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On July 2, Walker Consultants announced the appointment of four new company principals. Congratulations team!


Sean Connolly

Sean Connolly, RA, RWC, CCS (Irvine), has been promoted to Principal. Sean is Director of Building Envelope in Walker’s California offices. In the entire building envelope, Sean’s expertise includes above- and below-grade waterproofing, exterior walls (including windows and doors), and roofing for new construction and renovation projects.


Charles Hammond portraitCharles Hammond, PE, SE, CWI, LEED AP (Austin), has been promoted to Principal. Charles is a Senior Restoration Consultant in the Austin office. His diverse international and domestic background has included restoration projects, new design projects, forensic investigations, and litigation work.


David Lieb, TDM-CPDavid Lieb, TDM-CP (Denver), has been promoted to Principal. David is National Director of Higher Education Mobility Planning. Based in the Denver office, David focuses on parking and transportation demand management (TDM) strategies and operations at colleges and universities.


Mike RetterathMike Retterath, PE (Minneapolis), has been promoted to Principal. Mike Retterath is the Director of Restoration in Walker’s Minneapolis office. He is responsible for managing and coordinating restoration projects and evaluation, design, and project management.