Sr. Geologist/Hydrogeologist

Oneida ESC Group; California (MO); Hybrid; USD 120,000 - 190,000; Part time

Job summary

Oneida ESC Group, a family of companies delivering customer-focused engineering, science, and construction services worldwide, has an opening for a Part Time Senior Geologist/Hydrogeologist to support a wide range of projects nationwide. Office or Remote; Hybrid preferred, with California work possibilities.

The role emphasizes technical leadership in soil and groundwater characterization and remediation, development of conceptual site models, mentoring junior staff, and regulatory oversight

Qualifications

• 20+ years of experience in environmental site characterization and remediation.
• California state certification/licensing as a PG is required.
• Experience with large-scale, complex environmental sites involving hazardous and mixed wastes.
• Knowledge of fate and transport of VOCs including chlorinated solvents, petroleum compounds, metals, radioactive, and emerging contaminants.
• Proficiency in MS Word, PowerPoint and Excel; excellent writing and communication skills.

Responsibilities

• Serve as technical lead or PM on complex environmental sites nationwide, including soil and groundwater remediation.
• Develop conceptual site models; plan site characterization and remedial designs; ensure data sufficiency for evaluations.
• Lead planning, cost estimating, and schedule control; oversee deliverables and budgets.
• Interact with internal and external customers on regulatory and project scope, schedule, and budget.
• Provide expert consulting and mentoring to junior staff; supervise multidisciplinary teams.
• Support regulatory oversight under CERCLA, RCRA, CWA; review and edit technical/regulatory reports.
• Contribute to proposals and client relations.

Skills

Technical leadership

Regulatory knowledge

Communication skills

Project management

Mentoring

Data analysis

Education

MS in environmental science

CHG certification

Tools

Microsoft Word

PowerPoint

Excel

Job description

Oneida ESC Group delivers full-service facility and infrastructure engineering design, environmental science, construction management, and munitions response services worldwide, with over 25 years of successful project performance. OTIE has an opening for a Part Time Senior Geologist/Hydrogeologist (Office or Remote; Hybrid preferred) to provide a wide range of project support for a diversity of projects and clients nationwide.

Duties and Responsibilities:

• Serve as a technical lead and/or technical/project manager supporting large and complex environmental project sites involving soil and groundwater remediation in California and nationwide.
• As technical lead: develop conceptual site models; formulate problem statements and project objectives; develop site characterization plans, consult on remedial designs/optimization, ensure data sufficiency and quality for technical evaluations; perform data evaluations including analytical, mathematical, and modeling approaches; prepare technical reports.
• As project/technical manager, provide leadership and oversight of planning, project team activities and progress, deliverable quality, cost estimating, and cost and schedule control.
• Interact with internal and external customers on technical, regulatory, and project scope/schedule/budget.
• Provide expert-level consulting and problem-solving with internal and external customers and stakeholders.
• Perform technical reviews, support regulatory oversight under CERCLA, RCRA, CWA, State of California regulations.
• Foster collaborative and productive work relationships including mentoring and training of junior and mid-level staff, organize and coordinate technical teams comprised of diverse disciplines, and catalyze a positive, collaborative, and productive work environment.

Requirements

Minimum Qualifications:

• 20+ years of experience in environmental site characterization and remediation under CERCLA and state regulatory frameworks.
• California state certification/licensing as a PG is required.
• Experience with managing and providing technical oversight of large-scale and complex environmental sites involving hazardous and mixed wastes, free-phase product, etc.
• Knowledgeable of fate and transport processes of VOCs including chlorinated solvents, petroleum compounds, metals, radioactive, and emerging contaminants in unconsolidated and bedrock geologic settings.
• Experience and in-depth knowledge of groundwater, soil, and soil vapor characterization and remedial techniques and technologies.
• Experience and familiarity with CERCLA, RCRA, TSCA, SDWA and various DoD branch (i.e., USACE, Navy, U.S. Air Force) regulations and reporting requirements a plus.
• Experience in reviewing and editing technical writing and regulatory reports.
• Previous involvement in preparing or contributing to project proposals and managing project budgets
• Proficiency in Microsoft Word, Power Point and Excel
• Excellent writing and communication skills.
• Experienced working under a variety of government and private customer contracts.

Preferred Qualifications:

• M.S. in environmental science or related
• Professional Certified Hydrogeologist (CHG)
• Experience with investigating soil and groundwater contaminated with PFAS/PFOA compounds.

About Us:

The Oneida ESC Group is a family of companies owned by the Oneida Nation of Wisconsin that delivers customer-focused engineering, science, and construction services worldwide.

Our family of companies includes:

• Oneida Total Integrated Enterprises (OTIE)
• Mission Support Services (MS2)
• Sustainment & Restoration Services (SRS)
• Oneida Engineering Solutions (OES)
• General Mechanical Corporation (GMC)
• LG2 Environmental Solutions (LG2)

We integrate our staff for dedicated, cooperative, and business‑like delivery of services to enhance our customers’ missions.

Oneida ESC Group is an equal opportunity employer committed to inclusion and diversity in the workplace. We take affirmative action to ensure equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws, national origin, disability, veteran status, or other legally protected characteristics.

Oneida ESC Group is committed to working with and providing reasonable accommodation to applicants with physical and mental disabilities.

This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training. Oneida ESC Group makes hiring decisions based solely on qualifications, merit, and business needs at the time.