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B&I has built a team of 35 in-house degreed engineers whose specialty is the cost of a building project before construction begins. Our professionals have the skills, experience, and training to analyze plans, drawings, and specifications to determine the materials, labor, and equipment needed to complete the project. With this information, they create a detailed cost estimate that includes all the necessary expenses such as site preparation, materials, labor, and contingencies.
We understand the accuracy of the construction estimate is critical to the success of the project. That’s why our engineering team has experience with complex and time-consuming engineering projects, requiring knowledge of building materials, construction methods, and local building codes.
With a comprehensive focus on a wide variety of institutional type projects, our team leverages their insight and practical knowledge regarding the functionality of various types of systems, their application effectiveness, and cost value.
Brian Frederick Mumme has been with B&I Contractors for 24 years, joining the company in 2000 immediately after earning his Bachelor of Science in Mechanical Engineering (BSME) from the University of South Florida. He played a key role in developing B&I’s Specialized Projects Department, which grew from $200,000 to over $10 million annually with more than 60 employees by 2010. In 2013, he helped shift the company’s focus toward Design-Assist, Design-Build, and Integrated Project Delivery (IPD) projects, contributing to major developments such as Cleveland Clinic Weston, Jackson Memorial, and Sarasota Memorial Hospital.
Professionally recognized for his hard work, preparation, and trusted expertise, Brian thrives in collaborative environments, working alongside dedicated teams to exceed expectations in the construction industry. He holds a Florida Professional Engineer (PE) license and is a LEED Accredited Professional in Building Design + Construction (LEED AP BD+C).
Beyond his career, Brian is actively involved in community initiatives, supporting the American Heart Association, Honor Flight, and the Tequesta Chili Cookoff benefiting American veterans. He also pursues personal interests in bodybuilding, Bible study, and building and playing guitars.
Brian has been married to his wife, Diana, for 22 years. Together, they have four children and five grandchildren. His bucket list includes summiting Cotopaxi, taking a scenic train journey through France, Switzerland, Germany, and Austria, and stargazing in Chile’s Atacama Desert.
Kathleen Simpson brings over 14 years of experience at B&I Contractors, where she has played an integral role in the company’s preconstruction efforts. She began her career in the Estimating Department immediately after earning her degrees in Physics from Jacksonville University and Mechanical Engineering from the University of South Florida. Over the years, she has contributed to nearly every HVAC estimate, ensuring precision and efficiency in project planning. Additionally, she has taken an active role in training new HVAC estimators and fostering collaboration between HVAC, Plumbing, and Electrical estimating teams.
Kathleen is known for her ability to problem-solve and manage multiple tasks efficiently. She takes great pride in witnessing the positive impact of B&I’s projects on the community and is especially excited by the opportunity to contribute to ‘skyline-changing’ projects across Florida. Her passion lies in ensuring that each project delivers the highest quality final product for end users.
Beyond her professional contributions, Kathleen is actively involved in community service. She has served as the past President of the Southwest Florida Chapter of ASHRAE and is an Executive Leadership Team member for the American Heart Association. In 2026, she will take on the role of Chairman for the Collier Heart Walk, further demonstrating her commitment to community engagement.
Outside of work, Kathleen enjoys cooking and baking, as well as recharging with her family and friends—often through their shared love of sports. She is an enthusiastic supporter of University of Louisville athletics and cherishes the memories created while traveling to games. Her bucket list includes exploring destinations such as Alaska, Scotland, Ireland, and Greece.
Kathleen embodies the values that drive B&I’s success, making her an invaluable member of the team.
As Plumbing Manager for Building Solutions at B&I Contractors, Jerzy Mamprejew brings over 30 years of experience in the plumbing industry, including nine years with B&I. Originally from Poland, where he also earned his degree in Business, Jerzy has dedicated his career to mastering the complexities of plumbing management in a range of commercial projects. His extensive expertise has proven invaluable to B&I’s mission of delivering excellence and ensuring project success.
Jerzy is known for his dependability and for embodying B&I’s core values of safety, quality, integrity, and teamwork. His commitment to safety is evident in his meticulous attention to detail, ensuring each project adheres to the highest industry standards. He is also a champion of quality, consistently striving to exceed client expectations and deliver outcomes that reflect B&I’s commitment to excellence.
Jerzy’s dedication to his work speaks volumes. He takes pride in the accomplishments of his team and is motivated by the positive impact their efforts have on clients and the broader community.
Chad Fikes serves as the HVAC Manager for Building Solutions at B&I Contractors, bringing over 25 years of engineering experience, including five years with B&I. He joined the company in April 2019 and has since made significant contributions to major projects throughout Florida. Chad’s career began in New York, where he worked as a consulting mechanical engineer for 22 years, specializing in projects for higher education and hospitals, including Cornell University, the University of Rochester, and Syracuse University. Before joining B&I, he also focused on multifamily housing projects and earned his Professional Engineer license in New York in 2018.
Since joining B&I, Chad’s first project was Sarasota Memorial Hospital’s new 360,000-square-foot campus in Venice, FL. His portfolio has grown to include multiple projects with Sarasota Memorial, Tampa General, HCA, Lee Health, and UHS.
