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Public Works Executive Profile

As Interim Public Works Department Director for the City of Tacoma, Josh Diekmann is responsible for the City’s facilities management and real property services, street operations and grounds maintenance, streetlights and traffic signals, capital projects, design and construction services, fleet services, parking management, active transportation and traffic safety programs, commercial vehicle enforcement, and local improvement districts. More than 300 City staff are employed with the Public Works Department, which has a 2023/2024 adopted Biennial Budget of $250 million.



The City of Tacoma Public Works Department is accredited by the American Public Works Association.  Learn more about the Department at Public Works' page.


Josh joined the City in 2009 and has also served as Interim Assistant Public Works Director, Transportation Division Manager, Assistant Engineering Division Manager, and as City Traffic Engineer.  Josh’s experience prior to joining the City included roles focused on civil engineering, management consulting, research, transportation planning, and project management for private clients and for government at the state, local, tribal, and federal levels.



  • B.S., Engineering, Colorado School of Mines
  • M.S., Transportation and Infrastructure Systems Engineering, Virginia Tech


  • American Public Works Association
  • Institute of Transportation Engineers

Registrations and Certifications

  • Professional Engineer (Washington)
  • Professional Traffic Operations Engineer


Josh Diekmann, P.E. PTOE

Interim Public Works Director/City Engineer