Staff

  • Executive Team
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    Brent Baxter, CEO, ACG

    Brent Baxter

    Chief Executive Officer

    As Chief Executive Officer at ACG, Brent oversees all aspects of the organization's operations and plans for strategic growth.

    He has a long career in middle market M&A, with more than 25 years of sell-side and buy-side advisory experience, closing more than 200 transactions with a combined value of more than $1 billion. He also has a long and dedicated history supporting ACG in a volunteer capacity, serving in multiple positions on the ACG Board of Directors, and was recently honored with a Lifetime Achievement Award at the 2023 DealMAX event.

    Brent has been an active participant in numerous chapter leadership events for 20+ years, forming deep connections with ACG's chapter network. He has attended more than 250 ACG events throughout the U.S. and has been a key member of his local ACG St. Louis chapter, serving in multiple positions including Board President, Membership Chair, Chair of the Corporate Peer Group, as well as Chair of a key multi-chapter Midwest event, the Growth Conference.

    Immediately before joining ACG, Brent served as Managing Director at Nolan & Associates, a leading boutique investment banking firm with a focus on the middle market.

    Prior to joining Nolan, Brent spent 18 years as Managing Director of a St. Louis independent investment bank. He also has extensive experience growing private companies through acquisitions, serving as CEO of a food manufacturing company that more than quadrupled its sales in eight years, and continuing to serve on the boards of several privately held companies.

    Brent and his wife, Celeste, have two sons, and when he is not attending ACG events or board meetings, he enjoys traveling, reading and cooking, which he developed a passion for while working in an Italian restaurant in college.

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    Shannon Buenik, Chief of Staff

    Shannon Buenik

    Chief of Staff
    312.957.4275

    Every organization needs a compass. Shannon is that to ACG. Since 2010 she’s been a steadfast steward to board volunteers, chapter executives and staff. Shannon began her career in politics and government with the Illinois State Senate, then leveraged her governance understanding to serve the business community through the Illinois Commerce Commission. Shannon later joined Smith Bucklin as an association manager juggling myriad responsibilities, including ACG. When ACG transitioned to a staff-driven organization, Shannon was one of the first employees to join. Her governance experience is invaluable to ACG’s Global Board of Directors; her collaborative style and organization skills are unmatched - evidenced by successful implementation of ACG’s web and CRM platforms. Shannon ensures the senior management team is aligned with the board’s strategic objectives, and supports staff exceeding the expectations of internal and external stakeholders.

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    Michael Rivera

    Chief Strategy Officer
    312.957.4283

    Michael Rivera oversees ACG's chapters, operations, membership, marketing, communications and leadership development across local, regional, national and international levels.  With nearly twenty years of experience in new business development, management consulting and strategic planning, he creates and executes scalable solutions that support ACG's mission and vision. Before becoming Chief Strategy Officer, he was Executive Director for ACG Los Angeles and CEO for the ACG West Region. 

    He is the Founding Director of the University of Southern California’s Marshall Venture Fund, an industry-agnostic venture capital fund investing in early-stage startups founded by USC students, alumni, faculty and staff. Michael developed and taught a second-year MBA course at USC called the Marshall Venture Lab and served as a mentor for Quake Accelerator and Blackstone LaunchPad in Los Angeles. 

    Before joining ACG, he spent over a decade as the Founder and President of Santa Monica-based 6th Street Ventures, an early-stage investment firm. He co-founded Westside Trading Company, a commodity trading firm based in central California, where he managed international banking and operations while actively trading commodities.  

    Michael began his career as an attorney and registered lobbyist in Washington, D.C. representing corporate clients. He received his J.D. from the Pennsylvania State University School of Law and his B.A. from Georgetown University.   

  • Regional Executives
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    Christy Dancause

    Christy Dancause

    Regional CEO, Northeast and Great Lakes and Executive Director, ACG Boston
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    Debra Michie

    Debra Michie

    Regional CEO, Mid Atlantic & South and Executive Director, ACG Raleigh-Durham
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    Veronica Muñoz Headhsot

    Veronica Muñoz

    Regional CEO, West and Executive Director, ACG Denver
  • Senior Leadership
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    Amy Ruebsam

    SVP, Membership and Executive Director, ACG St. Louis
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    Brittany Timmerman headshot

    Brittany Timmerman

    SVP, Chapter Operations and Executive Director, ACG Dallas
  • Chapter Operations
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    Chris Dickman

    Chris Dickman

    Senior Manager, Chapter Operations
    312.878.8563
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    Stephanie Cirillo

    Stephanie Cirillo

    Chapter Operations Manager
    312.957.4286
  • Operations
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    Jason Headshot

    Jason Friske

    Vice President, IT Systems
    312.957.4284
  • Events Operations
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    Areiel Dorsey

    Ariel Dorsey, CMP, CMM

    Vice President, Events
    312.957.4267
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    jennifer Moore

    Jennifer Moore, CMP

    Director Event Production
    704.975.8523
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    Kate Weaver

    Kate Weaver

    Director, Events
  • Executive Operations
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    Lauren Jezsek

    Lauren Jezsek

    Director of Executive Operations
    631.494.3967
  • Finance
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    Gloria Headshot

    Gloria Gordils

    Senior Vice President, Controller
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    Olga Arbelo

    Olga Arbelo

    Accounting Supervisor
    312.776.2672
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    Elizabeth Villegas

    Senior Accountant
    323.648.2982
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    Alex Santiago

    Alex Santiago

    Senior Finance Manager
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    Tania Weeks

    Tania Weeks

    Senior Accountant
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    Antonio Estrada

    Antonio Estrada

    Junior Accountant
  • Media
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    Kathryn Mulligan

    Kathryn Maloney

    Vice President, ACG Media
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    Michelle McAvoy

    Michelle Bruno

    Art Director, ACG Media
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    Anastasia Donde

    Anastasia Donde

    Senior Editor
    312.239.3139
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    Carolyn 1

    Carolyn Vallejo

    Digital Editor
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    Hilary Collins

    Hilary Collins

    Associate Editor
  • Marketing
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    Leslie Acevedo

    Leslie Acevedo

    Senior Manager, Marketing
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    Taylor Smith

    Taylor Smith

    Senior Manager, Special Events Marketing & Social Media
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    Alexis Farrell

    Alexis Mostafa

    Regional Marketing Manager
  • Sales & Sponsorships
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    Kaitlyn Gregorio Headshot

    Kaitlyn Gregorio

    Vice President, Sales
    602.741.2226
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    Kelly

    Kelly Matava

    Advertising Sales Associate
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    Karen Jozefowicz

    Karen Jozefowicz

    Sales Coordinator
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    Hollie Merrick

    Hollie Merrick

    Sales Coordinator
  • GF Data
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    Bob-Dunn, GF Data

    Bob Dunn

    Managing Director
    609.480.2788
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    Ryan Meyers

    Ryan Meyers

    Sales Director
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    Ruben Burke

    Ruben Burke

    Senior Sales
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    Ryan McCann

    Ryan McCann

    Middle Market Analyst