Chad is passionate about blending his engineering background with the practical knowledge of B&I’s field staff, which he believes is invaluable to achieving successful project outcomes. He values the exchange of ideas and expertise that comes from working closely with construction teams, emphasizing that listening to experienced field staff is crucial to building effectively.
Outside of work, Chad enjoys solving puzzles, playing guitar, and spending time with his family. A dedicated hockey enthusiast, he and his family are frequent spectators at rinks across Florida and beyond. Chad looks forward to future travels, with the Black Hills, Yellowstone, and the Grand Canyon topping his bucket list, along with aspirations to explore Spain, Italy, and France.
CEO of B&I Contractors
Jason Grabowski, Chief Executive Officer of B&I Contractors, has dedicated 33 years to the company, shaping its growth and guiding its vision forward. Born in Bristol, Pennsylvania, and raised in Fort Myers, Florida, Jason holds a degree in Mechanical Engineering from Duke University. Throughout his career at B&I, he has developed deep expertise in estimating, project management, and business development, along with practical field experience in sheet metal and pipefitting trades. Known for his unwavering attention to detail, Jason is skilled in problem-solving and fostering teamwork, core values he upholds alongside B&I’s commitment to safety, quality, and integrity.
As CEO, Jason is passionate about integrating advanced technology into the construction industry and prioritizing the development of a skilled, future-ready workforce. His commitment to professional growth and innovation aligns with B&I’s dedication to excellence and community involvement, seen through his work with the American Heart Association, the Children’s Museum of Naples, and the American Society of Heating, Refrigeration, and Air-Conditioning Engineers. Jason’s achievements have been recognized with the Milton Garland Refrigeration Award.
Grounded in dedication and balance, Jason is a family man and father to two sons, Cameron and Nathaniel. Outside of work, he dreams of fly fishing in Patagonia—a testament to his calm and reflective nature. Jason’s thoughtful approach continues to shape his impact at B&I Contractors.
HVAC Manager – Building Solutions
Chad Fikes serves as the HVAC Manager for Building Solutions at B&I Contractors, bringing over 25 years of engineering experience, including five years with B&I. He joined the company in April 2019 and has since made significant contributions to major projects throughout Florida. Chad’s career began in New York, where he worked as a consulting mechanical engineer for 22 years, specializing in projects for higher education and hospitals, including Cornell University, the University of Rochester, and Syracuse University. Before joining B&I, he also focused on multi-family housing projects and earned his Professional Engineer license in New York in 2018.
Since joining B&I, Chad’s first project was Sarasota Memorial Hospital’s new 360,000-square-foot campus in Venice, FL. His portfolio has grown to include multiple projects with Sarasota Memorial, Tampa General, HCA, Lee Health, and UHS.
Chad is passionate about blending his engineering background with the practical knowledge of B&I’s field staff, which he believes is invaluable to achieving successful project outcomes. He values the exchange of ideas and expertise that comes from working closely with construction teams, emphasizing that listening to experienced field staff is crucial to building effectively.
Outside of work, Chad enjoys solving puzzles, playing guitar, and spending time with his family. A dedicated hockey enthusiast, he and his family are frequent spectators at rinks across Florida and beyond. Chad looks forward to future travels, with the Black Hills, Yellowstone, and the Grand Canyon topping his bucket list, along with aspirations to explore Spain, Italy, and France.
Plumbing Manager – Building Solutions
As Plumbing Manager for Building Solutions at B&I Contractors, Jerzy Mamprejew brings over 30 years of experience in the plumbing industry, including nine years with B&I. Originally from Poland, where he also earned his degree in Business, Jerzy has dedicated his career to mastering the complexities of plumbing management in a range of commercial projects. His extensive expertise has proven invaluable to B&I’s mission of delivering excellence and ensuring project success.
Jerzy is known for his dependability and for embodying B&I’s core values of safety, quality, integrity, and teamwork. His commitment to safety is evident in his meticulous attention to detail, ensuring each project adheres to the highest industry standards. He is also a champion of quality, consistently striving to exceed client expectations and deliver outcomes that reflect B&I’s commitment to excellence.
Jerzy’s dedication to his work speaks volumes. He takes pride in the accomplishments of his team and is motivated by the positive impact their efforts have on clients and the broader community.
B&I has built a team of 35 in-house degreed engineers whose specialty is the cost of a building project before construction begins. Our professionals have the skills, experience, and training to analyze plans, drawings, and specifications to determine the materials, labor, and equipment needed to complete the project. With this information, they create a detailed cost estimate that includes all the necessary expenses such as site preparation, materials, labor, and contingencies.
We understand the accuracy of the construction estimate is critical to the success of the project. That’s why our engineering team has experience with complex and time-consuming engineering projects, requiring knowledge of building materials, construction methods, and local building codes.
With a comprehensive focus on a wide variety of institutional type projects, our team leverages their insight and practical knowledge regarding the functionality of various types of systems, their application effectiveness, and cost value.
