About de maximis

Corporate Summary

de maximis has been the leader in providing Environmental Project Management solely to industry for the past 30 years. de maximis provides Project Coordination and Management services to multi-party groups and single party clients involved in environmental projects throughout the United States and in the Caribbean.  Our staff of professional Project Managers has a unique blend of experience in industry, regulatory agencies, remedial contracting and engineering/ environmental consulting.


  • Incorporated in 1988
  • Offices in 11 locations across the country (CA, CT, FL, GA, MA, MI, NJ, PA, TN, TX)


  • 60+ professionals backed by support staff
  • Professional engineers, geologists, hydrogeologists and environmental scientists
  • Up to 35 years of relevant, hands-on management experience
  • Backgrounds from industry, consulting, construction and regulatory agencies

Project/Construction Experience

  • Federal and State Superfund sites (over 100 sites nationwide and in the Caribbean)
  • RCRA site investigation, corrective action and closure
  • State-mandated environmental assessment (e.g. ISRA)
  • Assessment, decommissioning, demolition and closure of industrial facilities
  • Facility acquisition and divestiture programs
  • Remediation of active manufacturing/industrial facilities
  • Voluntary remediation programs
  • Site redevelopment
  • Airport remediation
  • Radionuclide sites
  • Sediment remediation in major waterways, streams, and rivers
  • Operation and Maintenance
  • Fund and Trust Administration