Corporate Team

R. Ashton Rowles

MAI, MRICS, President

R. Ashton Rowles, MAI, MRICS is currently a Senior Director for Archstone Appraisal Group, LLC and head of the executive team. Ashton started Archstone in 2017 after 12 years with Colliers international, where most recently, he served as Executive Managing Director Valuation over Latin American.

Ashton also previously worked for the U.S. Department of State as a Senior Real Estate Appraiser, assisting with valuation-related matters for acquisition and disposal for the U.S. Government’s International Real Estate holdings.

Ashton has personally performed appraisals in 40 states and 22 countries. He has overseen and reviewed appraisals in over 40 countries. He has been involved in numerous fields within real estate valuation, including: single asset valuation, Portfolio valuation, market analysis, feasibility studies, lease and cost analysis, highest and best use analysis, rent analysis, eminent domain, litigation support, insurance valuation, foreclosure and bankruptcy support, and tax mitigation.

Adriana Gastelumendi

Finance and Accounting

Adriana is a dual American-Peruvian citizen currently residing in Peru. Following her studies in Business Administration Adriana moved to the United States where she excelled in the hospitality industry: she worked in multiple managerial positions for the Peninsula Hotel, one of the United States’ pre-eminent five-star hotels. Adriana is fluent in English and Spanish and has continually increased her knowledge of business administration in a variety of different environments and positions, both in the United States and in Peru.

Ericka Simmons

Chief of Operations

Real estate professional with experience in real estate private equity, valuation and finance; model development, green improvements and energy analysis and sustainable building training. Specific knowledge of the Mid-Atlantic and NYC metro areas.

Benjamin Greenberg

Operations and Marketing

Previously Manager of Mexico City office for Deloitte and Duff & Phelps. National Marketing Director for Archstone Appraisal Group

Bruce Greenberg

Managing Director

Bruce D. Greenberg, FRICS/RICS Registered Valuer, MAI/SRA, ASN ARM Real Property and Machinery & Equipment is the Managing Director of Archstone Group in Tucson, Arizona and former Managing Director of Duff & Phelps Mexico, Deloitte’s Mexico Real Estate Advisory Services and Valbridge Arizona. Bruce originally was the President and Owner of Montana Verde Consultores y Valuadores S.R.L. de C.V (Founded in 1998) and Bruce D. Greenberg Inc. (Founded in 1981).

Mr. Greenberg is a registered Perito with the lnstituto de Administraci6n y Avaluos de Bienes Nacionales (INDAABIN). Mr. Greenberg was the lead advisor to INDAABIN, Mexico’s federal agency in charge of the administration and valuation of all public properties, in adapting International Valuation Standards as a mandatory requirement for all federal government assets. This organization is in charge of determining, leading the planning, the policy and administration of all federal Real Estate and Personal Property assets and appraisals.

Over the past 45 years, Mr. Greenberg has established relationships with leading real estate lenders, agencies, developers, governmental officials and has performed more than 20,000 valuation and/or consulting assignments in about 20 nations throughout the North and Latin America and the Caribbean. After completed his first assignment in Mexico in 1997, he has since performed nearly 3,500 assignments encompassing more than 7,500 properties throughout North and Latin America and the Caribbean in various real estate matters in the commercial, industrial, residential, touristic and hospitality real estate sectors. These relationships are crucial in order to gather reliable and sufficient data to competently meet the needs and standards of the various real estate industries.

Michael L. Miller

MAI, Managing Partner

Mr. Miller is an MAI designated appraiser and a managing partner in Property Analytix. Mr. Miller has been involved in the appraisal and consultation of real estate and going concerns for over 30 years. Previously, he was a Senior Managing Director who started Grubb & Ellis Landauer Valuation Advisory Services appraisal platform; Senior Director, with Cushman & Wakefield of Arizona and Texas for 17 years and with CBCommercial Real Estate Group, Inc. (CBRE)as an Assistant Vice President for 10 years.
Mr. Miller has extensive experience testifying in courts and arbitrations relating to real estate partnership conflicts, property values and market occurrences. Mr. Miller has briefed major banks, investment advisors, private developers, presidents of foreign countries, governors and local development offices on real estate development within their respective countries on targeted investment regions.

Ryan P. Lin

MAI, Managing Partner

Mr. Lin is a designated appraiser and a managing partner in Property Analytix. Mr. Lin has been involved in the appraisal and consultation of real estate and going concerns for over 14 years. Previously, he was a Managing Director in National Appraisal Partners and the Director of Valuation in O’Connor & Associates.
Mr. Lin is a leading master-planned community consultant, providing land use profiles, density studies, marketing comparisons and structures, feasibility analysis, and appraisal reports for some of the highest profile resort/destination mater-planned communities. Mr. Lin has completed commercial real estate appraisals in over 10 states and has also appraised numerous international assets. In 2018, Mr. Lin developed the first cloud-based commercial appraisal report-writing system with a live data feed.


Advisory Team

Ashton Rowles

MAI, MRICS, Boise, Idaho and Special Projects

Ericka Simmons

Washington DC Director, Affordable Housing, Global Benchmarking

Mark Savage

MAI, New England Director & Latin America

Richard Cornogg

MAI, Pennsylvania and Agriculture

Joe Consoli

MAI, Baltimore and Transit Oriented Developments

Michael Chaffee

Virginia, Litigation Support, and Self Storage

Aaron Anderson

Denver, Affordable Housing, and Going Concern

Timothy Moore

Denver, Subdivision and Commercial

CK Yang

Asia, Highest and Best Use, Hospitality, International Funds

Daniel Kennedy

Appraisal Trainee, International Research, Technology Support


Affilliate Advisors

Daniel Jackel

MAI, MRICS, Hospitality, Cashflow, Complex Consulting, Sao Paulo, Brazil

Mariano Carruzo

Buenos Aires SFC Hospitality Worldwide

George Mann

MAI, CRE – Senior Reviewer and Quality Control

Jim Jeffrey

Mintwood Investors, project manager, development, lending

Jerry Clawson

Azure Waterfront Properties – International Due Diligence and Mortgage brokerage

Curvin Leatham

Area Probe – CEO