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 engineering and architectural staff hold licenses in 44 states, U.S. Virgin Islands and parts of Canada.
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 unparalled 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 project oversight of the firm's evaluations, investigations, and field/laboratory testing services. His experience spans 32 years specializing in the investigation and repair of distressed and deteriorated structures and the performance of building materials and systems. He consults in the areas of structural analysis, complete collapse, design peer review, water leakage investigation, and expert witness testimony.
KENNETH M. LIES, AIA | Senior Principal
Ken is the Vice President and Owner of RRJ with over 33 years specializing in all aspects of architectural engineering, building envelope 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 envelope 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 collapses and failures, 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. | Associate Principal
George has 29 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 | Associate Principal
Sarah has over 15 years of architectural experience specializing in water/moisture intrusion investigations, building envelope repair design, field testing of distress structures, and nonperforming buildings and material systems. Her building enclosure expertise includes hygrothermal modeling, Building Enclosure Commissioning (BECx), and litigation support.
PATRICK E. REICHER, S.E., REWC, REWO, CCS, CCCA | Associate Principal
Patrick has 12 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, field quality testing, 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 over 16 years 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 15 years of structural engineering experience in structural design, evaluation, analysis, condition assessment, and constructability review for a wide range of building types and structures. For over a decade, he managed the design of significant size aviation, stadium, entertainment complexes, and hospitality projects.
ROBERT C. HAUKOHL, P.E. | Senior Engineer
Robb has 24 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 specializes in structural analysis, field investigation, nondestructive evaluations, and repair design of cast-in-place and precast concrete, masonry, steel, and timber structures.
ANDREA L. BAIRD, NCARB, CCCA, LEED AP BD+C, BECxP, CxA+BE | Senior Architect
Andrea has over 11 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 seven 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.
BARTOSZ LIPINSKI, S.E., P.E. | Engineer II
Bart has eight 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.
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.
PATRICK OLECHNO, P.E. | Engineer I
Patrick has six years of engineering experience in structural design and analysis, evaluation, testing, and construction inspection of existing structures and hydro-mechanical components. His background includes masonry repair design, investigation, and construction, including masonry wall and facade assessments and diagnostic field testing,
COLIN P. RUEB, P.E. | Engineer I
Colin has over four years of engineering experience in field investigations and condition surveys of distressed buildings, water intrusion and air infiltration testing, structural analysis, and litigation support for a wide range of projects.
BARBARA J. SMITH, S.E., P.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 36 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 29 years of marketing and business development experience with global and regional multidiscipline design and expert consulting engineering firms.