Keen has over twenty-five years of experience as a subcontractor/general contractor in the residential, commercial, and municipal construction industries. His experience encompasses hands-on, in-the-field construction experience, crew management, scheduling, estimation, contract negotiations, along with all the other skill sets required to manage a multi-employee construction company. Keen's initial experience was in site preparation, demolition, precision demolition, compaction, rebar structure fabrication and installation, concrete flatwork installation, metal building erection, and masonry wall instillation areas.

Other minor hands-on skills encompass heavy equipment operation, underground RCP pipe and structure installation, sheetrock, painting, roof, plumbing, electrical, HVAC, windows, doors, trim, irrigation, sod, asphalt, concrete curbing, tile, concrete trenching, stem walls, retaining walls, sheet piling installation, dewatering systems, bypass pump systems, lift station design and installation, structural wall removal and installation, building waterproofing. As a general contractor, his experience relates to new construction, remodeling, historic restoration. Keen has managed projects in Florida, California, and Louisiana.

Keen has over 5 years of experience as a construction industry consultant for the residential, commercial, and legal industries (business owner). His experience includes residential and commercial property evaluations for transactional sales, construction phased inspections, insurance inspections, product failure analysis, permit research, unpermitted construction activity, water intrusion, construction defects, quality control.