About Us
We bring experience and efficiency to every project, and we strive to build effective, long-term working relationships. We build a responsive team designed specifically for your needs and focused on your requirements. You will always have a regular and trusted point of contact throughout the complete life cycle of your project. Baseline’s staff include environmental engineers, geologists, and environmental scientists.
The Baseline Team
Patrick Sutton
Principal Environmental Engineer, PE
M.S., Civil and Environmental Engineering
Patrick is the Principal of Baseline Environmental Consulting and specializes in the assessment and remediation of hazardous materials released into the environment. He has managed numerous air quality and hazardous materials assessments for transportation, school, and in-fill development projects. His proficiency in a wide range of technical software allows him to thoroughly and efficiently assess and mitigate environmental concerns.
Cem Atabek
Senior Environmental Engineer
B.S., Environmental Engineering
Cem Atabek is an Environmental Engineer with over 15 years of environmental consulting experience. He has managed numerous hazardous materials site assessments, investigations, and remediation, including soil gas mitigation. He also has experience conducting CEQA analyses of hazards and hazardous materials, hydrology and water quality, and geology and soils issues for a wide variety of land-use projects.
Yilin Tian
Project Environmental Engineer
PhD, Environmental Science and Engineering
Yilin is an Environmental Engineer with over 7 years of consulting experience, specializing in air quality, GHG emissions, noise and vibration, and health risk assessments. She has managed and conducted various technical studies for a wide range of land use projects across the Bay Area. Yilin has extensive experience conducting CEQA/NEPA environmental reviews and is proficient with air pollution and noise models, geospatial data analysis, and database management.
Johnathan Rizzo-Mosbaugh
Staff Environmental Scientist
B.S., Environmental Science and Management
Johnathan Rizzo‐Mosbaugh is an Environmental Scientist specializing in Phase I/II environmental site assessments, environmental compliance monitoring, noise monitoring, aerial drone imaging, graphic design, and data management. His experience at Baseline has included collecting soil, groundwater, and soil vapor samples in accordance with regulatory guidelines for projects across the Bay Area.
William Hunsdale
Senior Staff Environmental Scientist
B.S., Environmental Science
William is an Environmental Scientist with experience in hazardous materials mitigation, site characterization, remedial action oversight, and implementation of environmental and stormwater monitoring programs. He has significant experience in the Bay Area, including the preparation of Phase I/II ESAs, Remedial Action Work Plans, and Environmental and Water Quality Monitoring Reports.
Kathy Mertz and Lauren Hendrick
Officer Managers/Accounting
Together, Kathy Mertz and Lauren Hendrick manage and process the company accounting, payroll, human resources, and project contracting. Their duties also include editing and production of all types of technical documents. Kathy received her BA in English from UC Berkeley and Lauren received her BA in Spanish at Dickinson College.
Emeritus Staff
William Scott
Senior Field Geologist, PG, CHg, CEG
B.S., Geology
Bill has been with Baseline for 40 years and has managed field activities for more than 150 groundwater and hazardous waste investigations and remediation projects. He has managed and conducted numerous environmental investigations for soil-gas, soil, and groundwater. Since retiring in 2025, Bill has continued to provide as-needed advisory support, mentoring, and report certification for the Baseline team.
Bruce Abelli-Amen
Senior Hydrogeologist, PG, CHg
M.S., Geology
Bruce has been with Baseline for over 30 years and has been a managing Principal of the firm. He has managed numerous CEQA/NEPA projects, conducted soil and groundwater quality investigations, and overseen remediation programs. Since retiring in 2022, Bruce has continued to provide as-needed advisory support and report certification for the Baseline team.