Prepared by the Engineers Joint Contract Documents Committee (EJCDC).

EJCDC® E-564, Agreement between Engineer and Geotechnical Subconsultant for Professional Services, is intended to be used by an engineering firm (“Engineer”) to delegate (subcontract) the geotechnical portion of its contractual obligations under a prime agreement with a Project owner to a geotechnical engineer or geotechnical engineering firm (“Geotechnical Subconsultant”). The document is best suited to delegation in which the prime agreement between Engineer and Owner is based on EJCDC® E-500, Agreement between Owner and Engineer for Professional Services, or on one of the other EJCDC Owner-Engineer agreement forms, but E-564 may also be used when the prime agreement is not an EJCDC-based document.

EJCDC® E-564, Agreement Between Engineer and Geotechnical Subconsultant for Professional Services, 2025 Edition is a comprehensive update of the standard EJCDC professional services subagreement for geotechnical services. The document has been substantially reorganized for consistency with EJCDC’s other professional services agreements and has been updated to include additional practice content and user guidance. E-564 2025 is coordinated with EJCDC® E-500, Agreement Between Owner and Engineer for Professional Services, both in terms of substantive content and structure/organization. To aid the Engineer in managing its subconsultant team and minimize conflicts among the Engineer’s subagreements, E-564 2025 also closely follows EJCDC® E-570, Agreement Between Engineer and Subconsultant for Professional Services, 2020 Edition.

EJCDC includes the American Society of Civil Engineers, the American Council of Engineering Companies, the National Society of Professional Engineers, and the participation of more than fifteen other professional engineering design, construction, owner, legal, and risk management organizations.

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