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Heating  plumbing  air conditioning FUrnaces   BBQ's   propane  ventilating

As your local Lennox and YORK dealer, we're proud to offer the finest heating, cooling and indoor air quality products, with prompt and professional customer service. We have an excellent selection of outdoor grilling systems from top brands, with the best warranties in the business. You can also come to us for propane refills, and have your cylinders re-qualified by our authorized personnel. As for sheet metal, we do custom fabrication in our sheet metal shop and everything from plumbing, electrical and oilfield applications.




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We, Border City Shield Mechanical and Guest Controls, are honored to share a little history with you.
In May 2020 we became the proud new owners of Bob Jack’s' Sheet Metal Ltd. Not only do we have a personal past with the business but Bob Jack's reputation for committed customer service and quality craftsmanship is something we wanted to continue. Our President, Fred, shares, "I was very fortunate as a young adult to be employed by both Mr Roy Noble and Mr Bob Jack Sr.  not only did it give me a familiarity with the industry but also gave me many years around two very well known people in the area who were well known for their work behind the scenes in the community but also the way they conducted themselves in the business community.  I would like to think that although at that age it may not have seemed to sink in.  As you grow older you become more appreciative of the positive people around you and how they carry themselves." 


On March 1, 2023, Border City Shield Mechanical purchased  the assets of Citadel Mechanical and welcomed the owner, Russ Lorenz, and his staff, to the Shield family. Russ and Fred look forward to hearing from and meeting all of the former Citadel customers in the future. We welcome all of the divisions of Citadel, such as plumbing, geothermal, HVAC service, and commercial. 

While Guest Controls is very proud of its roots in oil and gas and very confident in the future of the industry, continuing to grow our HVAC division was an opportunity for the future we couldn't ignore. We are passionate about people and doing great work. Our hope is that when it comes to our services you know that our family is ready to serve yours. 

JOIN THE FAMILY. We have a dedicated team and we appreciate them.
Interested in joining the
Shield Mechanical Ltd. or Guest Controls family? Send us your resume.


Fred Sirett


Fred has been with Guest Controls for 17 years and is a former Bob Jack's Sheet Metal employee. He takes great pride in providing customers with the highest quality of service. Fred's greatest pleasure is being the BEST Dad possible to Lily, Luke, and Ben.

“I am passionate about setting the standard for high-quality work and making my staff feel like family.”


Sheldon Sirett

Operations Manager

Sheldon has been with Guest Controls for 11 years and is a former Bob Jacks Sheet Metal employee. Sheldon lives in Lloydminster with his son Daxton, and is privileged to work under the same roof as his oldest son Wyatt.  ​He believes in committed customer service and craftsmanship.

“This is the Shield Standard”.


Marilyn Glencross

Accounting Manager

Marilyn has been with Guest Controls for 11 years. She grew up in Maidstone and now lives in Lloydminster with her husband Greg and dog Diesel.

“I am happy to be a part of a caring team that treat me like family.”


Tristan Mann

Business Development

Tristan has been with Guest Controls for over 11 years! He grew up on an acreage outside of Raymore, Saskatchewan and moved to Lloydminster in 2005. He and his wife Whitney and have two beautiful daughters, Ayla and Emmi. 

“I truly believe in our mission statement that, “we treat our staff and customers like family”.  


Michelle sirett

Human Resources and Safety

Michelle started with Shield Mechanical and Guest Controls in the summer of 2021.  She lives near Lloydminster, and enjoys anything outdoors.  Michelle is committed to high level customer service, strong communication, and efficient innovation. 

“I am excited for the opportunity to grow professionally with a quality, family-oriented business.”



Visit our showroom and shop for all your BBQ accessories and to see the latest styles from Broil King.  Also offering on site propane bottle fills and exchanges.

Selling, servicing and replacing parts to keep you cookin' is what we do best. There isn't much we can't order upon request including WIFI and Bluetooth pellet grills, charcoal and vertical smokers.

Interested in accessories? We got you covered.




Air Duct


We are your custom ducting specialists. We can repair, design, create and install all customized HVAC systems for residential, commercial and industrial clients. 

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We sell, service and can help you order replace parts on your BBQ. We can order upon requestWIFI and Bluetooth pellet grills and charcoal and vertical smokers and ANY BBQ accessories the customer wants.

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Sheet Metal

Shield Mechanical has a fully operational sheet metal shop to build, design and customize any type of sheet metal and we have all sheet metal applications up to a 16 gauge.



We can help with all your installation, maintenance and repairs for your plumbing systems and fixtures.

From interpreting blueprints to finishing work we can help with everything from residential to commercial plumbing needs.


Electrical Work


Need electrical expertise? We have you covered. Whether it is for residential, industrial or commercial, give us a call to request a quote. From fan and lighting installations to electrical upgrades and circuit breaker replacements, this is just the beginning of how we can help you.

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Guest Controls is a multi-faceted service and supply company operating in the oil and gas industry. We build and supply equipment to the oilfield for combustion, electrical and instrumentation, SCADA, valves, and so much more. Our business is built completely upon customer service, and we pride ourselves on looking after our valued customers. We treat our staff and customers like family.

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Our Office and Showroom

Monday-Friday, 8am-5pm
6320-63rd Ave,
Lloydminster, AB


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Thanks for submitting! We look forward to working with you.

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