Management Team

Brian Osborne has been with Sentinel since 1982. He began at Sentinel as a marketing representative, became Sales Manager in 1985, and was named VP of Marketing in 1987. In 1989, his duties were expanded and he was elevated to Executive VP of Sales and Marketing. He is a graduate of Lewis University in Romeoville, IL, and has received his Masters of Business Administration from the University of Chicago. Named as Co-President in February of 2018.

Timothy Hill joined Sentinel in 1985 as a Controller and was elevated to VP of Finance in 1987 and CFO in 1989. He is a graduate from Elmhurst University and a certified public accountant. He received his MBA in Tax Accounting from DePaul University in Chicago in 1994. Prior to joining Sentinel, he worked for Wolf & Company from 1984-85, and for Coleman, Epstein & Berlin Company from 1982-1984. Named as Co-President in February of 2018.

Robert Lenartowicz has been with Sentinel since 1990. He began at Sentinel as the Director of Information Technology. In 1994, his duties were expanded to VP of Consulting Services. He is a graduate of Elmhurst University, and has his Masters of Business Administration specializing in Information Technology from Illinois Institute of Technology (IIT). Named as Co-President in February of 2018.