Slate Geotechnical Consultants Inc.

Slate Geotechnical Consultants Inc., a woman-owned small business based in Oakland, California, provides geotechnical engineering, field investigation, and infrastructure design services to federal agencies as a prime contractor under small-business set-asides. The firm specializes in terrestrial and lunar geotechnical applications, competing across total small business designations and holding a $6 million Indefinite Delivery Contract with the U.S. Army Corps of Engineers (USACE) that runs through August 2028.

Slate's customer base concentrates in civil works and aerospace research. The U.S. Army Corps of Engineers dominates the portfolio, accounting for four awards totaling $6.4 million in combined potential value across both the core $6 million IDC and subordinate delivery orders. The National Aeronautics and Space Administration (via the Shared Services Center) places two awards worth $375 thousand combined, focusing on lunar infrastructure research. USACE Engineering District San Francisco issued one delivery order for $695 thousand on floodplain management work. All six recent awards are prime contracts; Slate does not appear as a subcontractor in the source data.

Slate's work centers on geotechnical investigation and design for water-resources and harbor-infrastructure projects. Representative work includes a $249 thousand delivery order from USACE (September 2023) for geotechnical and environmental services supporting the Oakland Turning Basin Widening Study, a $105 thousand order (September 2024) for cone penetration testing at Bel Marin Keys V in Novato, California, and a $695 thousand delivery order (August 2025) for the Pajaro Floodplain Risk Management Project geomorphology study and subsurface investigations near Watsonville. In aerospace, Slate holds two Small Business Innovation Research (SBIR) Phase I awards from the Shared Services Center: a $150 thousand contract (August 2024) for foundation design and seismic protection of lunar infrastructure utilizing bulk regolith, and a $225 thousand contract (September 2026) for STTR Phase I landing pad design for a lunar innovation park. Both aerospace contracts reflect the firm's expansion beyond terrestrial geotechnical work into specialized structural and geotechnical engineering for extraterrestrial applications.

Activity remains light and episodic—two awards per year in 2023 and 2024, then one per year in 2025 and 2026—with combined potential value of $7.4 million across all six awards and only $1.3 million obligated to date (18% of potential value). Two awards face ultimate completion within the next twenty-four months, carrying combined potential value of $920 thousand and representing near-term recompete exposure. Work is performed at the firm's facilities in Piedmont and Oakland, California. Slate appears in the Service Contract Inventory as a named subcontractor on one record in FY2024, contributing 3.1 FTEs, though this represents a single data point and does not characterize the firm's typical teaming posture on its prime contracts.