About Us
Being a small CPA company years back, today, we’re a bustling and vibrant full-service public accounting firm serving everyone from individuals to corporations. One thing that’s remained constant: an emphasis on exemplary service.
Get in Touch TodayAbout Our CPA Company
While there are many CPA firms in Chicago alone, here's what makes us so special and trusted by our clients:
Susan S. Lewis, Ltd. has a deep history of delivering exceptional accounting services. Since 1986, we’ve provided comprehensive tax and accounting solutions for individuals and businesses. We’re national in scope and have served thousands of clients since our inception.
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With a focus on highly personalized services, we unburden clients of headaches, hassles and worries. We’re dedicated to keeping you financially healthy and on a secure path to reach your goals.
We are your trusted advisor — through the good, the crazy, and the unexpected.
Meet Our Team
Our professional CPA firm has a deep history of delivering exceptional accounting services. Since 1986, we’ve provided comprehensive tax and accounting solutions for individuals and businesses. No matter the industry or size of the business, our team of experts is always there for you.
Diane Williams
CPA, Tax Preparations & Financial Planning
Diane Williams is responsible for the financial planning and investing arm of Susan S. Lewis, Ltd.
Since joining our firm in 1993, Diane has contributed in all capacities in support of our individual and business clients. From individual tax preparation to retirement plan management, Diane provides analysis, insight, support, guidance and advice to individuals and businesses.
Prior to joining Susan S. Lewis, Ltd., Diane started her professional career with Coopers & Lybrand in Chicago.
Diane is a Certified Public Accountant, holds securities licenses for Series 6, 63 and 65 and is licensed to provide both health and life insurance. Diane received her Bachelor of Science in Accounting from Illinois State University in Normal, IL.
She resides in Naperville, IL with her husband and two sons.
Since joining our firm in 1993, Diane has contributed in all capacities in support of our individual and business clients. From individual tax preparation to retirement plan management, Diane provides analysis, insight, support, guidance and advice to individuals and businesses.
Prior to joining Susan S. Lewis, Ltd., Diane started her professional career with Coopers & Lybrand in Chicago.
Diane is a Certified Public Accountant, holds securities licenses for Series 6, 63 and 65 and is licensed to provide both health and life insurance. Diane received her Bachelor of Science in Accounting from Illinois State University in Normal, IL.
She resides in Naperville, IL with her husband and two sons.
Dana Campbell
CPA, Financial Statement Audits & Assurance
Dana works primarily with our not-for-profit clients. She enjoys all things financial and brings enthusiasm, collaboration and organization to every project. When not working with clients and debits & credits, Dana relishes time with her husband and three sons, pickleball, long walks and best-seller books. She's also an avid traveler and dotes on her two pups, Ozzie & Gus.
Dianne Carobus
CPA, Quickbooks & Financial Statements
As a CPA, Dianne has specialized in monthly accounting, financial statement preparation, compilations and reviews for Susan S. Lewis Ltd.'s clients. Working with the firm since December 2006, she loves helping small businesses and the interaction she has with business owners on a daily basis. Dianne also has extensive QuickBooks and other accounting software knowledge and has spent many hours assisting and training clients with their bookkeeping tasks. She has relocated to a warmer climate, and when not crunching numbers, loves to craft, travel, and play golf.
Cyndi Schoell
Manager, Payroll Services
Cyndi has been with the firm for over 25 years, she brings depth to her position with broad accounting experience. Her work primarily focuses on payroll and sale tax preparation. She is married for nearly 40 years and has been blessed with two grandchildren. She treasurers her time with family and friends.
Cyndi will be retiring after 40+ years in accounting to be spending more time with her grandchildren and family.
Cyndi will be retiring after 40+ years in accounting to be spending more time with her grandchildren and family.
Julie Keating
Office Manager
Julie joined the Lewis team over 15 years ago. You'll likely talk to her several times as she's the friendly voice and face of the firm. She wears many hats, from scheduling appointments to client relations. When not multitasking in the office, she is multitasking at home. Julie enjoys cooking and entertaining and spending time with her family including her husband, three children and son-in-law, three grandchildren and one crazy French bulldog, Lola.
Lori Groves
Associate, Incorporations & Registrations
After career raising her three children, Lori joined the firm to work in the area of incorporations and registrations. She enjoys the tight-knit nature of the Lewis team and getting to know new clients. When not at work, she can be found on the golf course with her husband, traveling around the country visiting their children or walking her beloved dog, Oreo.
Theresa Quigley
Associate, Accounting Services
Theresa worked in the financial field from the banking side and provides a variety of accounting support to our team. When she's not at work and the Midwest weather allows, you'll find her outside working in her yard or exploring new places for long walks. She also enjoys spoiling her many nieces and nephews.
Patti Iwinski
Associate, Payroll Services
Patti brings years of accounting expertise and manages the weekly, biweekly and monthly  payrolls for clients. She's also an active member of several not-for-profit organizations, including the St. Charles Moose Family Center, which provides support for children and seniors in need. She'll never pass up a raffle ticket for a good cause-which recently resulted in her winning a custom-made motorcycle.
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Benefits
Our Technology Stack
We do our best to always stay on top of modern cutting-edge software, hardware, and techniques. This way, we can ensure that our clients get only the best customer-focused audit & accounting services, that will reflect their business goals and needs.
Great Level of Communication
We believe effective communication is key to every successful partnership. That’s why we keep you informed, involved, and supported at every step. Whether it’s a quick update, a detailed walkthrough, or answering your questions, we’re always accessible and ready to ensure you feel confident and understood.
Expedite Service
We know exactly how time-critical reporting and bookkeeping procedures can sometimes be. This is why our experts optimized their time management skills to near perfection. Get your accounting done in the shortest of time, without sacrificing the quality and the thoroughness of the job.
Client Reviews
We have been using Susan for over 20 years, she has provided excellent service and helped us through many of our life changing moments: new homes, college expenses, employment changes and more. We would recommend her for all your financial needs.
Michael Parent
We have been working with Susan for many years and we love working with her. She is very attentive, detail oriented, and has her customers best interests in mind. We highly recommend her.
Lea Pinsky
Susan and her entire staff are, simply, perfect. They know exactly what they're doing, everything runs smoothly, and they treat customers like old friends. I would recommend them to anyone.
Michael Chaffee
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