56 North Chicago Street,
Joliet, IL 60432
Call Us Today for an Initial Consultation 815-727-2100

Erin Webster O'Brien, P.C.

An Innovative Firm in Joliet with Old-Fashioned Values

"Erin is smart, genuine, and full of integrity. I walked out of her office with a smile on my face." - Steve

Will County Divorce and Family Law Attorney

Lawyer for Child Custody, Asset Division, and High Net Worth Divorce in Joliet, Illinois

Family-related legal matters can be complex, and they can involve strong emotions, contentious disputes, and financial issues that affect multiple different family members. Determining the best way to approach these types of cases can be difficult, especially for those who do not have experience with the legal system. That is why it is so important to work with a skilled and experienced family law attorney who can advise family members of their rights and help them understand the best ways to resolve legal issues successfully.

Erin Webster O'Brien, P.C., formerly Erin Webster O'Sullivan, P.C., is dedicated to serving clients throughout Will County who need legal help with matters related to family law. Ms. O'Brien is a skilled mediator and litigator, and she combines a personable and professional approach with solid legal experience to deliver quality service to every client.

Ethical, Respected, and Caring

Ms. O'Brien works to provide her clients with results-oriented, one-on-one legal assistance as they address sensitive issues involving themselves and their children. She takes pride in her ability to help people get through some of the toughest times they will ever face. As an aggressive advocate for her clients, she handles cases at all points of the spectrum, including assisting with negotiating settlements or providing representation in the courtroom. Ms. O'Brien is a skilled mediator and litigator, and she will work with you to help you achieve your goals, no matter how complex your situation.

Whether you are planning to end your marriage through an amicable divorce or are embroiled in a difficult child custody battle, our firm can meet your needs and help you determine the best steps you can take to protect your rights and interests. During your initial consultation, Ms. O'Brien will explain all the possible options for your case, helping you can make educated decisions regarding your specific family circumstances. She will work with you to resolve matters outside the courtroom whenever possible, but she will always be prepared to help you take the necessary legal action, and she will advocate on your behalf in all legal proceedings.

Contact an Experienced Joliet Family Law Attorney

Erin Webster O'Brien, P.C., will provide you with focused, personal attention throughout your case. Ms. O'Brien is committed to helping you find the best solutions to the most delicate legal issues involving your family. Call 815-727-2100 or contact us online to set up a consultation today.


Legally dissolving a marriage is rarely easy. Spouses will need to address multiple legal issues that will affect their individual finances and their ability to provide for themselves going forward, as well as their relationships with their children or other family members. Even in a seemingly simple, straightforward divorce, disagreements or disputes may arise, and in complex or high net worth divorce cases, spouses will likely need help from accountants or other financial experts. Regardless of your situation, we can help you understand the best ways to reach a positive outcome to your case.

Child Custody

Parents who get divorced or unmarried parents who separate will need to address multiple issues related to their children. A parenting plan or parenting agreement will need to be created that details how custody of children will be shared by the parents. This agreement will address legal custody, which is known as the allocation of parental responsibilities, describing how parents will share in making decisions about their children. It will also include a schedule for physical custody or parenting time, detailing when children will live with each parent and other rules that apply to parents and children.

Child Support

Parents have the legal obligation to support their children financially. When parents get divorced, or when unmarried parents are separated, support orders will need to be established to ensure that both parents are contributing to ongoing expenses related to their children. Both parents' incomes will be considered when establishing a basic support obligation that will address children's ongoing daily needs. Parents may also need to address additional child-related expenses, including costs related to health insurance and medical care for children, childcare while parents are working, and extracurricular activities.



In many cases, divorcing spouses or parents who need to address issues related to child custody can work together to resolve these matters outside of court. During mediation, a neutral mediator will help the parties find mutually agreeable solutions, encouraging them to cooperate with each other and make compromises. This process can help spouses or parents resolve disputes more quickly and efficiently while giving them control over the outcome of their case.


Collaborative Divorce


Rather than taking an adversarial approach to divorce, spouses may agree to work together with their attorneys to negotiate a divorce settlement. During a collaborative divorce, spouses will agree to be open and honest with each other and cooperate to make decisions while keeping a case outside of the courtroom. A couple may also work with experts who can help them address issues related to property division, spousal support, child support, and child custody.


Erin Webster O'Brien, Esq.

Erin Webster O'Brien, Esq.

President / Attorney

Ms. O'Brien graduated with the highest honors from Lewis University in May 2000. She earned a Bachelor of Arts Degree, double majoring in Criminal / Social Justice and American Studies (History Department). She opened her law practice in 2008. Ms. O'Brien is active in the following organizations: Will County Bar Association; Will County Women’s Bar Association; and Illinois State Bar Association. She served as the President of the Will County Bar Association for the 2019 to 2020 membership year. In 2018, Erin Webster O'Brien, P.C. received a Readers' Choice Award from Herald News as one of the top three law firms in Will County.

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