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Mesa Energy Systems, Inc.  (14) Kinder Morgan  (13) Rabalais Constructors, LLC  (10) CoolSys  (8) SmartTech Contracting LLC  (7) Aircond Corporation  (5) EMCOR Facilities Services, Inc.  (4) DeBra-Kuempel Inc.  (3) Scalise Industries Corporation  (3) EMCOR Services New York/New Jersey, Inc.  (3) Haynes Mechanical Systems  (3) Hill York Services Corporation, LLC  (2) Control Solutions Group, Inc.  (2) The Betlem Service Corporation  (2) Hugh Chatham Memorial Hospital  (2) CCI Mechanical, Inc.  (1) Dallas Mechanical Group LLC  (1) Mechanical Services of Central Florida, Inc.  (1)