United States Army Corps of Engineers | Royal Engineers | Institute of Electrical and Electronics Engineers | American Society of Civil Engineers | Corps of Engineers | Institution of Civil Engineers | Boston Consulting Group | Institution of Mechanical Engineers | Royal Electrical and Mechanical Engineers | Institute of Radio Engineers | American Institute of Chemical Engineers | New Enterprise Associates | management consulting | Landor Associates | Information technology consulting | Society of Manufacturing Engineers | Presidential Early Career Award for Scientists and Engineers | National Society of Black Engineers | Management consulting | Health Management Associates | Engineers Without Borders | Western Society of Engineers | Society of American Military Engineers | Royal Australian Engineers | Political consulting | Institute of Electronics, Information and Communication Engineers | Company of One Hundred Associates | Associated Society of Locomotive Engineers and Firemen | American Society of Agricultural and Biological Engineers | TA Associates |
Professor Lucas served as Senior Advisor in many organizations including: Bank Mellat, Iran Railway Development Consultants, Manufacturing Research Corporation of Ontario-MRCO, Ministry of Energy, Iranian Bankers' Investment Company-IBICO and Megerdumian and Associates Consulting Engineers.