Wayne Ma, PE President and CEO

Wayne Ma has fifteen years of experience in providing geotechnical and construction materials testing services and is very knowledgeable in local and state requirements and construction procedures. Mr. Ma has successfully completed over 300 projects in educational, residential, commercial, and industrial development.

Wamiq Hamid, PE Vice President

Wamiq Hamid, PE serves as Vice President and Principal Engineer at DMY. He has more than 20 years of experience working in the construction field on a variety of projects ranging from small residential or commercial buildings to multi-billion dollar transportation projects. His prime service areas include construction management with an emphasis on QA/QC services and laboratory operations. Mr. Hamid has extensive experience in field inspection and testing of deep foundations, bridge construction, MSE walls, and pavements. He has been involved in several design-build projects in DC Metro area as Quality Assurance and Quality Control Manager

Paul Zhang, PE Vice President

Paul Zhang, PE serves as Vice President and Director of Geotechnical Engineering at DMY. Mr. Zhang has more than 15 years of experience in geotechnical engineering, construction materials testing and inspection and construction management.  He has extensive experience in the public sector, especially in transportation, and has successfully completed a wide array of projects with the Department of Transportation (DOT) and the Federal Aviation Administration (FAA).   Prior to joining DMY, Mr. Zhang was the Branch Manager of a well-established engineering consulting company.

Dr. Xin Chen, PE Practice Leader, Geotechnical

Dr. Xin serves as the Practice Leader for the Geotechnical Division. He has more than 16 years of geotechnical engineering, pavement design, pavement management, project management, & program management experience. Dr. Chen has extensive experience in geotechnical and geological subsurface exploration for site characterization using auger boring, split-spoon sampling, Standard Penetration Test (SPT), Cone Penetration Test (CPT), Dilatometer Test (DMT), etc. Dr. Chen also has extensive experience in geotechnical laboratory testing including soil compaction, permeability measurement, consolidation test, direct shear test, unconfined compression test, and triaxial test. Dr. Chen has extensive experience in providing geotechnical and pavement engineering recommendations on highway transportation projects such as embankment, cut slopes, steepened soil slopes, shallow foundations, immediate foundation, deep foundations, slope stability analysis, soil slope stabilization solutions such as Reinforced Soil Slope and imbricated stone wall, soil improvement solutions such as geosynthetic reinforcement, dynamic soil compaction, stone column, wick drains, compaction grouting, and micropiles; retaining wall structures such as concrete cantilever wall, gravity wall and Mechanical Stabilized Earth wall. Dr. Xin Chen has experience in pavement management, pavement engineering/design, pavement field data collection, pavement condition evaluation, and pavement forensic study. Prior to joining DMY, he was with Maryland State Highway Administration from 2006 to 2016 and he was Assistant Division Chief for the Maryland State Highway Administration, responsible for two technical programs: Geotechnics and Specification Review.

Daniel Pao Practice Leader, Drilling

Mr. Daniel Pao has over thirteen years of drilling experience in various residential and commercial projects in the Washington DC, Maryland, Virginia, and Pennsylvania area. He is very familiar with the local geology and drilling requirements and is very knowledgeable in roadway soil borings and post-hole clean-up and repair as well as proper drill rig access and set-up in live traffic. Mr. Pao has operated various drill rigs, including CME 45C, CME 55LC, CME 550, CME 75, CME 55, Acker Scout, Diedrich D50, Simco Skid Rig, Little Beaver Mechanical Drill, as well as Tripod. He has successfully performed drilling related tasks such as: Hollow Stem auger drilling, NW/L rock coring, Mud Rotary drilling, Monitoring Well Installation, Seismic Geophone Installation, Inclinometer Installation, Temporary Piezometer, Collaboration with Pressure Meter testing, Percolation Test Pipe Installation, Infiltration Testing, DCP testing, and Well Abandonment. Mr. Pao also has experience managing drill crews who speak foreign languages. He is fluent in English, Spanish, and Mandarin Chinese.

