Our structural engineers, architects, and field/lab testing technicians are committed to the delivery of attentive, responsive problem solving services
Headquartered in Willowbrook, Illinois and offices in Chicago, our staff are deployed on projects located throughout the U.S. and globally. Collectively, our professional staff hold licenses in 44 states.
Our Principals are recognized leading experts in their respected fields of forensic structural engineering, forensic architecture, field/laboratory testing, and building sciences. With accomplished careers spanning over 30 to 40 years, each brings unparalleled knowledge, project execution, and expert witness experience to the leadership and delivery of our expert consulting services.
KURT R. HOIGARD, P.E., SECB, F.ASTM | Senior Principal
Kurt is the President of RRJ and responsible for the leadership and oversight of the firm's consulting and testing services. He has specialized in the investigation and repair of distressed and deteriorated structures and the performance of building materials and systems, and consults in the areas of structural analysis, complete collapse, design peer review, water leakage investigation, and expert witness testimony. Kurt was named among the world's leading expert witnesses by Who's Who Legal: Construction 2019 and received the 2019 Expert Witness Award, Construction-USA from Lawyer Monthly magazine.
KENNETH M. LIES, AIA | Senior Principal
Ken is the Vice President and Owner of RRJ with 35 years specializing in all aspects of architectural engineering, building enclosure consulting, material and system applications, and building diagnostics. His portfolio of experience has been diverse involving a variety of projects ranging from investigation and evaluation to rehabilitation of numerous buildings. He provides litigation consulting and expert witness testimony on building enclosure performance issues and failures.
OTTO C. GUEDELHOEFER, S.E., F.ASCE | Principal
Chuck has over 46 years of experience in structural engineering and forensics, field/laboratory testing, design peer review, litigation consulting, and expert witness testimony. He has directed hundreds of investigations for many high profile structural collapses and failures in the United States and condition assessments and repair designs of distressed and aged structures.
ROBERT J. KUDDER, Ph.D., S.E., FASTM | Principal
Bob has over 40 years of experience in structural forensics and building enclosure performance. An industry leading building enclosure expert, he has conducted studies related to functional problems of walls and developed instrumentation to monitor condensation and its impact on wall behavior. He consults in the areas of peer review, repair design, litigation consulting, and expert witness testimony.
DENNIS K. JOHNSON | Principal
Dennis has over 40 years of experience specializing in the investigation, evaluation, field testing, and repair design of fenestrations, wall systems and glazing materials. He has performed numerous investigations of exterior wall systems, including window, curtain wall, and skylight systems with air infiltration, water leakage, material, and other performance related problems. He consults in the areas of design peer review, construction quality assurance programs, and dispute resolution.
GEORGE R. MULHOLLAND, S.E., P.E. | Principal
George has 30 years of experience and expertise in structural and facade evaluation, investigation, and collapses. He has specialized in the condition assessment and repair design of new and existing buildings, and structural analysis of concrete, masonry, steel, and timber structures. He provides litigation support and expert witness testimony related to structural and facade design and construction defects.
SARAH K. FLOCK, NCARB, BECxP, CxA+BE | Principal
Sarah has over 17 years of architectural experience specializing in water/moisture intrusion investigations, building enclosure repair design, field testing of distress structures, and nonperforming buildings and material systems. Her building enclosure expertise includes hygrothermal modeling, Building Enclosure Commissioning (BECx), consulting on new construction, and litigation support.
PATRICK E. REICHER, S.E., REWC, REWO, CCS, CCCA | Principal
Patrick has over 14 years of experience in the forensic investigation, evaluation, and repair design of buildings and enclosures, from recently constructed to historic structures. An exterior wall expert, he has specialized in the project management of building enclosure consulting and field quality testing for new construction, and construction documentation and construction observation of major repair programs.
Engineers | Architects
ROBERT W. KRITZLER, S.E. | Consultant
Rob has 37 years of structural engineering experience in design, evaluation, repair, and failure investigation of buildings and bridges. His experience covers all major structural materials and systems, including structural steel, reinforced concrete, precast/prestressed concrete, post-tensioned concrete, masonry, and timber.
WILLIAM J. MACICAK, S.E., P.E. | Senior Project Engineer
Joe has 18 years of experience managing on-site investigations of large-scale complexes with emphasis on the diagnosis, analysis, testing, and repair design of distressed concrete, wood, and masonry structures, materials, and construction components. With his knowledge of structural performance and failure, he provides forensic support for dispute resolution and development of expert technical opinions.
BRIAN T. LAMMERT, S.E., P.E. | Senior Project Engineer
Brian manages RRJ's laboratory and field testing services, coordinating the design and specifications for standard and customized testing programs. His background and experience includes investigation of existing buildings and complete collapses, structural analysis and peer review, repair design, and implementation of remedial construction programs.
