Serving Northern Virgina / Washington DC Metro Area Customers Since 1987

Engineering Services

Our experience makes SES the perfect primary or sub consultant to review reports, plans and designs prepared by other designers, third party inspection of construction projects and obtaining product approvals.

  • Professional Management of Treatment Unit Testing for VDH Approval in Virginia
  • Professional Assessment of existing facilities and recommendations for repair or upgrades
  • Virginia Pollution Abatement Permits for Residential and Commercial Facilities
  • Chesapeake Bay Act Compliance Evaluations and Designs

SES Company


  • Virginia Onsite Wastewater Recycling Association
  • National Onsite Wastewater Recycling Association
  • Water Environment Federation
  • Virginia Association of Counties
  • Northern Virginia Building Industry Association
  • Design Build Institute of America
  • Better Business Bureau
  • Dulles Area Realtors Association
  • Prince William Regional Chamber of Commerce

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Responsible Management Entity

SES is one of only three businesses to be licensed as a Responsible Management Entity. Loudoun County Virginia was the first in the Nation to establish requirements for an RME based on EPA recommendations. SES manages several communities required to have an RME.

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  • Licensed Conventional & Alternative Onsite Soil Evaluators (AOSE)
  • Licensed Conventional and Alternative Onsite Sewage System Operators
  • Licensed Conventional and Alternative Onsite Sewage System Installers
  • NSF Certified Septic System Inspectors
  • Virginia Class A Contractors License
  • Environmental, Monitoring Well and SDS Endorsements
  • Licensed Sewage Handler
  • Licensed Wastewater Treatment Plant Operators
  • Licensed Water System Operators

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