limbach holdings, inc., with estimated revenues of approximately $400 million in 2016, is an integrated building systems provider – managing all components of mechanical, electrical, plumbing and control systems, from system design and construction through performance and maintenance. the company engineers, constructs and services the mechanical, plumbing, air conditioning, heating, building automation, electrical and control systems in both new and existing buildings. customers include building owners in the private, not-for-profit and public/government sectors. with headquarters in pittsburgh, pa., limbach operates from 10 strategically located business units throughout the united states including western pennsylvania (pittsburgh), eastern pennsylvania (warrington, pa), new jersey (south brunswick), new england (wilmington, ma), ohio (columbus and athens, oh), michigan (pontiac and ann arbor, mi), southern california (garden grove, ca), and mid-atlantic (laurel, md). our design engin