Our Team
MS Filter Systems was founded in 2001 to deliver practical and sustainable water treatment solutions for small communities. The Multi-Stage Filtration process was developed with advisory input from some of North America's leading experts in slow sand filtration. Initial pilot studies began in 1993 with full scale installations installed as early as 1995. The first ozone/roughing filter/slow sand installation was commissioned in 1998. Our decades of experience and more than 40 water treatment plants installed across Canada have made us the preeminent choice for this technology.
Robert “Bob” LeCraw, P.Eng
President & Founder
A graduate of Queen’s University with a Bachelor of Science in Engineering, Bob has spent his distinguished career actively engaged in the design, planning and management of drinking water and wastewater treatment projects. While at Marshall Macklin Monaghan, Bob’s experience in water treatment led to his realization that traditional chemical-based water treatment plants are problematic for small communities. Specifically, the chemistry required to maintain the plants and produce quality drinking water is complex and poses a significant challenge for most operators. Bob’s work in designing conventional slow sand water treatment plants inspired him to build on that elementary science, creating a solution to treat a wider range of raw water quality with a system that is effective, manageable, and sustainable. Bob’s ingenuity has led to more than 25 years of honing this system, the founding of MS Filter Systems, and has made him an authority on slow sand filtration. Beyond the technology, Bob’s immersive experience in this field has developed in him a deep understanding of the needs and challenges faced by small communities across Canada, and specifically of the remote indigenous communities that he has been serving for more than 3 decades.
Christa LeCraw, BA
Director of Business Development
After a lifetime of connection to the founding and evolution of MS Filter Systems, Christa officially joined the family business in 2020. She brings extensive expertise in small business administration, document control, and marketing, guiding MS Filter into a new phase of growth. Following in the footsteps of her father, Bob LeCraw, Christa is committed to the company’s core belief that everyone deserves clean drinking water and that systems must be tailored to the unique needs of the communities they serve. With a blend of entrepreneurial spirit and a deep respect for her father’s legacy, she applies her skills to the daily operations of the company, ensuring MS Filter continues to deliver innovative, community-focused water treatment solutions.
Kristof Karpiuk, B.Eng
Director of Operations
Kristof Karpiuk joined MS Filter as the Director of Operations in 2023, holding a Bachelor of Civil Engineering degree from Carleton University. Kristof grew up in Thunder Bay, where he now anchors the MS Filter Thunder Bay headquarters. He brings extensive experience and expertise with both pilot and full-scale MS Filter drinking water treatment systems as well as specialized experience with ozone systems. Specializing in water solutions for small municipalities and First Nation communities, Kristof works closely under the guidance of Bob LeCraw, P.Eng., fostering strong, trust-based relationships with operators. His background includes hands-on experience in constructing water treatment plants and deploying ozone-based systems, reinforcing MS Filter Systems' commitment to practical, community‑focused water treatment innovation.