PKF MUELLER - Key Persons


Aaron O'Connor

Job Titles:
  • in 2020 As a Managing Director
  • Partner, Elgin

Amy M. Chamoun

Job Titles:
  • Leader
  • Partner
  • Partner, Elgin
Amy is a leader in the Firm's PKF Advisory National Practice Group focused on international business and partners with PKF members on global engagements. She has been instrumental within the Consulting Services Group, exploring foreign investments and value-added activities to meet and exceed client expectations.

Ann M. Behrens

Job Titles:
  • Partner, Elgin

Audra M. Conforti

Job Titles:
  • Director, Elgin

Brian Donlan

Job Titles:
  • Partner, Chicago

Brian P. Sullivan

Job Titles:
  • Partner, Elgin

Chris Gent

Job Titles:
  • Partner, Elgin

David J. Nissen - CEO

Job Titles:
  • CEO
  • CEO, Chicago, Elgin

David Zhu

Job Titles:
  • Supervisor
  • Supervisor, Chicago

Edward T. McCormick

Job Titles:
  • Partner, Orland Park

Edward W. Mulcahy

Job Titles:
  • Partner, Orland Park

Gregory A. Mills

Job Titles:
  • Partner, Orland Park
Greg has extensive experience in attestation services, providing audit, review and other consulting services to a wide variety of closely held companies. His client engagements include commercial audits and reviews of financial service firms, a major insurance brokerage firm, a professional employment organization and many others with annual revenues between $10 and $100 million. He also specializes in employee benefit plan audits; he is a member of the leadership team of the Firm's Employee Benefit Services Group and has been involved in leadership panels in the EBPA arena. In addition, he is proficient in the preparation of federal and state income tax returns.

James J. Hare

Job Titles:
  • Partner, Elgin

Jeffrey A. Delheimer

Job Titles:
  • President, Chicago

Joel Blanford

Job Titles:
  • Supervisor, Elgin

John A. Bibeau

Job Titles:
  • Partner, Orland Park

John Boehm

Job Titles:
  • Director, Chicago, Elgin

John M. Fedus

Job Titles:
  • Partner, Chicago

Julie Collins

Job Titles:
  • Manager, Orland Park

Karen Boyaris

Job Titles:
  • Director, Elgin
  • in 2023 As a State & Local Tax Director

Kelley Dopka

Job Titles:
  • Director, Chicago
  • MSA

Kevin J. Bissell

Job Titles:
  • Leader
  • Partner, Orland Park
Kevin is a leader in the firm's Government niche and has 20 years of experience working with municipalities, school districts, fire districts, and other special-purpose governmental units. This experience allows him to effectively perform, review, and supervise client engagements. Additionally, he provides education and guidance to staff who service these types of clients.

Kyle Wehrli

Job Titles:
  • Director, Elgin

Lakota Hernandez

Job Titles:
  • Supervisor, Elgin

Lance Delgado

Job Titles:
  • Member of the Firm 's Employee Benefit Services Group
  • Supervisor, Orland Park
Lance is an active member of the Firm's Employee Benefit Services Group which works on initiatives related to client service improvement, staff development, and growth.

Mark Gerros

Job Titles:
  • Manager, Chicago

Mark V. Stricker

Job Titles:
  • Director, Elgin

Matthew Biehl

Job Titles:
  • a Tax Associate
  • Manager, Chicago
Matthew joined PKF Mueller as a Tax Associate in 2017 after accounting experience in the tax department of a Michigan based CPA firm and an audit internship at the same firm working with their Employee Benefit Plan Group. He currently works out of PKF Mueller's Chicago office.

Matthias Koehler

Job Titles:
  • Member of Our International Alliance
Matthias Koehler, member of our International Alliance from Koehler Transatlantic Business Results, discusses how our firms work together to help German-speaking firms enter or expand further into the U.S. market.

Melissa Miziniak

Job Titles:
  • Manager
  • Manager, Elgin
As Manager, Melissa is responsible for monitoring and performing various auditing functions along with preparation and initial review of financial statements. Her areas of specialty include benefit plans and working with large and middle market companies in the public and private sector.

Milton Ferrell

Job Titles:
  • Manager, Elgin

Scott Anderson

Job Titles:
  • Director

Scott Simpson

Job Titles:
  • Director