Donald J. Leidy, Principal of MDG, has 30 years of experience in the planning, design and construction of maintenance facilities across the nation. His expertise encompasses programming, master planning, facility functional design, preparation of equipment requirements and specifications, and development of standards for inventory and building maintenance systems. As Principal, Don is responsible for all aspects of MDG's work. His project work includes more than 300 transit, municipal, school district and other industrial maintenance and storage facilities. He has recently worked on municipal projects for City of Golden, Colorado; City of Long Beach, California; and transit projects for Regional Transportation District (RTD), Denver, Colorado; Los Angeles Metro, Los Angeles, California; Valley Metro, Phoenix, Arizona; Washington Metropolitan Transit Authority, Washington, D.C.; and SunTran, City of Tucson, Arizona.
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Mark A. Ellis, Senior Project Manager in MDG's Houston office, has 15 years of experience as a planner and functional design specialist providing facility design services to clients throughout Texas and nationwide. Mr. Ellis has significant experience in preparing facility master plans, facility conceptual designs, site selection studies, facility design criteria, equipment selection, specification and layout, and construction documents. He has participated in facility design on more than 140 projects, including planning and design of more than 28 transit maintenance facilities with fleets ranging from 50 to 250 standard and articulated buses, more than 35 municipal facilities for fleets of 50 to 2,800 vehicles, and several school district vehicle and building maintenance facilities throughout the United States. Mark has also participated and managed several facility planning studies and analysis efforts. His recent projects include providing programming, planning design, and equipment planning for municipal facilities in Copper Mountain, Colorado; Chula Vista, California; El Paso, Texas; Fremont, California; Josephine County and Washington County, Oregon; La Mesa, California; Lacey, Washington; Northridge, California; and San Diego, California; transit and paratransit facilities in Green Bay, Wisconsin; Long Beach, California; Montebello, California; Johnson County, Kansas; Metro Transit, Minneapolis, Minnesota; Tacoma, Washington; West Covina, California; and airport maintenance facilities in Costa Mesa, California; and Dallas/Fort Worth, Texas.
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Steve Silkworth, Senior Project Manager, operates out of MDG's Denver office. Mr. Silkworth has more than 28 years of diverse experience in architecture and planning in the private sector for both government and commercial clients. His background includes commercial architecture, design/build ventures, land-use planning, environmental laboratories, vehicle maintenance, heavy and light rail facilities, and transit buildings. His project experience includes more than 85 municipal and transit shops and vehicle maintenance facilities, which includes project management responsibilities for the award-winning Elati Light Rail Maintenance and Operations Facility for the Regional Transit District in Denver, CO; Onondaga County Jamesville Maintenance Facility in Syracuse, NY; County Fleet Management Facility and Water Quality Corporate Yards in Sacramento, CA; I-70 and North I-25 Corridor Projects in Denver, CO; Big Blue Bus Campus Expansion in Santa Monica, CA; Colorado Springs Utilities Master Planning and Final Design, Colorado Springs, CO; and Value Engineering for projects including Sound Transit (Portland, OR), MTA (Los Angeles, CA), MARTA (Atlanta, GA), CalTrain (San Francisco, CA), and New Jersey Transit.
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Steve Radomski, Senior Project Manager in MDG's Baltimore office, has more than 30 years of diverse experience as an architect in the programming, planning, design and construction of facilities for both government and commercial clients. He led the transit practice for a large national architecture firm and has participated in facility design on more than 40 operations and maintenance facility projects for transit, public works, utilities, school district and military clients. As a LEED Accredited Professional, he has been a leader in the transit industry in the design and construction of green, sustainable facilities. His recent public works facility projects include facilities for the City of Colorado Springs, Colorado; City of Redondo Beach, California; City of Golden, Colorado; and Boulder County, Colorado. His recent transit facility projects include facilities for Denton County Transit Authority in Texas; Regional Transportation District in Denver, Colorado; Victor Valley Transit Authority in Hesperia, California; Kenosha Transit in Wisconsin; Triangle Transit Authority in Research Triangle Park, North Carolina, Regional Transportation Commission in Las Vegas, Nevada; LA Metro in Los Angeles, California; South Bend Transit in Indiana; and Madison Transit in Wisconsin.
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Jon Holler, Senior Project Manager in Maintenance Design Group's Pasadena office, has more than 15 years of experience in design and construction of maintenance and operations facilities. His experience includes planning and design of municipal service centers, transit facilities, and vehicle maintenance facilities. He has worked on dozens of transit and public works maintenance facility projects, including the Transpo Operations Facility in South Bend, Indiana, which is designed to receive LEED® Platinum Certification, along with the proposed LA Metro Division 13 project in Los Angeles, California, designed to receive LEED® Gold Certification.
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