Toronto is the headquarters office of RPA. The company was formed as an Ontario Corporation on October 10, 1984 by William Roscoe and John Postle. This is also RPA’s largest office with more than 30 employees.

The Toronto office serves clients worldwide with geology and mining services and is well known for its mineral resource and mineral reserve estimates.

Its staff also provides business and financial advice to banks, capital management, and investment firms on due diligence and evaluation of mining properties and projects in all parts of the world.

Senior management of the office serve on advisory boards and organizations assisting in the leadership and development of the mining industry.

Every year, RPA attends and exhibits at the PDAC Convention, Trade Show and Investors’ Exchange in March. Be sure and visit us at our Booth.

Learn more about Toronto activities at our News Centre

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Since 1998, RPA has maintained an active office in Vancouver, British Columbia. The Vancouver office serves clients in Western Canada, Alaska and throughout the Americas. Its staff represents all the disciplines of geology and mining.

All of RPA’s offices have an active community relations and stewardship program, providing matching grants to employees in their charitable activities and giving.

Each year in January the mining industry focuses on Vancouver where the Mineral Exploration Roundup takes place in late January. Founded by the BC Association for Mineral Exploration, the Roundup is the premiere exploration conference and RPA participates through attendance and exhibiting.

Learn more about Vancouver activities at our News Centre



The Québec office of RPA opened in 2011 with a multilingual staff to serve North American clients, particularly those in French-speaking Québec. Its staff also provides full mining engineering and geological services to clients in France and French-speaking countries of Africa, Asia, and Latin America.

Learn more about Québec City activities at our News Centre


The Denver office of RPA opened in 2009. It serves regional and local clients of this mining hub of the U.S. as well as providing geological, mining, and metallurgical expertise to global clients.

Learn more about Denver activities at our News Centre

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RPA’s newest office opened in 2011 to focus on clients in the mining and financial centre of London,  Europe, Asia, the Middle East and Africa.  Mr. Ian Blakley joined the office in 2012 as Vice President, General Manager—UK Operations.

From the London City office, RPA is well-situated to assist mining investors with technical due diligence, mineral resource and mineral reserve estimation and audits, mineral property valuations, and compliant technical reporting. 

Learn more about London activities at our News Centre

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