Who We Are

Questor is a public, international environmental Cleantech company founded in late 1994 and headquartered in Calgary, Alberta, with field offices across North America. Questor designs, manufactures and services high efficiency waste gas combustion systems; as well as, power generation systems and water treatment solutions utilizing waste heat. We are focused on clean air technologies that safely and cost effectively improve air quality, support energy efficiency and greenhouse gas emission reductions

     Our proprietary incinerator technology is utilized worldwide in the effective management of methane, hydrogen sulphide gas, volatile organic hydrocarbons, hazardous air pollutants and BTEX gases ensuring sustainable development, community acceptance and regulatory compliance.

     Questor and its subsidiary, ClearPower Systems are providing solutions for landfill biogas, syngas, waste engine exhaust, geothermal and solar, cement plant waste heat in addition to a wide variety of projects across the globe,

     With a focus on solid engineering design, our products enable our clients to operate cost effectively in an environmentally responsible and sustainable manner.

Ensuring Safety

We pride ourselves in the knowledge that our incinerator systems have been designed with safety as a priority. Questor Technology Inc. is committed to the safety of our employees, customers and the environment.

Practicing Innovation

Questor is committed to the continuous development of value-added solutions.

Fostering Trust

At Questor, we believe honesty, integrity and fairness form the basis of the relationship with our clients.

Pursuing Excellence

Questor’s commitment to engineering excellence ensures superior products and maximized efficiency.



Audrey Mascarenhas

M. Eng, President & CEO

Ms. Audrey Mascarenhas the President and CEO of Questor Technology Inc. Audrey joined Questor in 1999. Prior to this, Audrey worked in the oil and gas industry during a 17-year tenure with Gulf Canada Resources Ltd., presently Conoco-Phillips. She is a graduate of the University of Toronto in Chemical Engineering and holds a Masters Degree in Petroleum Engineering from the University of Calgary.

Lori Wright

Executive Assistant to Audrey Mascarenhas

John Sutherland

P. Eng, Chief Operating Officer

Mr. Sutherland is a mechanical engineer with over 25 years of experience gained at multi-national corporations, the Alberta Energy Regulator and as a consulting engineer on various projects in the area of oil and natural gas exploration and production. He has designed and built facilities with a deep focus on all aspects of environment, health and safety in the process.


Dan Zivkusic

CPA, CMA, Chief Financial Officer

Mr. Zivkusic is a multi-disciplined professional with over 20 years of oil and gas industry experience.  Most recently he served as CFO for Reform Energy Services Corp., a private international company specializing in under balanced drilling, managed pressure drilling and production testing/flowback business.

Dan obtained his Certified Management Accountant designation in 1991 and is an active member of the Chartered Professional Accounts of Alberta.

Justin Mahendra​

BSc, Vice President, Sales & Marketing

Mr. Mahendra has over 18 years of Technical Sales and Sales Management experience. This includes 7 years in the Pharmaceutical Waste industry within the UK and Europe and more recently for the past 9 years in the North American resource sector. Justin holds a BSC in Sociology and Psychology from the University of Wales

sales & marketing

Dave Das

Director of Marketing


Engineering & Operations

Jeff Nelson

P. Eng, Engineering Manager


Mike Rogne

Operations Coordinator

Justin Bouchard

Design Engineer

Ryan Wisener

Design Engineer

Tristin Barrett


Ben Vriends

Senior Technician

Albert Smith


Lance Speck

Field Technician

Levi Johnson

Field Technician

Carly Riehl

Administrative Assistant

Noemi Soria

Accounting & Administrative Assistant


Questor is committed to conducting its business in a manner that delivers leading environmental, health and safety performance. This is consistent with our commitment to corporate citizenship, social responsibility, and sustainability.

Our goals are to provide products and services that are safe and environmentally sound throughout their lifecycles, conduct our operations in an environmentally responsible manner, and create health and safety practices and work environments that enable Questor employees to work injury-free.To accomplish this, we will:

To accomplish this, we will:

  • Meet or exceed all applicable legal requirements;
  • Proactively reduce occupational injury and illness risks, and promote employee health and well-being;
  • Aggressively pursue pollution prevention, resource conservation and waste reduction in our operations;
  • Design and manufacture our products to be safe to use and to minimize their environmental impact;
  • Seek to be an industry leader in not only meeting but exceeding current compliance regulations;
  • Require our suppliers to conduct their operations in a socially and environmentally responsible manner.

We achieve this high level of performance by integrating these objectives into our business planning, decision-making, performance tracking and governance processes to ensure we achieve and continually improve upon our goals.

Each employee has an individual responsibility to understand and support our environmental, health and safety policies and to actively participate in programs to ensure our goals are achieved.

We believe our company must work with employees, suppliers, partners, customers, and governmental, non-governmental and community organizations to protect and enhance health, safety and the environment. We foster open dialogue with our stakeholders to share relevant information and contribute to the development of sound public policy and business initiatives.