Martin R. Derus, President

Mr. Derus has professional experience as a Project Manager, Senior Environmental Analyst, and Meteorologist since 1976. As President of Lilburn Corporation, he is responsible for project management, client and agency liaison, quality assurance, technical analysis, and report preparation. He has prepared numerous Environmental Impact Statements and Reports, Environmental Assessments, Initial Studies, and Mine Reclamation Plans. His expertise lies in the permitting of new or expanded mine sites, obtaining site approvals, preparing reclamation plans, and providing condition compliance consultation. Mr. Derus holds a B.S. degree in Meteorology from San Jose State University. 


Cheryl A. Tubbs, Vice President

Ms. Tubbs’ professional experience since 1977 has been in environmental and water resources planning, and public utility administration. Her project experience includes the preparation and management of environmental impact reports and assessments in compliance with CEQA and NEPA, land use feasibility studies, groundwater and surface water supply studies, solid waste and public facilities plans, urban water management and conservation plans, and public information programs. She has participated in and managed numerous EIRs for residential, commercial, transportation, landfill, water supply, wastewater treatment, recreational, mining, and industrial projects. She holds a M.B.A. in Operations Management and a B.A. in Geography from California State University, San Bernardino.

Cheryl A. Tubbs on LinkedIn

Steven A. Kupferman, Principal Geologist

Mr. Kupferman has over 40 years of professional experience as a geologist providing technical expertise to the mining/reclamation industry as well as performing engineering geologic and groundwater investigations.  He spent 13 years with the U.S. Bureau of Land Management, and 14 years as the Riverside County Geologist where he was the mine-permitting SMARA lead, and reviewed and approved all fault hazard, liquefaction, landslide and related geo-environmental reports involving engineering geology, contamination, groundwater and geotechnical engineering issues for development projects, including residential, commercial/industrial, infrastructure, landfills and dam projects.  Mr. Kupferman’s experience also includes work for mining companies where he was responsible for mining operations, production, maintenance, budget, mine planning, reserve estimation, and permitting.  As Lilburn Corporation’s Principal Geologist, Mr. Kupferman is responsible for providing technical expertise in mineral resource development, mineral appraisals, mine permitting/reclamation, engineering geology, hydrogeology, and federal and State mining law.  He is responsible for the preparation of NEPA and CEQA documents for mining and energy development projects. Mr. Kupferman holds a B.A. in Geology from California State University, Fullerton and is a California Professional Geologist, California Certified Engineering Geologist, California Certified Hydrogeologist, Certified Professional Geologist, and a BLM Certified Mineral Examiner.

Natalie P. Patty, Project Manager/Environmental Analyst

Ms. Patty has extensive experience in land use permitting, current planning, environmental compliance, and solid waste planning since 1996. She has managed and prepared Initial Studies in compliance with CEQA for a variety of residential, commercial, industrial, health care, educational, and public works projects. She has also managed Environmental Impact Reports for major commercial development and health care facility projects. She has been responsible for the preparation of Staff Reports, Resolutions, and LAFCO Application Packages for major residential development annexations and has provided on-site planning counter services and project environmental reviews for the cities of Big Bear Lake, Loma Linda and Rancho Cucamonga, and the Town of Apple Valley. Ms. Patty has a B.S. in Environmental Science from the University of California at Riverside.

Natalie P. Patty on LinkedIn

Frank Amendola, Project Manager, Mining/Environmental Compliance Analyst

Mr. Amendola has experience in compliance with the California Environmental Quality Act (CEQA), Surface Mining and Reclamation Act (SMARA), CUPA Business Emergency and Contingency Plan, and other environmental regulations. He is experienced in evaluating project impacts using air quality models such as CalEEMod. Mr. Amendola has performed environmental analyses in compliance with CEQA for a number of residential, commercial, industrial, and public works projects. He assists in mine development and permitting, as well as annual inspections and reporting. Mr. Amendola has prepared Phase I Site Assessments for numerous property acquisitions in Riverside and San Bernardino counties. He holds a Masters in Business Administration from California Baptist University and a B.S. in Health Science with an Environmental Health Concentration from California State University, San Bernardino. 

Frank Amendola on LinkedIn

Lorraine Bueno, Environmental Analyst/Regulatory Compliance Specialist

Ms. Bueno has been with Lilburn Corporation since 2011.  She completed a degree in Environmental Systems at UC San Diego in 2010.  Her professional experience includes biological resources studies, regulatory permitting, CEQA and NEPA document preparation, and site monitoring for environmental compliance. She assists senior staff in the field, conducts data collection, prepares reports and permit applications, and coordinates permitting with regulatory agencies. Her permitting experience includes preparing applications for 401 Certifications, 404 Nationwide and Individual Permits, and CDFW Section 1602 Streambed Alteration Agreements. She is experienced in working with local, State, and federal agency staff. In 2013, Ms. Bueno completed the 40-hour Wetland Delineator Certification Program based on the U.S. Army Corps of Engineers Wetland Delineation Manual Technical Report Y-87-1.


Troy Goodwalt, Senior Environmental Designer

Mr. Goodwalt has over 27 years of experience as a trained Civil and Environmental Designer by respected engineering companies throughout California. In addition to designing and permitting over 60 mine sites, he provides a full complement of modern civil, environmental and GIS computer skills necessary to analyze, design and permit private and commercial developments as well as provide conceptual site design plans, three-dimensional modeling for underground toxic plumes, innovative 3D terrain visualization, precise GIS analysis, GIS database creation, and visual simulations and animated “fly-throughs” for sensitive land development projects. A cooperative history of relationships with public agencies include, but not limited to, BLM, CDFG, USFS, NPS and numerous City, County and State agencies. He holds an A.S. degree from Riverside Community College.