EXPERIENCED MANAGEMENT TEAM
Sentinel’s management team offers more than 200 years of combined industry experience. This is a rarity in an industry that didn’t exist 40 years ago. Clients benefit from real world experience solving complex problems that face the criminal justice industry.
ROBERT CONTESTABILE
FOUNDER
Robert Contestabile has more than 30 years of experience in the security and monitoring industry. While serving as president of Wackenhut Monitoring Services, Mr. Contestabile purchased the company and Sentinel Offender Services was born in 1993. In the intervening years, Mr. Contestabile grew Sentinel into one of the largest and most successful electronic monitoring companies in the industry.
DENNIS FULLER
CHIEF FINANCIAL OFFICER
Dennis Fuller is the Chief Financial Officer of Sentinel Offender Services. In this role, he leads the finance team and all finance related matters. As a member of the executive team, Dennis taps into his deep and wide experience as a financial analyst, controller, and CFO, with deep technical experience, to offer strategic guidance on all finance and technology related topics.
DARRYL MARTIN
CHIEF OPERATING OFFICER
Darryl Martin has more than 25 years of experience in the electronic monitoring industry, including leadership roles with Digital Products Corporation and G4S Justice Services.
MARK CONTESTABILE
CHIEF BUSINESS DEVELOPMENT OFFICER
Mark Contestabile has worked with Sentinel since 1997 in nearly every facet of Sentinel, including operations, sales, marketing and field services. For more than 15 years, Mark served as the Misdemeanant Services, Divisional President for Sentinel where he was responsible for the delivery of community-based programs and probation supervision on behalf of more than 100 courts nationwide. Since 2013, Mark has served as the Chief Business Development Officer where he provides hands-on leadership for Sales and Marketing.
YOGI RAJALA
CHIEF TECHNOLOGY OFFICER
A senior level executive with 25 years of experience and Sentinel’s CTO, Yogi leads the Product and Engineering teams at Sentinel. As the Co-founder of Omnilink Systems, Yogi has a proven record of building and scaling a company from concept to successful exit. Throughout his career, Yogi has integrated and managed different teams and solutions acquired through various mergers and acquisitions with the objective of driving positive culture and solutions. He has launched various enterprise and consumer end to end solutions that are differentiated from existing solutions in the market and has implemented mission critical solutions that are used by state and local governments in the public safety arena.
JULIE HUNT
VICE PRESIDENT HUMAN RESOURCES
Julie Hunt is one of the longest-tenured Sentinel Offender Services employees, with over 25 years of service at the company. With this background, she is the perfect person to be responsible for human resources. Julie is responsible for implementing HR strategies and practices that enable Sentinel to recruit, train, and retain the highest performing and most motivated workforce possible. Julie helps to propagate the Sentinel culture through talent management, staffing, employee benefits, learning, and development.
MELISSA STARR
SENIOR VICE PRESIDENT FIELD OPERATIONS
Melissa Starr began her career in the electronic monitoring industry in 1997 with Sentinel Offender Services managing an active offender caseload of 150 clients in Los Angeles County. She was quickly promoted through the company to branch manager, project director and then field operations manager. In 2018, Ms. Starr was promoted to Senior Vice President of Field Operations. She is responsible for contract retention, ensuring adherence to strict standard operating procedures (SOP’s) and expanding the spectrum of services with customers. Her expertise in relationship building with customers and consulting towards “best practices” has resulted in a contract retention rate of over 95 percent in a very volatile and competitive industry.
DAVID SCHEPPEGRELL
SENIOR VICE PRESIDENT CHANNEL PARTNERS
David Scheppegrell has over 38 years of law enforcement experience in various field and supervisory roles including offender monitoring. David has been involved in GPS offender monitoring for more than 20 years, including overseeing a program of 500 plus violent and repeat offenders and his lead practitioner on the National Institute of Justice Offender Tracking Standard Committee. David serves as a custodian of record for Sentinel and frequently testifies as an expert witness at criminal trials. In his role as Senior Vice President of the Channel Team, David oversees all of Sentinels reseller market.
David came to Sentinel as part of the Omnilink acquisition where he served as the Senior Director of Operations.