MATTHEW L. WAGNER, S.E. | Senior Project Engineer
Matt has 17 years of structural engineering experience in design, evaluation, analysis, condition assessment, and constructability review for a wide range of building types and structures. For over a decade, he managed the structural design of significant aviation, stadium, entertainment complexes, and hospitality projects.
LURITA MCINTOSH BLANK, AIA, NCARB, RBEC | Senior Project Architect
Lurita has 12 years of architectural experience specializing in building enclosure consulting in the areas of masonry conservation, facade restoration, roofing / waterproofing investigation and repair design, and enclosure commissioning for new construction. Her portfolio includes numerous historic landmark structures that address enclosure performance issues related to restoration design, adaptive reuse, and historic preservation.
ROBERT C. HAUKOHL, P.E. | Senior Engineer
Robb has 25 years experience in the investigation and repair design of distressed buildings and structures and providing litigation support services for a wide range of matters.
COLE W. GRAVEEN, S.E., P.E. | Senior Engineer
Cole has over 17 years of experience in structural analysis, field investigation, nondestructive evaluations, and repair design of cast-in-place and precast concrete, steel, and timber structures.
ANDREA L. BAIRD, NCARB, CCCA, LEED AP BD+C, BECxP, CxA+BE | Senior Architect
Andrea has over 12 years of architectural experience specializing in the evaluation and repair design of building enclosure components and systems, air/water infiltration field testing, and architectural and structural design of new and existing buildings. Her building enclosure expertise includes architectural peer review, thermal testing, and Building Enclosure Commissioning (BECx).
CAROLE M. CEJA, NCARB, RRC | Architect II
Carole has 12 years of architectural experience specializing in the evaluation, investigation, design, and repair of roofing and waterproofing systems. A Registered Roofing Consultant, she has extensive knowledge of roofing materials and assemblies, repair/replacement approaches, and construction quality assurance programs.
KYLE D. MAGNUSON, NCARB | Architect II
Kyle has eight years of architectural experience in field investigation, field testing, and condition survey documentation of distressed building enclosures and structures. He has developed repair design drawings and specifications and performed construction administration and observation on large-scale repair programs.
DAVID C. FORTINO, NCARB | Architect II
David has over seven years of architectural experience specializing in the evaluation, investigation, design, and construction contract administration for repair solutions involving both new buildings and distressed structures. His investigative expertise includes air leakage and water penetration field testing, moisture diagnostics, and condition survey documentation.
BARTOSZ LIPINSKI, S.E., P.E. | Engineer II
Bart has nine years of structural forsenics experience in field investigation, condition survey documentation, and remedial design. He specializes in structural analysis in the areas of load path determination, calculation review, and computer modeling of existing structures and structural components.
JACOB W. ARNOLD, P.E. | Manager of Testing Services
Jacob manages RRJ's field and laboratory testing services and is responsible for the day-to-day operations from purchasing, test program design, and equipment calibrations to data recording instrumentation and implementation of test programs. He is experienced in both laboratory and in situ testing of building materials, on-site quality control testing, and development of monitoring programs to investigate the effects of environmental conditions and the performance of building components.
REBECCA R. BOOTH, NCARB | Architect I
Rebecca has over five years of experience in the development of drawings and specifications for remedial repair programs to resolve nonperforming build enclosure systems and components. She has conducted investigations involving condition survey documentation and laboratory testing and performed field inspection and construction observation on select repair projects.
ETHAN T. RATTRAY, NCARB | Architect I
Ethan has over five years of architectural experience in field investigations and evaluations of water intrusion and air infiltration through building enclosure systems, condition survey documentation, development of repair drawings and specifcations, and construction administration.
COLIN P. RUEB, P.E. | Engineer I
Colin has over four years of engineering experience in structural investigations and material analysis to determine failure causation related to concrete and prestressed concrete construction, as well as developed repair designs to address concrete corrosion, strengthening, spalling and other problems.
BARBARA J. SMITH, S.E. | Director of Business Operations
Barbara manages the day-to-day operations of RRJ and is responsible for risk management, finance, contracts, professional licensure, and oversight of the accounting, administrative, and technology support personnel. An accomplished structural engineer, her career spans over 37 years in forensic engineering, project management, and business operations.
KATE M. BRANNELLY, FSMPS, CPSM | Director of Business Development
Kate is responsible for the marketing operations and implementation of RRJ’s firm-wide client development, communications, and promotional initiatives. An A/E/C industry marketing leader, she has 30 years of marketing and business development experience with global and regional multidiscipline design and expert consulting engineering firms.