On-Call Environmental Geologist

About this Position

Pinyon is seeking on-call Geologists to provide as-needed field support for site characterization and remedial investigation projects across the Denver Metro area and greater Colorado region. This is a self-directed, field-focused role where you’ll serve as Pinyon’s on-site geologic lead during subsurface investigations — logging soils, overseeing drillers and subcontractors, installing and developing monitoring wells, and collecting soil and groundwater samples.

Work is dispatched on an as-needed basis tied to client project schedules. Ideal candidates are experienced field geologists who are comfortable running a drill site independently, managing subcontractors, and producing defensible field documentation without day‑to‑day oversight.

• Perform soil logging and preparation of boring logs in accordance with ASTM D2488 and the Unified Soil Classification System (USCS)
• Oversee drillers and subcontractors during Phase II ESAs, preliminary investigations, remedial investigations, and environmental audits
• Plan and execute monitoring well installation, development, and abandonment
• Conduct soil sampling, groundwater sampling, water level and groundwater gradient surveys, and ground elevation surveys
• Operate and maintain standard environmental field equipment, including photoionization detectors (PIDs), water level meters, water quality meters, multi-gas meters, and survey equipment
• Maintain chain‑of‑custody documentation and coordinate sample submittal to accredited laboratories
• Apply and interpret state and federal environmental regulations relevant to site characterization and remediation
• Communicate effectively with project managers, clients, subcontractors, and regulatory representatives throughout the project lifecycle
• Maintain project documents, field notes, and records in an organized and easily understood fashion
• Some travel within Colorado is required; majority of work is in the Denver Metro area

• Bachelor’s degree in Geology, Geologic Engineering, Geoscience, Environmental Science, Environmental Engineering, or a related field
• Minimum of 4 years of relevant environmental consulting or site characterization experience
• Demonstrated field experience with soil logging (ASTM D2488/USCS), monitoring well installation, and soil and groundwater sampling
• Demonstrated experience overseeing drillers and subcontractors on active field sites
• Ability to work independently on active field sites and respond to on‑call dispatch on short notice
• Capacity to work outdoors in all seasons through various kinds of weather; extended workdays may be required
• Effective verbal and written communication skills
• Basic proficiency with Microsoft Office programs
• Valid driver’s license and reliable transportation to reach field sites throughout Colorado
• Employment is contingent upon the results of a background check

• Wyoming Professional Geologist (PG) registration or equivalent (e.g., AIPG Certified Professional Geologist)
• OSHA 40‑hour HAZWOPER certification with annual refresher (Pinyon will provide recertification if needed)
• Experience with ASTM E1527‑21 and Phase I / Phase II ESA workflows
• Familiarity with state environmental regulations (soil, groundwater, surface water, soil gas, vapor intrusion) in Colorado, Arizona, North Dakota, or Wyoming
• Experience with GPS and field surveying equipment
• Experience with data analysis and visualization in Excel or similar tools
• Familiarity with Colorado asbestos‑in‑soil regulations and RACS oversight procedures

Our on‑call staff are eligible for employer matching 401k, and spot bonus programs.

Pinyon is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to age 40 and over, color, disability, gender identity, genetic information, military or veteran status, national origin, race, religion, sex, sexual orientation or any other applicable status protected by state or local law.