The Wirtz Law Firm

What The Wirtz Law Firm does

The Wirtz Law Firm is a privately held, solo-practitioner law firm founded in 2011 by Mark A. Wirtz in Wheaton, Illinois. The firm represents individual clients in two practice areas: family law (including divorce, settlement agreements, litigation, parental responsibilities and parenting time, child support, property division, maintenance/spousal support, domestic violence matters, and post-divorce disputes) and criminal defense (covering DUI, felonies, misdemeanors, drug crimes, violent crimes, and property crimes). The firm's branded approach to family law work is "intelligent divorce" — positioning itself around strategic, outcome-tailored representation rather than emotionally driven litigation.

The business operates from two physical locations in the Chicago western suburbs: the primary office at 207 Reber Street, Suite 201 in Wheaton, and a secondary office at 15 Salt Creek Lane, Suite 321 in Hinsdale. Revenue is generated through professional services billing on a per-matter basis (typically hourly or flat fees), with pricing not publicly disclosed. Client acquisition flows through the firm website, a single phone line (630-260-0744), an online contact form, and likely professional referrals driven by Mark Wirtz's memberships in the American Bar Association, Illinois State Bar Association, DuPage County Bar Association, and Will County Bar Association, plus lecturing engagements at Kent Law School and legal symposiums. The firm's competitive positioning rests on Mark Wirtz's prosecutorial background at the Cook County State's Attorney's Office (eight years handling hundreds of felony and misdemeanor matters, including first degree murder, attempted murder, and narcotics) and prior complex family law litigation experience at Schiller, DuCanto and Fleck. He is admitted to practice in Illinois, Iowa, and the United States Supreme Court. The firm has no technology platform, no AI capabilities, no outside investors, and no institutional ownership — it operates as an independent founder-owned practice.

Name

The Wirtz Law Firm

Legal name

The Wirtz Law Firm

Website

https://wirtzlawfirm.com

Company type

Private

Founded year

2011

Operating status

Operating

Headcount range

1–10 employees

Short description

The Wirtz Law Firm is a Wheaton, Illinois-based solo law practice founded in 2011 by Mark A. Wirtz, representing individual clients in family law matters (divorce, custody, support, property division) and criminal defense (DUI, felonies, misdemeanors, drug, violent, and property crimes) across DuPage County and the Chicago western suburbs.

Ownership category

akta.pro rank

Product category

Legal Services

NAICS

Offices of Lawyers (541110), Legal Services (5411)

SIC

Services-Legal Services (8111)

akta.pro primary industry

Litigation & Dispute Resolution (BPAHAAAB)

Keywords

• Family law services
• Criminal defense representation
• Divorce representation
• DUI defense
• Felony defense

Headquarters

HQ city

Wheaton

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Legal Services - Family Law: Billing for family law services including divorce, settlement agreements, litigation, parental responsibilities, child support, property division, maintenance/spousal support, domestic violence matters, and post-divorce disputes. Services likely billed hourly or as flat fees per matter type.
2. Legal Services - Criminal Law: Billing for criminal defense services including DUI, felonies, misdemeanors, drug crimes, violent crimes, and property crimes. Services likely billed hourly or as flat fees per matter type.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

The Wirtz Law Firm is an Illinois-based law practice that provides family law representation (divorce, settlement agreements, litigation, parental responsibilities and parenting time, child support, property division, maintenance/spousal support, domestic violence matters, and post-divorce disputes) and criminal defense representation (DUI, felonies, misdemeanors, drug crimes, violent crimes, and property crimes) to individual clients in DuPage County and the surrounding Chicago metropolitan area. The firm is led by principal attorney Mark A. Wirtz and practices "intelligent divorce," focused on strategic, cost-effective, case-by-case resolution with trial-ready preparation.

Product overview

The Wirtz Law Firm is a legal services practice organized into two primary service lines: Family Law Services and Criminal Law Services. Family Law encompasses divorce proceedings (including settlement agreements and litigation), parental responsibilities and parenting time, child support, property division, maintenance/spousal support, domestic violence matters, and post-divorce disputes. Criminal Law covers DUI, felonies, misdemeanors, drug crimes, violent crimes, and property crimes. The firm is led by Mark A. Wirtz, an experienced trial attorney with extensive prosecutorial background from the Cook County State's Attorney's Office.

