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David O. is a Senior Account Manager at United Mechanical, where David oversees the provision of preventive maintenance, repair, retrofit, replacement, and modernization services for commercial and industrial HVAC systems in Northern California. Prior to this role, David worked as an MEP Assessor for the Foundation for California Community Colleges and as a Sales Executive at EMCOR Services Mesa Energy Systems. With extensive experience in sales, account management, and HVAC systems, David has a proven track record of building strong business partnerships and delivering value-added solutions to clients.