John Sieger
AeroLeads people directory · profile

John Sieger Email & Phone Number

Partner at Katten Muchin Rosenman LLP at Katten Muchin Rosenman LLP
Location: Greater Chicago Area, United States, United States 3 work roles 2 schools
2 work emails found @kattenlaw.com 3 phones found area 212 LinkedIn matched
✓ Verified Jun 2026 4 data sources Profile completeness 100%

Contact Signals · 2 work emails · 3 phones

Work email j****@kattenlaw.com
Direct phone (212) ***-****
LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Katten Muchin Rosenman LLP
Role
Partner at Katten Muchin Rosenman LLP
Location
Greater Chicago Area, United States, United States
Company size
1426 employees

Who is John Sieger? Overview

A concise factual answer block for searchers comparing this professional profile.

Quick answer

John Sieger is listed as Partner at Katten Muchin Rosenman LLP at Katten Muchin Rosenman LLP, a company with 1426 employees, based in Greater Chicago Area, United States, United States. AeroLeads shows a work email signal at kattenlaw.com, phone signal with area code 212, and a matched LinkedIn profile for John Sieger.

John Sieger previously worked as Partner at Katten Muchin Rosenman Llp and Partner at Jenner & Block. John Sieger holds Doctor Of Law (J.D.) from University Of Michigan Law School.

Company email context

Email format at Katten Muchin Rosenman LLP

This section adds company-level context without repeating John Sieger's masked contact details.

{first}.{last}@kattenlaw.com
92% confidence

AeroLeads found 2 current-domain work email signals for John Sieger. Compare company email patterns before reaching out.

View email format View company profile Management contacts
Profile bio

About John Sieger

John Sieger is a Partner at Katten Muchin Rosenman LLP at Katten Muchin Rosenman LLP. He possess expertise in litigation, corporate law, civil litigation, commercial litigation, appeals and 8 more skills.

Listed skills include Litigation, Corporate Law, Civil Litigation, Commercial Litigation, and 9 others.

Current workplace

John Sieger's current company

Company context helps verify the profile and gives searchers a useful next step.

Katten Muchin Rosenman LLP
Katten Muchin Rosenman Llp
Partner at Katten Muchin Rosenman LLP
chicago, illinois, united states
Website
kattenlaw.com
Employees
1426
AeroLeads page
Company profile
View company profile Email format
3 roles

John Sieger work experience

A career timeline built from the work history available for this profile.

Partner

Jenner & Block

Partner - Insolvency and Bankruptcy Group

Mar 2002 - Apr 2005

Attorney

Seyfarth Shaw Llp

Associate - Insolvency and Litigation Groups

May 1997 - Jan 2000
Team & coworkers

Colleagues at Katten Muchin Rosenman LLP

Other employees you can reach at kattenlaw.com. View company contacts for 1426 employees →

HG Helmut Gerlach Helmut Gerlach Colleague at Katten Muchin Rosenman LlpGreater Chicago Area, United States View → SJ Sherman Johnson Sherman Johnson Colleague at Katten Muchin Rosenman LlpBronx, New York, United States, United States View → HC Harris, Charles Harris, Charles Colleague at Katten Muchin Rosenman LlpGreater Chicago Area, United States View → LL Lily Liermann Lily Liermann Colleague at Katten Muchin Rosenman LlpLibertyville, Illinois, United States, United States View → RH Ricardo Hollingsworth Ricardo Hollingsworth Colleague at Katten Muchin Rosenman LlpNew York, New York, United States, United States View → NM Nancy Malmquist Nancy Malmquist Colleague at Katten Muchin Rosenman LlpRound Lake, Illinois, United States, United States View → GS Gil Soffer Gil Soffer Colleague at Katten Muchin Rosenman LlpGreater Chicago Area, United States View → MS Mark Simon Mark Simon Colleague at Katten Muchin Rosenman LlpGreater Chicago Area, United States View → KA Karen Artz Ash Karen Artz Ash Colleague at Katten Muchin Rosenman LlpNew York, New York, United States, United States View → DG David Gonen David Gonen Colleague at Katten Muchin Rosenman LlpWashington, District Of Columbia, United States, United States View →
2 education records

John Sieger education

Doctor Of Law (J.D.)

University Of Michigan Law School

Bachelor Of Science (Bs), Finance, General

University Of Illinois - Urbana
FAQ

Frequently asked questions about John Sieger

Quick answers generated from the profile data available on this page.

What company does John Sieger work for?

John Sieger works for Katten Muchin Rosenman LLP.

What is John Sieger's role at Katten Muchin Rosenman LLP?

John Sieger is listed as Partner at Katten Muchin Rosenman LLP at Katten Muchin Rosenman LLP.

What is John Sieger's email address?

AeroLeads has found 2 work email signals at @kattenlaw.com for John Sieger at Katten Muchin Rosenman LLP.

What is John Sieger's phone number?

AeroLeads has found 3 phone signal(s) with area code 212 for John Sieger at Katten Muchin Rosenman LLP.

Where is John Sieger based?

John Sieger is based in Greater Chicago Area, United States, United States while working with Katten Muchin Rosenman LLP.

What companies has John Sieger worked for?

John Sieger has worked for Katten Muchin Rosenman Llp, Jenner & Block, and Seyfarth Shaw Llp.

Who are John Sieger's colleagues at Katten Muchin Rosenman LLP?

John Sieger's colleagues at Katten Muchin Rosenman LLP include Helmut Gerlach, Sherman Johnson, Harris, Charles, Lily Liermann, and Ricardo Hollingsworth.

How can I contact John Sieger?

You can use AeroLeads to view verified contact signals for John Sieger at Katten Muchin Rosenman LLP, including work email, phone, and LinkedIn data when available.

What schools did John Sieger attend?

John Sieger holds Doctor Of Law (J.D.) from University Of Michigan Law School.

What skills is John Sieger known for?

John Sieger is listed with skills including Litigation, Corporate Law, Civil Litigation, Commercial Litigation, Appeals, Legal Research, Legal Writing, and Class Actions.

Find 750M verified contacts

Search by job title, company, industry, location, and seniority. Export verified B2B contact data when you need it.

People with similar names

Check these profiles if this is not the John Sieger you were looking for.

John Sieger
John Sieger
Manager Of Ust Compliance At Sheetz
Claysburg, Pa
5 email domains
John Sieger
John Sieger
🟦Senior Vice President | Sales Manager | Boater ⚓ | Fisherman 🐟 🇮🇱
San Diego, Ca
3 email domains
View similar profiles