Differentiator

Problem solved

Functional benefit

Products and services

• Family Law Services Comprehensive family law representation for individuals in Illinois, including divorce, settlement agreements, litigation, parental responsibilities and parenting time, child support, property division, maintenance/spousal support, domestic violence matters, and post-divorce disputes. The firm practices an "intelligent divorce" approach that focuses on each client's specific circumstances and strategically pursues goals while limiting emotional damage.
• Criminal Law Services Criminal defense representation for individuals in Illinois, covering DUI defense, felonies, misdemeanors, drug crimes, violent crimes, and property crimes. Leverages the principal attorney's eight years as a Cook County prosecutor and trial experience across hundreds of felony and misdemeanor cases.
• Divorce Representation
• Settlement Agreement Drafting and Negotiation Drafting and negotiation of comprehensive settlement agreements enabling parties to move forward respectfully post-divorce, especially when children are involved.
• Family Law Litigation Family law litigation for cases involving parental responsibilities, parenting time, child support, spousal support, and property division when negotiated settlement is not achievable.
• Parental Responsibilities and Parenting Time Representation Legal representation in custody disputes focusing on the best interests of children, addressing allocation of parental responsibilities and parenting time arrangements.
• Child Support Representation Child support representation under Illinois' income-sharing model, interpreting and applying the 2017 statutory formulas that consider each parent's income and parenting time.
• Property Division Representation Equitable property division services including asset identification, classification as marital or non-marital, valuation, and distribution under Illinois law.
• Maintenance / Spousal Support Representation Maintenance (alimony) representation, including interpretation of statutory factors and formulas for determining payment amount and duration for couples with combined gross income of $500,000 or less.
• Domestic Violence Representation Legal services for domestic violence matters, including obtaining Orders of Protection and defense representation for those wrongfully accused.
• Post-Divorce Dispute Resolution Post-judgment dispute resolution for enforcement or modification of divorce judgments, including support modifications based on substantial financial changes.
• DUI Defense Driving under the influence defense for first-time offenders and serious situations, leveraging Mark Wirtz's detailed knowledge from handling DUI cases as a Cook County prosecutor.
• Felony Defense Felony defense drawing on prosecutorial experience at Cook County's 26th and California courthouse, including first degree murder, attempted murder, predatory criminal sexual assault, aggravated battery, and reckless homicide.
• Misdemeanor Defense Misdemeanor defense leveraging experience in local Illinois courts, judges, and law enforcement, with potential for charge dismissal or expungement especially for minor offenses or first-time offenders.
• Drug Crimes Defense Drug offense defense including possession of marijuana, controlled substances, drug paraphernalia, cannabis/narcotics trafficking, unlawful delivery, and fraudulent prescriptions, leveraging Narcotics Prosecution Bureau experience.
• Violent Crimes Defense Violent crime defense drawing on the principal attorney's prosecutorial background analyzing strengths and weaknesses of violent crime cases to assemble the strongest possible defense.
• Property Crimes Defense Property crime defense covering all classes of property offenses with major financial ramifications, utilizing knowledge of local courts, judges, and law enforcement.

Quantifiable outcome

• Hundreds of felony and misdemeanor cases tried throughout career
• +1 more outcomes

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators2 records

Recent moves5 records

Expansion highlights3 records

Direct peers

• Momkus LLC: Momkus LLC is a DuPage County family law firm with offices in the Chicago western suburbs. Comparable in geography, practice area specialization, and individual client focus.
• The Law Offices of Jeffery M. Leving: Jeffery M. Leving is a prominent Chicago family law attorney specializing in custody and fathers' rights. Comparable in Illinois family law focus with similar individual-client service model and bar association engagement.
• Schiller, DuCanto and Fleck: Schiller, DuCanto and Fleck is the largest family law firm in the United States and the prior employer of Wirtz Law Firm's founder. It is the most direct comparable in family law practice area, Illinois footprint, and high-asset divorce clientele.
• Sterling Lawyers: Sterling Lawyers is a Chicago-based family law firm serving DuPage County and surrounding Illinois suburbs. Direct competitor in family law with similar suburban client base and practice area focus.
• Law Office of Daniel J. Kollias: Daniel J. Kollias is a DuPage County criminal defense attorney with former prosecution experience. Direct comparable in criminal defense practice area and prosecutorial background moat.
• O'Flaherty Law: O'Flaherty Law is an Illinois-based firm serving DuPage County and surrounding areas with both family law and criminal defense services. Direct comparable in dual-practice model and geographic footprint.
• Katz & Stefani, LLC: Katz & Stefani is a Chicago family law firm with similar matrimonial practice areas including divorce, custody, and support. Direct peer in Illinois family law litigation and negotiated settlements.

Broad incumbents

• Cordell & Cordell: Cordell & Cordell is a national family law firm with multiple offices including Illinois locations. Larger incumbent operating broadly in the family law space with regional offices competing for similar suburban clientele.

Others

• LegalShield: LegalShield is a subscription-based legal services platform providing access to attorneys for family law and criminal matters. Adjacent ecosystem player that influences how consumers access and pay for traditional legal services like those offered by Wirtz Law Firm.

Regional players

• Stange & Associates: Stange & Associates is a multi-state family law firm with Illinois offices. Comparable in family law practice areas including divorce and custody, with broader geographic reach beyond Illinois.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/the-wirtz-law-firm

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about The Wirtz Law Firm