Brian Frederick Mumme has been with B&I Contractors for 24 years, joining the company in 2000 immediately after earning his Bachelor of Science in Mechanical Engineering (BSME) from the University of South Florida. He played a key role in developing B&I’s Specialized Projects Department, which grew from $200,000 to over $10 million annually with more than 60 employees by 2010. In 2013, he helped shift the company’s focus toward Design-Assist, Design-Build, and Integrated Project Delivery (IPD) projects, contributing to major developments such as Cleveland Clinic Weston, Jackson Memorial, and Sarasota Memorial Hospital.
Professionally recognized for his hard work, preparation, and trusted expertise, Brian thrives in collaborative environments, working alongside dedicated teams to exceed expectations in the construction industry. He holds a Florida Professional Engineer (PE) license and is a LEED Accredited Professional in Building Design + Construction (LEED AP BD+C).
Beyond his career, Brian is actively involved in community initiatives, supporting the American Heart Association, Honor Flight, and the Tequesta Chili Cookoff benefiting American veterans. He also pursues personal interests in bodybuilding, Bible study, and building and playing guitars.
Brian has been married to his wife, Diana, for 22 years. Together, they have four children and five grandchildren. His bucket list includes summiting Cotopaxi, taking a scenic train journey through France, Switzerland, Germany, and Austria, and stargazing in Chile’s Atacama Desert.
Kathleen Simpson brings over 14 years of experience at B&I Contractors, where she has played an integral role in the company’s preconstruction efforts. She began her career in the Estimating Department immediately after earning her degrees in Physics from Jacksonville University and Mechanical Engineering from the University of South Florida. Over the years, she has contributed to nearly every HVAC estimate, ensuring precision and efficiency in project planning. Additionally, she has taken an active role in training new HVAC estimators and fostering collaboration between HVAC, Plumbing, and Electrical estimating teams.
Kathleen is known for her ability to problem-solve and manage multiple tasks efficiently. She takes great pride in witnessing the positive impact of B&I’s projects on the community and is especially excited by the opportunity to contribute to ‘skyline-changing’ projects across Florida. Her passion lies in ensuring that each project delivers the highest quality final product for end users.
Beyond her professional contributions, Kathleen is actively involved in community service. She has served as the past President of the Southwest Florida Chapter of ASHRAE and is an Executive Leadership Team member for the American Heart Association. In 2026, she will take on the role of Chairman for the Collier Heart Walk, further demonstrating her commitment to community engagement.
Outside of work, Kathleen enjoys cooking and baking, as well as recharging with her family and friends—often through their shared love of sports. She is an enthusiastic supporter of University of Louisville athletics and cherishes the memories created while traveling to games. Her bucket list includes exploring destinations such as Alaska, Scotland, Ireland, and Greece.
Kathleen embodies the values that drive B&I’s success, making her an invaluable member of the team.
As Plumbing Manager for Building Solutions at B&I Contractors, Jerzy Mamprejew brings over 30 years of experience in the plumbing industry, including nine years with B&I. Originally from Poland, where he also earned his degree in Business, Jerzy has dedicated his career to mastering the complexities of plumbing management in a range of commercial projects. His extensive expertise has proven invaluable to B&I’s mission of delivering excellence and ensuring project success.
Jerzy is known for his dependability and for embodying B&I’s core values of safety, quality, integrity, and teamwork. His commitment to safety is evident in his meticulous attention to detail, ensuring each project adheres to the highest industry standards. He is also a champion of quality, consistently striving to exceed client expectations and deliver outcomes that reflect B&I’s commitment to excellence.
Jerzy’s dedication to his work speaks volumes. He takes pride in the accomplishments of his team and is motivated by the positive impact their efforts have on clients and the broader community.
Chad Fikes serves as the HVAC Manager for Building Solutions at B&I Contractors, bringing over 25 years of engineering experience, including five years with B&I. He joined the company in April 2019 and has since made significant contributions to major projects throughout Florida. Chad’s career began in New York, where he worked as a consulting mechanical engineer for 22 years, specializing in projects for higher education and hospitals, including Cornell University, the University of Rochester, and Syracuse University. Before joining B&I, he also focused on multifamily housing projects and earned his Professional Engineer license in New York in 2018.
Since joining B&I, Chad’s first project was Sarasota Memorial Hospital’s new 360,000-square-foot campus in Venice, FL. His portfolio has grown to include multiple projects with Sarasota Memorial, Tampa General, HCA, Lee Health, and UHS.
Chad is passionate about blending his engineering background with the practical knowledge of B&I’s field staff, which he believes is invaluable to achieving successful project outcomes. He values the exchange of ideas and expertise that comes from working closely with construction teams, emphasizing that listening to experienced field staff is crucial to building effectively.
Outside of work, Chad enjoys solving puzzles, playing guitar, and spending time with his family. A dedicated hockey enthusiast, he and his family are frequent spectators at rinks across Florida and beyond. Chad looks forward to future travels, with the Black Hills, Yellowstone, and the Grand Canyon topping his bucket list, along with aspirations to explore Spain, Italy, and France.
