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Our People

Our People

The essence of Collaborative Structures Limited is our people

We invest in our employees, fostering the spirit of collaboration to grow and expand, while maintaining our commitment to a corporate culture that embodies open communication, passion, and personal growth. With a diverse and talented multi-generational team, we continue to strive toward total client satisfaction and excellence in all projects. Our product may be buildings, but our strength is in our people.

David Timlock

David Timlock, P.Eng., G.S.C.
dtimlock@collaborativestructures.com
519.658.2750

President, Founder

David Timlock, President of Collaborative Structures Limited, possesses over 30 years of experience in the Construction and Project Management field. His qualifications encompass work in all aspects of the construction industry, including consulting, Contractor, and Owner.

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Bill Zister

Bill Zister, B.ASc., MBA
bzister@collaborativestructures.com
519.658.2750

Chief Executive Officer

Bill joined Collaborative Structures in April 2018 with over 17 years of construction experience. Bill is a proven leader with a track record for exemplifying professionalism, encouraging collaboration and fostering communication.

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Josh Blackler

Josh Blackler, G.S.C.
jblackler@collaborativestructures.com
519.658.2750

Partner, Vice President

After graduating from Conestoga College’s, Architecture - Construction Engineering Technology (ACET) program, Joshua joined the CSL team in May 2006 as a Junior Estimator. As CSL was still in its infancy, Joshua drew on the experience of David Timlock and senior Project Managers to develop his skills.

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Jim Blair

Jim Blair, C.E.T., G.S.C.
jblair@collaborativestructures.com
519.658.2750

Partner, Director of Business Development

Since his graduation from the Conestoga College ACET program with Honours, Jim joined CSL in September 2009 and continued to build on his childhood passion for construction.

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Justin Bender

Justin Bender, G.S.C.
jbender@collaborativestructures.com
519.658.2750

Partner, Director of Field Operations

Justin Bender joined our team full time after graduating from the Architecture – Construction Engineering Technology Co-op program at Conestoga College in 2008.

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Paul McKenna, Operations Manager

Paul McKenna, B.Sc
pmckenna@collaborativestructures.com 
519.658.2750

Construction Operations Manager

Paul joined the Collaborative Structures team in April 2019, as Project Manager, after a successful 17 year career in the United Kingdom. He possesses extensive knowledge of project management across the institutional and commercial sectors, with a specialty in multi-phased construction planning.

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Robert Radmore

Robert Radmore, G.S.C., C.S.C
rradmore@collaborativestructures.com
519.658.2750

Health & Safety Manager

Rob joined Collaborative Structures with over 10 years' experience in the field of construction safety management. He has a proven track record of being a reliable and knowledgeable Health and Safety Manager with a robust knowledge of the OHSA and regulations. He has experience creating safe, comprehensive, and understandable safety programs.  

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Dan Dietrich

Dan Dietrich, G.S.C.
ddietrich@collaborativestructures.com
519.658.2750

Senior Project Manager

Dan Dietrich is an accomplished Project Manager possessing over 30 years of experience in the Industrial, Commercial, Institutional, and Multi- Residential industry. Upon graduating from Conestoga College’s Construction Engineering program in 1983, Dan worked as an Estimator and Project Manager until he founded his own company in 1992.

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Sergio Lima

Sergio Lima, G.S.C.
slima@collaborativestructures.com
519.658.2750

Project Manager

Continuing a long standing career in Construction Management, Sergio joined our team with over 20 years of experience in the ICI sector, with significant commercial and industrial project management experience.

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Andrew Reibel

Andrew Reibel, C.E.T.
areibel@collaborativestructures.com
519.658.2750

Project Manager

Andrew is a Certified Engineering Technologist, with over nine years of experience in ICI estimating and construction management of projects up to $30 million construction value.

His comprehensive background includes budget building, cost estimating, the construction management process, AutoCAD design, and general construction practices, which make him an asset to CSL’s Project Management team.

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Colin Thomson

Colin Thomson, G.S.I.
cthomson@collaborativestructures.com
519.658.2750

Project Manager

Colin joined Collaborative Structures in June of 2018, with over 9 years of experience in the construction industry. Upon graduating from Architectural Technology (Co-op Program) at Sheridan College, Colin worked as a Building Information Modeling (BIM) Coordinator. 

Colin also has extensive experience with Government Infrastructure and maintains a high level of quality control throughout his projects.

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Stefanie Rajnak

Stefanie Rajnak
srajnak@collaborativestructures.com
519.658.2750

Project Manager

Stefanie joined Collaborative Structures in June of 2018 with over 7 years of construction experience. Stefanie is highly detail-oriented, a self-motivated leader, and exemplifies strong communication skills. She possesses a strong working knowledge of ICI construction, Ontario building codes, and software programs associated with the preparation of construction documents and drawings. Her superior communication and interpersonal skills make her a strong asset to the CSL team as she consistently exceeds client expectations.

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Adam Moore

Adam Moore
amoore@collaborativestructures.com
519.658.2750

Project Manager

Adam joined Collaborative Structures in January 2019 and has almost 10 years of construction industry experience. As a graduate of the George Brown College - Construction Engineering Technology Program, Adam has both technical and practical skills that bolster his reputation for effective project management; budgeting, scheduling, and communication with key stakeholders.

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Rachel Fletcher

Rachel Fletcher, CSO
rfletcher@collaborativestructures.com
519.658.2750

Office Manager

Rachel joined Collaborative Structures in September 2009 and has held various positions throughout her time here, including but not limited to: contract administrator, IT, marketing, and office administrator. Her superior knowledge of CSL’s inner workings makes her an exceptional problem solver and a great resource.