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The Property Sciences team is composed of highly trained professionals with experience in commercial and residential appraisal, appraisal review, quality control procedures, management of information systems, econometrics, real estate investment analysis and urban planning. With years of combined experience and excellent academic training, Property Sciences is uniquely qualified to advise you in your most important real estate collateral decisions.

Douglas A. La Rocca, AG
Douglas A. La Rocca, AG
Chief Appraiser
P:925.246.7324
Doug.Larocca@propsci.com
Douglas A. La Rocca is the Chief Appraiser for Property Sciences. He has over 10 years experience providing valuation and feasibility analysis for various property types including single-family, office, retail, industrial and special use properties. His areas of expertise include self-storage facilities, residential and commercial subdivisions, lodging and hospitality properties, and religious facilities. Mr. La Rocca has also lectured on a vast array of real estate topics and is an accomplished public speaker.

Mr. La Rocca holds the Certified General Real Estate Appraiser License for California and Arizona as well as a California Real Estate Broker’s License. His education includes a Bachelor’s Degree in Psychology and advanced degrees in theology and philosophy. Mr. La Rocca is working towards attaining his MAI designation.
Specializations: Self-Storage, Lodging & Hospitality, Bed & Breakfast, Litigation Support

Russell (Leang) Tiv, AG
Russell (Leang) Tiv, AG
Vice President
P:213.443.4501
Leang.Tiv@propsci.com
Russell (Leang) Tiv is the Vice President and Southern California Manager of the Commercial Division for Property Sciences. Since joining the firm in 1998, Mr. Tiv has held a variety of positions in northern and southern California. His current responsibilities include management, supervision and review of the southern California commercial appraisal team, most of whom he hired and trained. He works closely with large financial institutions and investors to monitor markets, update portfolio risks and execute acquisition and disposition strategies. He has extensive experience analyzing land, subdivisions and master planned communities.

Mr. Tiv holds the Certified General Real Estate Appraiser License for California and Nevada. His education includes a Bachelor’s Degree in Architecture with a minor in City and Regional Planning from the University of California at Berkeley. He is currently an Associate Member of the Appraisal Institute and is working towards attaining his MAI designation.
Specializations: Master Planned Communities, Land, Condominium Developments

Bernard A. Duer, AG
Bernard A. Duer, AG
Vice President
P:925.246.7323
Bernard.Duer@propsci.com
Bernard Duer is the Vice President of the Commercial Division for Property Sciences. He has over 20 years of experience performing appraisals and consulting assignments including valuation and feasibility analysis on a variety of property types, such as office, industrial and retail facilities with emphasis on special use properties including marinas and wineries. Mr. Duer has extensive experience in agricultural valuations including row crop and permanent plantings. He manages the research and data resources of the firm and serves as the Chief Review Appraiser for appraisals performed by companies outside of Property Sciences.

Mr. Duer holds the State of California Certified General Real Estate Appraiser License. His education includes a Master’s Degree in Geography from Columbia University with an emphasis in economic market research and statistical methods applied toward location analysis. He is currently an Associate Member of the Appraisal Institute.
Specializations: Marinas, Wineries & Agricultural Valuations

Dean Huynh, AG
Dean Huynh, AG
Vice President of Appraisal Services
P:925.246.7381
Dean.Huynh@propsci.com
Dean Huynh is the Vice President of Appraisal Services for Property Sciences. He is actively involved in both the Residential and Commercial Divisions. His appraisal experience includes a variety of complex property types including valuations of subdivisions, lodging properties and condominium developments. Mr. Huynh also serves in a managerial capacity and is the company’s project manager of special assets portfolios, pension fund projects and product development. His background includes roles in IT development and project design specifications.

