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Trusted litigators, advocates & counselors

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Our Practice Areas

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Transportation & Logistics

Representation of trucking companies, intermodal providers, steamship lines and logistics companies

Professional Liability Defense

Years of proven success defending accountants, architects & engineers,  nurses, attorneys and real estate agents

Insurance Disputes

Deep knowledge of all aspects of insurance coverage issues including professional liability, E&O, D&O, property & casualty

Contract Paper Signing
Real estate agent talked about the terms of the home purchase agreement and asked the cust

Commercial Litigation

Proven success in resolving shareholder disputes, breach of contract actions, and protection of trade secrets.

Corporate & Transactional Matters

Sullivan O'Malley can advise you on all of your business needs including:
Business formation
Commercial real estate

Real Estate & Estate Planning

We provide experienced representation to clients as they navigate what is often the biggest transactions of their lives.

We also assist clients with achieving their estate planning goals, providing much-needed peace of mind. 

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Meet David & John

Home: Our Team

David J. Sullivan, JD, CPA

An accomplished and well-respected litigator, David Sullivan focuses his practice in the areas of trucking and transportation and complex commercial litigation at both the trial court and appellate court levels. David is also a CPA and is skilled in business and transactional matters including commercial and residential real estate, estate planning and business formation. David strives to find creative and cost-effective solutions to meet the needs of his clients.

Contact David at:


John P. O'Malley

John O'Malley is an advocate, counselor and litigator with significant experience in federal and state courts in Illinois and across the Nation. He has represented clients in litigation as well as drafting and negotiating contract and insurance policy language.

His impressive body of work includes serving as lead attorney in numerous actions concerning insurance coverage for environmental liabilities, intellectual property disputes, professional liability, directors’ and officers' coverage, and insurance company errors and omissions.   He is a member of the Federal Trial Bar, and the Society for Trial Lawyers.

Contact John at:



Get in Touch

We look forward to hearing how we can help you!

Contact David:


Contact John:


161 N. Clark Street
Suite 1700
Chicago, IL 60601


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