural engineer in Winthrop Harbor, Illinois. He has previously worked as a consulting engineer in New Orleans, Louisiana and lectured in the Civil Engineering Department at Michigan Technological University. He is an expert in reinforced concrete, is a consulting member and a past-chairman of ACI Committee 301, Specifications for Concrete Construction, and a consulting member of ACI Committee 318, Structural Concrete Building Code. He has authored and co-authored numerous CRSI technical publications, including several editions of the CRSI Design Handbook, and a variety of technical papers and articles on the design and construction of reinforced concrete structures, and on steel reinforcement. He has also co-authored two books, Structural Design Guide to the ACI Building Code, 4th Ed., 1998; and Structural Design Guide to the AISC (LRFD) Specification for Buildings, 2nd Ed., 1996; and authored chapters on reinforced concrete design and construction in two handbooks published by McGraw-Hill, Inc.

Dr. Gustafson received his B.S in Civil Engineering from Michigan Technological University and his Ph.D. in Civil Engineering from Tulane University. He is a licensed Structural Engineer in Illinois, and Professional Engineer in Illinois, Michigan, and Wisconsin. His awards include ACI Honorary Membership, the ACI Delmar L. Bloem Distinguished Service Award, the ASTM Founding Committee Award, and the ASTM Award of Merit. He is a member of the American Welding Society and its committee on the Reinforcing Steel Welding Code (AWS D1.4/D1.4M); the American Railway Engineering and Maintenance-of-Way Association and its Committee 8 on Concrete Structures and Foundations; and the Canadian Standards Association and its Technical Committee on Reinforcing Materials for Concrete. He has been an instructor for the Refresher Course for over 35 years.

Robert G. Lukas, PE is a Principal at Ground Engineering Consultants, Inc. in Northbrook, Illinois. His expertise in geotechnical projects includes dynamic compaction, pressuremeter testing and interpretation, pile and drilled pier foundations, and slope stability analysis. He has participated in the analysis of six earth dams for the Corps of Engineers in Ohio, where slope stability and seepage studies were undertaken, in-ground improvement recommendations and monitoring of over 300 projects where dynamic compaction was used as a site improvement technique, and in making geotechnical recommendations for nine flood storage projects for the Soil Conservation Service. He has also been involved with analyzing capacity and monitoring pile installations for over 300 projects and interpretation of pressuremeter tests to predict settlement of over 1,000 projects. His research involvement includes a two-year project to prepare a user’s manual on dynamic compaction for the Federal Highway Administration, and a three-year study for the Federal Aviation Administration on thickness design procedures for airfields containing stabilized pavement components.

Mr. Lukas received B.S. and M.S. degrees in Civil Engineering from Northwestern University and is a licensed Professional Engineer in Illinois, Michigan, Wisconsin, New York, Indiana, and Kentucky. He is a member of ASCE's Committee on Foundation & Excavation Standards, ASTM Committee D-18 on Soil and Rock, ISPE, and NSPE. Mr. Lukas was awarded the Martin S. Kapp Foundation Engineering Award by ASCE in 1991 for innovative and outstanding design of the construction of foundations, earthworks, and retaining structures. He has published numerous articles in his career and has been an instructor for the Refresher Course for over 40 years.  

Tony Shkurti, PhD, PE, SE, is an HNTB Fellow, Vice President, and Director of the Bridges and Tunnels Great Lakes Division. He is a nationally recognized expert in structural engineering whose focus is infrastructure solutions beyond the scope of standard procedures. He has led design teams from conceptual design through final plan delivery on projects involving design of precast segmental and cast-in-place post-tensioned concrete bridges as well as steel plate girder bridges with unique or complex framing layouts.

Dr. Shkurti’s research includes seismic retrofit of bridge substructures, redundancy of bridge superstructures, bracing systems, fatigue and fracture behavior of steel bridges, infrastructure security risk assessment, and mitigation and vehicular impact analysis. He has presented and published in numerous venues and has been an instructor for the Refresher Course for over 20 years.

Daniel Roig, PhD, PE, SE is a Vice President at Solutions Engineering Group in Naperville, Illinois and a Partner at Roig Associates in Cary, Illinois. He is an expert in structural analysis and design, failure analysis, and timber construction. He has investigated over a hundred roof system collapses for various building types while working with the metal plate connected truss industry over a thirty-year period. His experience as a consulting engineer involving timber construction includes AEP Consulting Services, Alpine Engineered Products, Inc., and Woodclaw, Inc. Over the past forty years, he has worked on projects worldwide including commercial, industrial, residential, institutional, and governmental buildings and other structural systems, using wood, masonry, concrete, light gauge and hot-rolled steel, plastics, cast iron and other materials, from single story to high-rise.

Dr. Roig received his B.S. degree in Engineering, his M.S. degree in Civil Engineering, and his Ph.D. in Bioengineering from the University of Illinois at Chicago. He is a licensed Structural Engineer in Illinois and Hawaii, and Professional Engineer in Illinois, Indiana, Wisconsin, Michigan, Minnesota, Ohio, and Hawaii. He has lectured on engineered wood design, metal plate connected truss design, and has been an instructor for the Refresher Course for nearly 20 years. 

Jon F. Sfura, PhD, PE, SE is a Senior Associate at Wiss, Janney, Elstner Associates, Inc. in Northbrook, Illinois. Dr. Sfura’s experience includes the assessment of structural distress and serviceability problems, the investigation of structural failures, peer review, and the rehabilitation of structures. He has published and lectured on seismic design and performance, and the assessment and rehabilitation of structures.

Dr. Sfura received his B.S. degree in Civil Engineering from Purdue University, and his M.S. and Ph.D. degrees in Civil Engineering from the University of Illinois.  He studied the nonlinear seismic response of asymmetric steel structures to earthquake ground motions as a doctoral candidate. He is a licensed Structural Engineer in Illinois, Civil Engineer in California, and Professional Engineer in Florida and Michigan. He is a member of the Building Seismic Safety Council (BSSC), Earthquake Engineering Research Institute (EERI), and the Structural Engineers Association of Illinois (SEAOI). He participates on the BSSC NEHRP Recommended Seismic Provisions Committee and ASCE 7 Wind Load Subcommittee. He has been an instructor for the Refresher Course for nearly ten years.

Nathaniel Gonner, SE, is a Senior Engineer at the American Institute of Steel Construction (AISC), where he develops continuing education programming for engineers and members of industry and supports the development of AISC standards and publications.  He serves as secretary of TC 7—Evaluation and Repair and is a member of the committee for ASCE/SEI 41 Seismic Evaluation and Retrofit of Existing Buildings.  Mr. Gonner is the newest Refresher Course instructor but has taught steel design as an adjunct lecturer at the University of Illinois at Chicago. 

Before joining AISC, Mr. Gonner spent eight years as a consulting structural engineer, working on a variety of large-scale projects located in Chicago and throughout the world, including transportation structures, high-rise buildings, and projects featuring architecturally exposed structural steel.  He earned an M.S. in Structural Engineering from Lehigh University, where he researched seismic-resistant self-centering steel frames.  He earned a B.S. in Civil Engineering from Iowa State University and a B.A. in Physics from Truman State University.