David Arwood Marketing Director

David Arwood serves as Marketing Director at DMY. David began his marketing career over 20 years ago and has been a marketing professional in the A/E/C industry since 2000. David has worked for an architecture firm, a civil engineering firm, an MEP firm, and now leads the marketing efforts to help DMY become the leading geotechnical firm in the Washington metropolitan area.

Phase I, Dulles Metro Rail

    This project involved the design and construction of a 23.1-mile extension of the existing 103-mile long WMATA rail system. Upon completion, Dulles Metrorail will provide high-quality, high-capacity transit service in the Dulles Corridor. New Metrorail service in the corridor will result in travel time savings between the corridor and downtown D.C., expand the […]

Phase II, Dulles Metro Rail

The Dulles Corridor Metrorail Project (DCMP) is undertaken by MWAA in partnership with Fairfax and Loudoun Counties, as well as the Commonwealth of Virginia.  Phase 2 of the DCMP starts from the Wiehle-Reston East Station and will extend the Silver Line 11.4 miles west into Loudoun County, VA.   It will include six new stations, Reston Town Center, Herndon, Innovation Center, Washington Dulles International Airport, Route 606, and Route 772 Ashburn. Five of the new stations will be built on ground level.  An aerial station will be constructed at Dulles International Airport.


DMY is currently working on this project providing both field and engineering services including geotechnical drilling, rock coring, rock pressuremeter tests and data analysis, borehole logging and field work coordination.  Special challenges include very stringent drilling fluid and siltation control requirements, complex field work coordination with the Design-Builder, MWAA, VDOT and other team members.  DMY, as one of the few geotechnical companies with the expertise of rock pressuremeter testing and data interpretation, successfully performed rock pressuremeter tests in boreholes down to 65 feet deep in challenging geological conditions and obtained valuable data to support the deep foundation design.


Project Location  –  Fairfax and Loudoun Counties, Virginia

Project Owner  –  Metropolitan Washington Airports Authority (MWAA)

Project Client  –  Capital Rail Constructors/Schnabel Engineering

Project Completion  –  2018 (projected)






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Interstate 66 Active Traffic Management

The $38 million project will install an active traffic management system on a 34 miles stretch from I-66 through Arlington, Fairfax and Prince William counties from the Washington, D.C. line to Route 29 in Gainesville.


The system will improve safety and incident management and include new sign gantries, shoulder and lane control signs, speed displays, incident and queue detection, and increased traffic camera coverage. Drivers will see the new overhead sign gantries installed between the Beltway and Route 29 in Centreville.


DMY is currently working on this project to provide QC inspection and testing services during clearing & grubbing, E&S controls, MOT, subgrade preparation, backfill, asphalt, concrete, and foundations.  DMY has provided a QC Manager, QC Coordinator, and several inspectors to ensure the proper compliance of the work with VDOT requirements.


Project Location  –  Various Locations in Northern Virginia

Project Owner  –  Virginia Department of Transportation (VDOT)

Project Client  –  TransCore ITS, LLC

Project Completion  –  2015 (Projected)










DC Water Main Process Train

DC Water recently completed work at the Main Process Train of the Blue Plains Advanced Wastewater Treatment Plant. The design-build project included the rehabilitation of four solids blending tanks, installation of 12 new strain screens in a new screenings building, a pre-dewatering building that houses 10 pre-dewatering centrifuges, four trains of Cambri’s thermal hydrolysis treatment (THP), a digester building including pumping and cooling heat exchangers, and the construction of four 3.8 gallon digesters and associated odor control equipment.


DMY provided construction materials testing and special inspection services. The work included field and laboratory testing for soil and aggregate, concrete and grout sampling testing, and inspection of the installation of 477 auger-cast-piles and 144 drilled piers. This was the first project where DMY implemented DMY Manager®, its web-based electronic management and report system. This system allowed DMY engineers and field staff to efficiently manage the project and effectively control the quality of the deliverables.


Project Location – Washington, DC

Project Owner – DC Water

Project Client – PC Construction/CDM Joint Venture

Project Completion – 2015 (Projected)