Call us: (302)478-9800



Certified Public Accountants in Wilmington, Delaware


Susan L. Nichol CPA

Quickbooks Pro Advisor | Wilmington, DE | Chandler Nichol & Sloan P.A.
QuickBooks Pro Advisor
Prior to joining Chandler Nichol & Sloan, P.A. in 1995, Susan ran a successful bookkeeping practice where she honed her expertise in record keeping and QuickBooks. Having spent her entire professional career working in public accounting, Susan brings over 20 years of experience to our firm in all aspects of individual and business tax and accounting.

Susan works closely with individuals, businesses, trusts, and estates dealing with a broad range of accounting issues from complex tax planning and preparation concerns to as simple as assisting with their basic bookkeeping queries. Susan works closely with her clients to help them plan and understand their multi-year tax situation, design efficient accounting procedures, and develop strategies to avoid issues with federal, state, and local taxing authorities.

Outside of the office, Susan is an avid Equine and Ice Hockey enthusiast attending events happening in the Pennsylvania, Delaware, Maryland and New Jersey area.

Susan graduated with a BS in Accounting from the University of Delaware.

Ian T. Sloan CPA

Since joining the firm in 2003, Ian has provided tax preparation, tax planning, and accounting services for individuals and a range of entities from small businesses to not for profits.

Ian assists individuals, corporations, LLCs, trusts, and estates with a broad spectrum of tax and accounting concerns including (but not limited to) entity formation and setup, capital gains, estimated tax payments, stock compensation plans, retirement plan selection, the Alternative Minimum Tax, ACA compliance, foreign earned income, succession planning, and multi-state tax concerns/state nexus. Ian believes in working with his clients to tailor their tax plan to minimize their tax exposure, achieve their long-term financial goals, and assist with substantiation so that they are best prepared to deal with taxing authorities.

Ian is a graduate of the University of Delaware. Outside of the office, Ian enjoys vintage cars, motorsports, and travel.

Mimi Firlein

Office Manager
Mimi graduated from the University of Delaware with a Bachelor of Science in Human Resources. Having worked in the legal field since high school, she later returned to the University of Delaware earning a Certificate in the Paralegal Studies Program. Looking for a change, she joined the firm in 2015 as our office administrator. Outside the office she enjoys traveling and spending time with her family and pets.