JG

James G. "Jim" DeJong, Business Attorney in Milwaukee, Wisconsin

focused on Business, M&A, and Securities

Milwaukee, WI

Trusted business attorney serving Milwaukee.

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James G. "Jim" DeJong is an attorney based in Milwaukee, WISCONSIN. The practice focuses on Business, M&A, and Securities.

Based in
Milwaukee, WISCONSIN
Experience
attorney
Known for
Business · M&A · Securities
  • Handles Business, M&A, and Securities matters from Milwaukee, WISCONSIN.
  • Recognized with Best Lawyers in America — Corporate Law (2026).

About James G. "Jim" DeJong: James G. "Jim" DeJong is an attorney based in Milwaukee, WISCONSIN. The practice focuses on Business, M&A, and Securities.

Areas of practice

Legal matters James takes on

James concentrates on business, m&a, and securities. Each area below outlines the kind of case James handles, typical outcomes to expect, and how the intake process starts.

Business cases in Milwaukee, Wisconsin

James takes business matters in Milwaukee, Wisconsin. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before James agrees to represent you.

M&A cases in Milwaukee, Wisconsin

James takes m&a matters in Milwaukee, Wisconsin. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before James agrees to represent you.

Securities cases in Milwaukee, Wisconsin

James takes securities matters in Milwaukee, Wisconsin. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before James agrees to represent you.

Biography

Meet James G. "Jim" DeJong — business lawyer in Milwaukee

James G. "Jim" DeJong is an attorney based in Milwaukee, WISCONSIN. The practice focuses on Business, M&A, and Securities.

Jim’s practice focuses on representing privately held businesses and their owners on the wide variety of legal matters that may arise. This includes extensive experience with significant corporate transactions such as purchases and sales of businesses, complex contractual matters, and planning for business succession. In his practice, Jim works with clients across a wide range of industries, including fintech, manufacturing, distribution, and professional services. Jim has a unique perspective on the challenges of running a successful business having served as O’Neil Cannon’s President and Managing Shareholder for more than 25 years.

A cornerstone of Jim’s practice is building strong relationships with the clients’ owners and senior management. Jim’s experience has shown that effective legal counsel begins with a deep understanding of his clients’ businesses. This better positions him to provide tailored solutions that align with the clients’ goals and objectives. Jim and the law firm prioritize providing excellent legal work and exceptional client service delivered with efficiency, clarity, and practicality to minimize legal obstacles while maximizing opportunities for success.

Jim Assists Clients With

  • mergers, acquisitions, sales and recapitalizations of businesses;
  • shareholder agreements and operating agreements;
  • securities law matters, including private offerings of debt and equity securities;
  • restrictive covenants and nondisclosure agreements; and
  • day to day legal and business issues, governance, compliance, and operational matters.

    Jim’s Approach

    Jim has a proven track record of applying his decades of experience and common sense to help clients navigate legal challenges with confidence. Whether a client is planning a sale of a business, acquisition of another business, or seeking guidance on general legal matters, Jim is dedicated to delivering results-driven solutions that support long-term success.

    Awards/Distinctions

  • State Bar of Wisconsin
  • American Bar Association
  • Wisconsin Chapter of Association for Corporate Growth (ACG)

    Awards/Distinctions

  • Peer review rated as AV Preeminent®, the highest rating in the Martindale-Hubbell® Peer Review Rating™ System
  • Selected by his peers for inclusion in the Best Lawyers in America© (2010 - present) in the fields of corporate law, mergers and acquisitions, and securities/capital markets law
  • Selected for inclusion in the Wisconsin Super Lawyers list (2007- present)
  • Recipient of Carroll University’s MacAllister Distinguished Alumni Award (2019)

    Community Involvement

  • Served for nine years on the Board of Trustees of Carroll University, including three years as Board Chair.
  • Has been involved as a Board Member of the Milwaukee Repertory Theater and the Friends of Art of the Milwaukee Art Museum
  • Board Member, Thelma Sadoff Center for the Arts, Fond du Lac, Wisconsin
  • Ordained Elder, Presbyterian Church of United States of America

    Education

  • Marquette University Law School (J.D.)
  • Carroll University (B.S.)

Working with James on a business matter

Jim’s practice focuses on representing privately held businesses and their owners on the wide variety of legal matters that may arise. This includes extensive experience with significant corporate transactions such as purchases and sales of businesses, complex contractual matters, and planning for business succession. In his practice, Jim works with clients across a wide range of industries,…

Who James represents

James reviews new inquiries case-by-case for business, m&a, and securities matters in Milwaukee and the surrounding Wisconsin area.

