Senior Advisor, Hydrogeology

Langan provides expert land development engineering and environmental consulting services for major developers, renewable energy producers, energy companies, corporations, healthcare systems, colleges/universities, and large infrastructure programs throughout the U.S. and around the world. Our employees collaborate seamlessly among 40+ offices and gain valuable hands-on experience that fosters career growth. Langan culture is entrepreneurial from advancing innovative technical solutions, to participating in robust training and knowledge sharing, to making progressive change within the communities we live and work.

 

Consistently ranked among the top ten “Best Firms to Work For” and Engineering News-Record’s top 50 firms worldwide, Langan attracts and retains the best talent in the industry. Employees thrive at Langan, a firm that fosters an inclusive and supportive work environment for all; prioritizes wellbeing, health, and safety; encourages volunteerism and philanthropy; offers workplace flexibility, along with carbon-neutral office spaces; and empowers individuals to contribute their skills and knowledge to make impactful contributions.

 

Job Summary

 

Langan is seeking a Senior Advisor, Hydrogeology, in San Francisco, CA to support complex groundwater modeling, hydrogeologic analysis, and environmnetal consulting projects. This part-time role is designed for a technical specialist to provide expertise in hydrogeology and groundwater modeling while providing leadership, technical oversight, and quality control across multidisciplinary project teams. 

 

Job Responsibilities

 

• Lead the development, calibration, and interpretation of groundwater flow and contaminant transport models (MODFLOW, MT3D, SEAWAT, FEHM, or equivalent);
• Conduct advanced hydrogeologic assessments, including aquifer characterization, pumping test analysis, geostatistical evaluations, and water balance studies;
• Provide senior-level review of hydrogeologic work products, ensuring technical excellence and regulatory compliance;
• Support complex remedial investigations and feasibility studies with modeling insights, predictive simulations, and sensitivity analyses;
• Prepare high-quality technical reports, memoranda, and presentations for internal teams and clients;
• Serve as a technical lead on mid-to-large scale environmnetal and water resource projects;
• Guide junior staff in modeling techniques, hydrogeologic methods, data interpretation, and best practices;
• Collaborate with environmental engineers, geologists, and project managers across offices to deliver integrated solutions;
• Participate in client meetings to explain modeling methodologies and results in a clear, confident, and accessible manner;
• Develop or refine modeling tools, workflows, and QA/QC procedures;
• Stay current with emerging groundwater modeling software, regulatory requirements, and industry trends;
• Offer strategic input during proposal development and project scoping, particularly for technically advanced subsurface modeling needs.

 

Qualifications

 

• Bachelor’s degree in Geology, Hydrogeology, Environmental Engineering, Environmental Science, or related:
• Professional licensure required;
• 10 to 15+ years of related work experience;
• In-depth knowledge and understanding of local, state and federal regulations
• 40-hour OSHA HAZWOPER certification;
• Proficiency in environmental due diligence;
• Knowledge of quantitative/technical analyses and related software. Demonstrated ability to perform quantitative and technical analyses;
• Comprehensive understanding of regulatory requirements;
• Excellent public speaking, written, and verbal communication skills;
• Strong attention to detail with excellent analytical and judgment capabilities;
• Ability to effectively work independently and in a team environment;
• Ability to multi-task effectively, manage multiple projects and clients, develop and man