Timothy D. Umbreit, CPA, CGMA
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Bonnie W. Korengel, CPA
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Kathleen A. Wileczek, CPA
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The Partners

Each of our partners is trained and qualified to handle the entire spectrum of Umbreit Korengel & Associates financial services, yet each specialize in particular areas of interest. We work as a team, combining our expertise to ensure that every decision is optimal…regardless of current economic conditions or immediate challenges in your industry.


Kathleen Wileczek Kathleen A. Wileczek, CPA
Shareholder
Kathy brings more than 25 years of experience in the practice of public accounting, including extensive work with clients in manufacturing, construction, real estate, technology, professional services, and not-for-profit entities. She works with business owners and executive directors to develop and support accounting and financial needs. She holds a BS in Accounting from St. Joseph's University.

She is a member of the American Institute of Certified Public Accountants, the Pennsylvania Institute of Certified Public Accountants.

A longtime West Chester resident, Kathy is actively involved in business and community events and the support of local non-profits. She is an active member of the Greater West Chester Chamber of Commerce, and currently serves as on the boards of the West Chester Downtown Foundation and the Chester County Estate Planning Council. She is a former officer of the West Chester Business Improvement District and the Greater West Chester Chamber of Commerce. on the March of Dimes Chester County Women of Achievement committee.
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Timothy Umbreit Timothy D. Umbreit, CPA, CGMA
Founding Shareholder
Tim’s passion for the challenging and ever-changing tax laws spurred him to found the firm in 1984, after earning his BS in Accounting from Clarion University and honing his skills at a large CPA firm in Wilmington, Delaware. The Chester County native’s strong credentials developed from serving a network of private industry clients that span a full complement of businesses.

He is a member of the American Institute of Certified Public Accountants, the Pennsylvania Institute of Certified Public Accountants, and the Delaware Society of Certified Public Accountants, and recently earned his designation as a Chartered Global Management Accountant.

Tim has been active in various organizations, including the Kennett Park and Recreation Board (president and treasurer), Kennett Consolidated School Board of Education (treasurer), Kennett Square Lions Club, Kennett Symphony Orchestra Board of Directors (president and treasurer), Symphony Endowment Fund (treasurer) and the Kennett Ice Hockey Club (president).
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Bonnie Korengel Bonnie W. Korengel, CPA
Of Council
Bonnie brought her strong financial skills on board in 1994, expanding the firm to Umbreit Korengel & Associates P.C. She holds a bachelor’s degree from Bradley University and a master’s degree from Illinois State University, and is experienced in all aspects of financial management, specializing particularly in nonprofit organizations. She is a member of the American Institute of Certified Public Accountants, the Pennsylvania Institute of Certified Public Accountants, and the Delaware Society of Certified Public Accountants.

Rooted in southern Chester County, Bonnie stays active in a variety of community organizations, including Rotary International, the Kennett Education Foundation), and Brandywine Battlefield Park Associates She also provides financial oversight for the Chester County League of Women Voters and served as a guide at Winterthur Museum in Wilmington, Delaware.
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