Mr. Huynh holds the Certified General Real Estate Appraiser License for California. His education includes a Bachelor’s Degree in Economics with a Programming Specialization from the University of California at Los Angeles.
Specializations: Special Assets, Portfolio Analysis, Automated Products

Justin Eichman, AG
Justin Eichman, AG
Managing Director
P:925.246.7304
Justin.Eichman@propsci.com
Justin Eichman is the Managing Director of the Commercial Division for Property Sciences. Since joining the firm in 2001, Mr. Eichman has valued a multitude of property types including, retail, office, multi-family, industrial, residential subdivisions and land. His experience also includes partial interests, special use properties, and consulting assignments. His specialties include proposed projects, subdivisions and land within various stages of the entitlement process. In addition to completing appraisal assignments, Mr. Eichman has training, review and final signing responsibility for many complex risk assignments.

Mr. Eichman holds the State of California Certified General Real Estate Appraiser License. His education includes a Bachelor’s Degree in Architecture and a Master’s of Business Administration (MBA) degree with an emphasis in Finance from California Polytechnic State University in San Luis Obispo.
Specializations: Construction Projects, Residential Subdivisions & Land

Luis R. Lorca, AG
Luis R. Lorca, AG
Senior Analyst
P:925.246.7315
Luis.Lorca@propsci.com
Luis R. Lorca is a Senior Analyst within the Commercial Division of Property Sciences. Since joining the firm in 2001, Mr. Lorca has appraised all property types including office, industrial, retail, religious facilities, condominiums, multi-family, affordable housing, nursing homes, restaurants, residential subdivisions, car wash and service station facilities, and agricultural land. His experience also includes partial interests, easement valuation and portfolio assignments. Most recently his practice has been focused on business valuations and litigation support.

Mr. Lorca holds a Certified General Real Estate Appraiser License and Real Estate Broker’s License for the State of California. His education includes a Bachelor’s Degree in International Business from the University of San Francisco and a Master’s of Business Administration (MBA) degree from St. Mary’s College. He is working towards attaining his MAI designation.
Specializations: Litigation Support, Business Valuations, Skilled Nursing Facilities

Tom Mong, AG
Tom Mong, AG
Senior Analyst
P:213.443.4540
Tom.Mong@propsci.com
Tom Mong is a Senior Analyst within the Commercial Division of The Property Sciences Group. Since joining in 2003, Mr. Mong has provided valuation and feasibility analysis for various property types including office, industrial, retail, condominiums, multi-family, restaurants, residential subdivisions, spas and resorts. His experience also includes partial interests, special use properties, business valuations and consulting assignments.

Mr. Mong holds the State of California Certified General Real Estate Appraiser License. His education includes a Bachelor’s Degree in Business Administration with an emphasis in Finance from the California State University of Los Angeles.
Specializations: Multi-family, Retail, Restaurants, Fast Food

Alex Khasin, AG
Alex Khasin, AG
Real Estate Analyst
P:925.246.7336
Alex.Khasin@propsci.com
Alex Khasin is a Real Estate Analyst within the Commercial Division of Property Sciences. He has appraised a wide variety of property types, such as retail, office, industrial, multi-family, service station and car wash facilities. He also has experience performing highest and best use studies, tenant lease and ground lease evaluations, market area sales and rental surveys, and market overviews focusing on rental, capitalization, vacancy and absorption rates for a variety of industries.

Mr. Khasin holds the State of California Certified General Real Estate Appraiser License. His education includes Bachelor’s Degrees in Economics and History from Brandeis University and a Master’s of Business Administration (MBA) degree from California Polytechnic State University in San Luis Obispo. He is currently an Associate Member of the Appraisal Institute and is working towards attaining his MAI designation.
Specializations: Retail Fuel Properties, Owner User Properties, Religious Facilities

Vathana Duong, AG
Vathana Duong, AG
Real Estate Analyst
P:925.246.7386
Vathana.Duong@propsci.com
Vathana Duong is a Real Estate Analyst within the Commercial Division of Property Sciences. He has provided valuation and feasibility analysis for various property types including office, industrial, retail, condominiums, multi-family, and mixed-use properties. His experience also includes feasibility studies, special use properties, portfolio and consulting assignments. His specialties include residential subdivisions, lodging and hospitality properties, and land within various stages of the entitlement process.

Mr. Duong holds the State of California Certified General Real Estate Appraiser License. His education includes a Bachelor’s Degree in Managerial Economics from the University of California at Davis.
Specializations: Mixed Use, Retail, Office