Meet the amazing
Tansley team

Leading groundbreaking innovation and revolutionizing the natural gas and propane gas odorization industry

People Behind Tansley

Tansley is made up a team of dedicated, experienced and highly qualified professionals that are committed to running with the Tansley mission of creating an environment of continuous improvement within the natural and propane gas odorization industry.

Mark G. Tansley

Mark was born in Edmonton and raised in Calgary. Marks' wealth of industry knowledge began when he spent four years in the production Chemical manufacturing industry (Process Chemicals), which then lead to his 13 years in Oil and Gas Drilling Operations. From there, and with all his experience and entrepreneurial mindset, TAES was created, which is where 26+ years of environmental waste disposal and odorant chemical distribution experiences come from. Mark enjoys the outdoors and is an avid fisher and boatsman. He recently completed his inaugural voyage as captain of a fly fishing drift boat on the Bow River. If he is not paddling down the Bow River, Mark is rocking out with his band, following CrossFit or the University of Alberta women's soccer team.

Senior Operations Manager,
Odorant Division
Chad Marshall

Chad was born in Ontario and moved to Alberta in 1994. He attended the University of Calgary, majoring in Geography. Chad started at TAES as an Environmental Field Technician and moved onto various managerial positions within the company. Chad's current role at TAES is Senior Operations Manager, Odorant Division. Chad is a huge sports fan; if you cannot find him on the golf course or the baseball diamond, he might be off jet setting or spending time with family and friends.

Managing Partner & Sales
Kathleen Tansley

Kathleen is originally from New Brunswick. She has 20 years of sales and customer service experience. At TAES, Kathleen is our Business Development Manager. She handles all things client and customer-related, from new sales opportunities to exceeding customer expectations. Kathleen loves all things Christmas, so don't be surprised if you hear jingle bells in the background when you call. She is also an avid hiker, gardener, and skier and her daughters' number 1 sports fan.

Odorant Supervisor
Jac Leeuwenburgh

Jac has been working for TAES since 2000, originally a senior field supervisor in the environmental field. He took the position of Odorant Supervisor for its flexibility and field-work opportunities. He coordinates the delivery of odorant to clients, works on clean-up jobs, and uphold safety standards. Jac holds a bio-sciences degree from the University of Calgary, and a land resource management diploma from Olds College. Outside of work, he enjoys racing radio-controlled cars on outdoor tracks, camping in the Albertan wilderness, and spending time with his six children.

Finance Manager
Holly Farkes

Holly was born and raised in Alberta. She holds an Accounting degree from the Henderson College of Business and has completed the Petroleum Land Administration program at SAIT Polytechnic. Holly handles all things accounting and has been with TAES for 14 years. One of the largest projects Holly worked on was the merger of two companies (Mark’s father’s business and another environmental company) into what is now TAES. Holly’s favourite part of the job is her fellow TAES employees; everyone is a pleasure to work with. Outside of work, Holly does competitive cattle penning and enjoys hitting the local links.

Safety and Compliance Manager
Luci Tansley

Luci was born and raised in Calgary. Luci completed her Business Degree at Mount Royal University while on a varsity soccer scholarship. After completing her degree, Luci started working at Tansley. Currently, she runs the Tansley NSC safety program as well as our COR health and safety program. Luci’s goal is to not only pass the COR but make it an even better and safer program for all of our staff. When not behind the desk, you might find Luci dirt biking with her two doodles and husband, crushing a PR at Crossfit Culture, trying to get lost in the mountains or starting her Christmas season planning early.

Vice President, Engineering
Dan McCormack P.Eng

Dan was born and raised in Alberta. He is a Professional Engineer with over 30 years of gas utility and upstream Oil and Gas experience. As VP at TAES, Dan brings his extensive experience, imagination, and enthusiasm to the industry and supervises the expanded products and services we supply to the Odorant industry. Outside of work, Dan spends his time with his wife and two kids enjoying hiking, skiing, movies, photography, and eating. He is also an active volunteer in his community. When all of those commitments are done, Dan has also been known to jam with friends, play a few hands of online poker, and spend the odd all-nighter on a video game.

Technical Assistant
Tammy Gowin

Tammy was born and raised in Calgary. She graduated from the Petroleum Engineering Technology program at SAIT. Before TAES, Tammy worked in the Oil & Gas Industry for 22 years. Tammy wears many hats at TAES, including Safety, Human Resources, writing policies, and procedure research. Outside of work, Tammy spends her time with her children and fur babies, horseback riding, and enjoying other outdoor recreational activities.

Warehouse Manager
Allan Peterson

Allan is from Bowden, Alberta, and attended Red Deer College. He has 13 years of oil field service experience. As well as running our Bowden Warehouse, Allan's is in charge of the decommissioning of odorant vessels, Mercaptan deliveries, and bulk deliveries. Allan spends his downtime enjoying the outdoors from camping to fishing and shooting.

Junior Engineer
Camilo Sanchez

Camilo was born in Cuba and moved to Calgary when he was 9 years old. He completed his Chemical Engineering degree at the University of Calgary in June 2020 and is an EIT with APEGA. Previously, Camilo worked at a pipeline company as a Process Safety Intern. He has a safety-driven mindset at work and is always looking for process improvements. Camilo is a Junior Engineer at TAES, working to optimize our operations and provide unique and innovative solutions to problems. Outside of work, Camilo likes spending time with family and friends, enjoying the outdoors, hiking and boating and building model kits. Camilo is fluent in Spanish, and he has a black belt in Tae Kwon Do.

Operations Supervisor
Dave Johnston

Bio coming soon.

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