Credentials

Education, bar admissions, and languages

  • Marquette University

    J.D. · 1978

Jurisdictions

James's state bar admissions

  • Wisconsin, State Bar

    ACTIVE

James studied at J.D. in Marquette University.

Law school and academic background

James completed J.D. in Marquette University. Formal legal training is one signal of substantive knowledge — the day-to-day practice James runs in Wisconsin is where that training gets applied to real client questions.

Recognition

Recognition and thought leadership

James has received 10 formal recognitions from bar associations, industry bodies, and peer-review services.

  • Best Lawyers in America — Corporate Law

    2026

  • Best Lawyers in America — Mergers and Acquisitions Law

    2026

  • Best Lawyers in America — Securities / Capital Markets Law

    2026

  • Best Lawyers in America — Special Focus:

    2026

  • Best Lawyers in America — Regulatory

    2026

  • Best Lawyers in America — Awards:

    2026

  • Best Lawyers in America — Recipient of the 2019 P.E. MacAllister Distinguished Alumnus Award, presented by Carroll University

    2026

  • Best Lawyers in America — Named one of “Milwaukee’s Leading Lawyers” in 2013, 2014, and 2015–Business, M Magazine

    2026

  • Best Lawyers in America — Selected for inclusion in Wisconsin Super Lawyers in 2005–2023 Law & Politics and Milwaukee Magazine

    2026

  • Best Lawyers in America — Recipient of an AV Preeminent™ 5.0 out of 5.0 rating by Martindale-Hubbell

    2026

Legal awards and honors

Best Lawyers in America — Corporate Law (2026). Best Lawyers in America — Mergers and Acquisitions Law (2026). Best Lawyers in America — Securities / Capital Markets Law (2026). Best Lawyers in America — Special Focus: (2026). Best Lawyers in America — Regulatory (2026). Best Lawyers in America — Awards: (2026).

Locations

James G. "Jim" DeJong's office in Milwaukee

James's primary office is at 111 East Wisconsin Avenue, Suite 1400, Milwaukee, Wisconsin, 53202. In-person meetings are by appointment; a phone intake usually comes first.

Main office

111 East Wisconsin Avenue, Suite 1400

Milwaukee, Wisconsin 53202

Open in Google Maps

Client feedback

Client reviews of James G. "Jim" DeJong

James has not yet collected verified client reviews on LawyersListed. Reviews here are all from confirmed clients; anonymous ratings are moderated out.

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Hiring guide

How to hire James G. "Jim" DeJong — what to expect in your first consultation

Working with a new business attorney should feel structured. Here's how the first two conversations with James usually go, from the moment you request a consult to the day representation begins.

Consultation formats and pricing

James charges for the initial consult. That fee is credited toward representation if you retain James's office.

What to bring to your first meeting

Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; James will tell you what matters and what doesn't.

Questions to ask a business attorney in Milwaukee, Wisconsin

A short list to run through before you commit: How many business matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?

Fees & payment

Fees, payment methods, and consultation options for James

James discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in business practice — ask which fits.

Hourly rates, contingency fees, and flat-fee options

Every business matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. James confirms the model in the engagement letter before any work starts.

Payment methods and payment plans

James's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many business practices work with clients on structured schedules.

Frequently asked

Frequently asked questions about James G. "Jim" DeJong

  • How much does it cost to hire James for a business case?

    Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. James walks through the likely range during the consult so there are no surprises.

  • Does James offer a free consultation?

    James charges for the initial consult; that fee is credited toward representation if you retain James's office. Some business attorneys offer free consults — check James's current terms during booking.

  • How long do business cases in Wisconsin typically take?

    Simple business matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. James gives a realistic estimate for your facts at the consult — vague answers here are a red flag.

  • Can James take my case if I'm outside Milwaukee?

    James is licensed in Wisconsin. Matters governed by Wisconsin law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — James will tell you if the case is a fit or refer you to someone closer to your court.

  • What should I bring to my first meeting with James?

    Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. James will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.

  • Is James accepting new business clients right now?

    James's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.

Areas served

Business attorneys serving Milwaukee, Madison and Waukesha in Wisconsin

James handles business matters throughout Wisconsin. Each city below is a direct link into the search page for verified business attorneys in that community.

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