Bob Koster Sr. founded K&S Plumbing in 1982, and he had no idea it would grow into a commercial plumbing company spanning three generations. Once Bob Sr. retired in 1997, his sons Bob Jr. and Jack took over the family business. Today, the company is managed by Brian Koster and Ben Koster with Robert Koster overseeing everything. Since we are a family-owned company, you can trust us for some of the best plumbing work in the area. Over 35 years of experience has taught us that the customer is always right.

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We are looking for motivated individuals who want to be part of a team and learn the many aspects of the plumbing trade. Start your new career now! If hired, you would work under our highly skilled and licensed Journeyman Plumbers for three years. After your apprenticeship hours are satisfied with the state, you will be eligible to take the State Journeyman Exam. This license would allow you to work on your own and to run some of our Grand Rapids Commercial Plumbing projects.

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