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management team

Mark Trevisiol , , , Site Manager

Mark Trevisiol is a professional engineer and has been in the mining & processing business for over 25 years. Most of his career was with Falconbridge Ltd (18 years). Mark joined Falconbridge in 1988 and spent most of his career in operations management having been Operating and Maintenance Superintendent of Sudbury Nickel Smelter as well as Operating Superintendent of the Kidd Creek Metallurgical Facility (Zinc Plant) in Timmins, Ontario. His last role while with Falconbridge was General Manager of the Sudbury Smelter Business Unit. Mark worked 2 years with Xstrata Nickel (2006 to 2008) as its General Manager of Business Development. Mark became President and CEO of Crowflight Minerals from 2009 to 2011, Crowflight’s main operation being a 1500 tonne per day Mine and Mill in northern Manitoba. Mark joined Silver Bear Resources in 2011 and was its President and CEO until November 2014, he is past President of Auger Resources and former director of Goldstar Minerals. He is also an associate of KCB Inc a Canadian based management consulting group. Mark has been a director on 4 public companies and holds an engineering degree from the University of Waterloo (1985). He has been Site Manager for Northern Sun Mining since 2014.

Tony Leggett , , , Technical Superintendent

Tony Leggett is a registered professional engineer with 25 years of industrial metallurgical experience. Tony graduated with a Bachelors Degree in Chemical Engineering from the University of Auckland in New Zealand and a Masters Degree in Extractive Metallurgy from the University of Melbourne. Tony spent 15 years at the Kidd Metallurgical Site (Xstrata) in Timmins, Ontario working in progressively senior technical, project and operations roles in the copper and zinc processing plants. Following that, he spent four years with Goldcorp at the Porcupine Mill in Timmins, Ontario leading the metallurgical and operations groups. Since September 2017, Tony has been employed as the Technical Superintendent for Northern Sun Mining overseeing all aspects of metallurgical processing, feed evaluation and project development.

Tim Doskotch , , , Maintenance Superintendent

Tim Doskotch is currently Maintenance Superintendent at Northern Sun's Redstone Mill in Timmins. Tim is a graduate from Cambrian College where he received the Canadian Scholarship for Science and Technology and graduated as an Instrumentation Technologist. Tim's 9 years of mining and metal processing experience came partly from his 2 years spent at the Kidd Creek Metallurgical facility in Timmins, Ontario. There he focused mainly on the instrumentation and control aspects of the processing facilities. He furthered his mining and metal processing experience with 3 years spent at Liberty Mines (2010-2013). Earlier in his career he worked with Siemens in Ottawa (1998-2001) where he serviced such clients as Nortel Networks. From 2001-2003 he worked for Nortel Networks where he worked on Waste Water treatment systems, Toxic gas monitoring systems and Ultra-Pure Water purification plants. Tim also worked with Johnson Controls as an automation technologist from 2003-2008.

Tim also holds an Interprovincial Red Seal trades classification for both Instrumentation and Electrical, something few technical personnel have within the industry. Tim joined Northern Sun as an Electrical/Instrumentation Leader and later was promoted to Supervisor and then to Superintendent.

Tim is originally from the Timmins area and has been with Northern Sun since 2014.

Todd Mathieu , , , Project Geology Technician/IT & Acting Environmental Representative

Todd Mathieu has been employed with Northern Sun Mining since March 2010. With over 25 years of technical, geological, geophysical experience, Todd has been involved in several exploration, delineation, to mining stage projects. With a strong technical background in systems analysis, data management, GIS, 3D modeling, and user/network support, Todd has gone on to support several NSM departments including Geology, Environmental, Mine Engineering, and IT Services. Todd led the discovery of the MATHU Deposit, a new Ni, Cu, Co, and TPM discovery in Groves Township in 2015/2016. Todd’s interpretation and deep VTEM targeting at the Hart Deposit in 2011 lead to the discovery of additional nickel mineralization 540 meters below surface and below/opposite a gabbroic dyke that truncated the known Hart Deposit. Todd is also credited with the discovery of the Y Vein on the Owaissa Property (Au, Ag, Co, Cu,) in 2007.

Sarah Marazzo , , , Human Resources Coordinator

Sarah Marazzo has an Ontario College advanced diploma in Business Administration – Human Resources Management from Northern College in Timmins, Ontario. Originally from the north, she is pleased to have established her career in Timmins. Sarah joined the Northern Sun Mining team in June 2014 as the Human Resources Coordinator. Since starting with Northern Sun, Sarah has developed a core understanding of Human Resources Management in the mining industry and has become proficient in implementing and adhering to government and industry standards in Human Resources policies. In addition to her Human Resources role, Sarah assists with accounting, purchasing and payroll.

contact information


130 Adelaide St. W, Suite 3420
Toronto, ON
M5H 3P5
Phone: 647-494-3814
Fax: 647-494-3880
Email: info@northernsunmining.ca


Box 5114
South Porcupine, ON
P0N 1H0
Phone: 750 240 6450
Fax: 705 240 6451