Williston "Bill" L. Warren IV, S.E., Principal Structural Engineer of SESOL, Inc. has over 40 years of experience as a Professional Structural Engineer. As a Professional Structural Engineer in California I have served on several Professional Structural Engineering Associations, Structural Engineers Association of California (SEAOC), the National Council of Structural Engineering Associations (NCSEA) and the Applied Technology Council (ATC) Board of Directors. I have also served as President of the Structural Engineers Association of Southern California (SEAOSC) and the Structural Engineers Association of California (SEAOC). As Principal Structural Engineer of SESOL, Inc., I have become a leading structural engineering consultant to building owners, apartment building owners, apartment building owners associations, homeowners associations, lenders, insurers and litigator in the field of evaluation of distressed or damaged buildings and structures, foundations and supporting soil conditions. SESOL, Inc. has performed everything from building condition surveys to full structural engineering analysis of as-built conditions of buildings using the most current technology and methodologies, upon completion of structural engineering analysis the preparation of remediation and repairs recommendations and construction documentation for those remediation and repairs has also been included.My participation in professional activities gives me access to the most current building code development, analysis and design practice changes and development of most current and future analysis and design tools. SESOL, Inc. uses the most current structural engineering analysis and design technology available and develops customized evaluation, analysis and design tools in-house for specific and tailored needsI have been a presenter and speaker at many professional conferences and conventions addressing a diverse range of topics.