Jun has been in the construction industry for more than 20 years. With proven experience in the civil engineering and grouting fields, his understanding of specialty techniques has helped him to resolve unexpected technical difficulties and customer grouting challenges for projects in commercial, industrial, utility, heavy civil, tunneling and the mining sector.
Jun has a demonstrated ability to adapt specialty grouting techniques and equipment to accommodate confined space, extreme weather, remote location and other difficult or unusual site conditions.
He is a skilled grouting specialist, committed to delivering high quality work and first class technical services to our customers.
Work History
2003 to date |
Multiurethanes Ltd. - Mississauga, ON |
2001 – 2003 |
Employed in the manufacturing sector - Mississauga, ON |
1993 – 2001 |
Civil Engineer employed by several construction and engineering companies - Philippines |
Jun Leyson Resume - Technical Specialist
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Technical Skills
Diversified hands-on expertise in specialty grouting solutions for the control of water inflows, restoration of concrete structures, crack injection, annular space grouting and void filling
Advanced knowledge of grout material selection including grout formulations and the use of additives
Demonstrated ability to adapt specialty grouting techniques and equipment to accommodate confined space, extreme weather, remote location and other difficult or unusual site conditions
Training and supervision of contractor personnel for concrete repair and water control applications
Compliant with NORCAT training standards and job site specific safety procedures
Specialties
Solutions for high volume, high-pressure, high-temperature water inflows
Hands on direction and site supervision for highly technical grouting operations
Water control for underground mines
Chemical grouting
Cement grouting
Cellular grouting
Safety Certifications
Standard First Aid with CPR
Confined Space Entry
Fall Protection Awareness
Lift Truck Operator
Working at Heights
Aerial Lift Training
Elevated Work Platform
Underground Orientation
WHMIS
Jun Leyson’s Projects
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Cellular Grouting to Backfill Underground Casings
Greater Toronto Area, ONA utility contractor required a grouting solution to backfill underground casings and control ground water migration into an excavation site. -
Cement Grouting in LRT Construction Project
Toronto, ONPerformed microfine cement grouting and waterstop operations using polyurethane resins, and provided soil stabilization in cross passage tunnels along the road in a light rail transit (LRT) line construction project. -
Cement Grouting to Fill Voids Behind a Tunnel Liner
Toronto, ONPerformed soil stabilization and microfine cement grout injection to fill voids around the tunnel liner at the Eglinton Crosstown Project in Downtown Toronto -
Cement Grouting to Fill Voids in Tunnel Cross Passage
Toronto, ONPerformed cement grout injection to fill voids and to stop water infiltration around the cross passage section in a tunnel. -
Chemical Grouting for Underground Utilities
Guelph, ONAfter leaks in underground vaults damaged sensitive equipment, Multiurethanes used an experienced confined space entry team to perform strategic polyurethane injection work to stop the leaks. -
Grouting Program for a Leaking Rock Shaft
Niagara Falls, ONSupported an extensive rehabilitation project for a leaking rock shaft at a hydroelectric dam. -
Grouting Program for Soil Stabilization
Toronto, ONApplied a chemical grouting solution involving sodium silicate, delivered through sleeve pipes, after surface voids formed during a directional drilling project beneath an airport construction job site. -
Pressure Grouting for Railway Repair
Toronto, ONOur technical team developed a solution to lift train track crossings on wood ties by pressure grouting under the tracks. This new approach was fast, reliable and surprised the utility contractor, who had been looking for this solution for a long time. -
Soil Stabilization for High-rise Development Construction
Guelph, ONA building restoration contractor experienced water leakage into the mechanical room. Polyurethane resin was injected to fill the holes, forming a semi-rigid foam barrier and preventing further water leakage. -
Soil Stabilization in Tunnel Construction Project
Brampton, ONProvided soil stabilization for a complex tunnel project with several site restrictions including no drilling from surface and working in close proximity to sewer and water mains. -
Soil Stabilization Program using Sodium Silicate
Toronto, ONProvided technical services to implement a soil stabilization program when loose sands were encountered during a directional drilling project beneath an active airport apron. -
Water cut-off in Pre-cast Segments
Mississauga, ONWorked onsite in a water cut-off operation to seal active inflows through pre-cast manhole segments.
