Our Team

It Takes a Team

The Synergy leadership is built of experienced HR business partners who know what it takes to deliver exceptional HR management solutions.

Michael J. Harrington


Mike joined Synergy in 1995 as an Account Executive, and in 1997 was promoted to the position of Sales Manager. Mike works closely with the sales people and business owners in our affiliate offices. Mike was most recently the Executive Vice President & General Manager, and in 2015 moved to his current position. Prior to joining Synergy, he spent five years with Safeguard Business Systems in direct sales and then sales training and support. Mike holds a BS degree in Marketing from Eastern Illinois University.
"Character cannot be developed in ease and quiet. Only through experience of trial and suffering can the soul be strengthened, ambition inspired, and success achieved." - Helen Keller

David E. Scherer

Chief Financial Officer

Dave is a Certified Public Accountant who joined the Synergy Executive team in 2004. Dave has extensive experience in both Big 4 public accounting at Coopers & Lybrand, as well as private industry. Over the past 25 years, he has been an auditor, controller and CFO in manufacturing, distribution, banking, and service industries. He brings Synergy a strong internal control background including experience in SAS 70 and ISO certification. Dave has a BA in Accounting from the University of Notre Dame.
"Successful people will always tell you you can do something. It's the people who have never accomplished anything who will always discourage you from trying to achieve excellent things." -Lou Holtz

John H. Gerhab

Vice President of Operations

John started in the PEO industry in 1995 and was a founder of a PEO on the East Coast. There he gained extensive experience in PEO sales, finance, accounting, and operations. Prior to the PEO industry, John held various senior management positions within the insurance industry, including Senior Vice President of a major insurance brokerage operation for ten years and Vice President and Controller for Home Reinsurance Company and a division of Aetna Life & Casualty for 15 years. John holds a BS degree in Accounting from Brooklyn College-City University of New York and is a Certified Internal Auditor. John also was enrolled in the MBA Program at the College of Insurance in New York City.
"The way to get started is to quit talking and begin doing." - Walt Disney

Matthew S. Jarzynski

Vice President of Human Resources - SPHR

Matt has over 25 years of experience in human resources management and joined Synergy in June 2002 after holding similar positions with two Chicago insurance brokerage companies. He served as vice president of human resources at Near North Insurance and as regional vice president of human resources for the Marsh & McLennan Companies, the world’s largest insurance broker. A native of Chicago, he began his human resources management career at Reliance Insurance, a national property and casualty insurance operation in Philadelphia. A graduate of DePaul University in Chicago with a dual major Bachelor of Arts degree in management and psychology, Matt also holds the certification of senior professional in human resources (SPHR).
"You know you are on the road to success if you would do your job, and not be paid for it." - Oprah Winfrey

Raymond J. Costello

Chief Information Officer

Ray joined Synergy in 2008 after having been the CIO, CTO and VP of IT for several national retailers, a marketing company and a few manufacturers. Ray’s experience with payrolls comes from in-house payroll processing for store personnel spread across states all over the country. He has managed both large and small teams of developers to maintain and customize various software systems on multiple hardware platforms. Ray has led the project to replace and upgrade Synergy’s HRIS systems, and his hands-on approach, I.T. knowledge and creativity have been an excellent fit for Synergy. He holds a B.A. from Judson College in Literature and Philosophy and a B.S. from DeVry Institute for Computer Science for Business.
“The highest reward for a man's toil is not what he gets by it but what he becomes by it.” - John Ruskin

Synergy Joins Group Management Services

Synergy is excited to be partnering with GMS, the largest privately held PEO in the country. Since 1989, countless organizations have trusted Synergy with their PEO and HR functions. This new partnership with GMS will enhance our ability to serve clients while providing the same high level of service our customers have come to know and expect.


Learn More About the Acquisition Here