about us header

 Who we are

We function as a resource enhancing your knowledge and strengthening your team. 

The Keystone Alliance team has decades of nonprofit experience and a demonstrated track record of strengthening the financial and mission performance of its client organizations. From regular weekly check-ins with your team to share updates and report on results, to an embedded Keystone liaison to work on-site at your organization so your team has an expert-on-hand to support your operations and serve as a sounding board for new ideas.  We work together with our customer organization to create and deliver innovative, long-term solutions that make a real and lasting mission impact.

Keystone and M+S Press Release - January 2023

From Surviving to Thriving - A Keystone Alliance Presentation


This link leads to the machine-readable files that are made available in response to the Federal Transparency in Coverage Rule and includes negotiated service rates and out-of-network allowed amounts between health plans and healthcare providers. The machine-readable files are formatted to allow researchers, regulators, and application developers to access and analyze data more easily.


 The Team

  • Greg Petersen

    Chief Executive Officer

    Greg Petersen was appointed Chief Executive Officer (CEO) of the Keystone Alliance in July 2020. Previously, Greg served as Search's Director of Venture Development from 2004 - 2006 and became its Chief Administrative Officer in 2007. Greg played a key role in Keystone Alliance’s launch, serving as its Chief Administrative Officer until 2017 when he joined Glenkirk as its CEO.

    Since that time, Greg has overseen the opening of four new residences, completed Glenkirk’s long-term residential rebuilding initiative, continued the organization’s transition to smaller day services settings, and leveraged technology to improve individuals’ ability to connect with their communities. Greg’s service to Glenkirk, Search, and Keystone over the past two decades has given him a unique insight into the Illinois nonprofit environment. Together with his entire leadership team, Greg looks forward to continuing to support thriving nonprofit missions and communities across Illinois.


  • Ernesto Hernandez

    Chief Information Officer

    Ernesto Hernandez has served Illinois I/DD agencies as an IT professional for the past decade, and his experience in the IT field extends over 20 years. He is proficient in systems administration, user support, and data architecture.

    His core strength lies in setting and implementing long-term IT strategies. At Keystone, Ernesto successfully restructured legacy systems into a formal data center, which included secure and redundant backups, secure remote access, implemented cybersecurity policies, and improved bandwidth for all users. These changes were implemented seamlessly, with end-users experiencing improved functionality only. Ernesto is now leading Keystone's migration to Microsoft 365 cloud, which will further improve security and efficiency, and democratize data access for optimized decision-making.
  • Linda Coleman

    Chief Financial Officer

    Linda Coleman attended the University of Illinois – Champaign Urbana where she received a Bachelors Degree in Business Administration and a Masters Degree in Accounting.  Linda has worked in the non-profit sector for more than 20 years, including serving as CFO of Boys and Girls Clubs of Chicago from 1993 - 2004. 

    In 2004, Linda was appointed CFO of Glenkirk, a non-profit disability services provider.  In 2009, Linda was appointed Chief Financial Officer of the Keystone Alliance.  In her position with Keystone Alliance, she serves as the CFO for Keystone’s four affiliate organizations, including Search, Inc.
  • Judie Caribeaux

    Chief Collaborations Officer

    Judie joined the Keystone team in 2023 as our Chief Collaborations Officer. She is a Licensed Clinical Social Worker and has earned a Master of Arts in Communication from Northern Illinois University and a Master of Social Work from Aurora University. She has more than 30 years of experience working with non-profits, universities, and municipalities.

    As the Executive Director for a domestic violence victim services agency, she led the successful negotiation and implementation of a strategic merger which significantly expanded services and removed barriers to safety for victims. She has extensive experience leading organizations through strategic planning, creating management routines, and developing high performing executive teams. Judie was awarded the Non-Profit Executive of the Year by her peers through the West Suburban Philanthropic Network. She is currently adjunct faculty for the Social Work Department at Regis College and has taught at Northern Illinois University, Elmhurst College, North Central College, and Aurora University. She currently serves on the Board of Directors of the Illinois Coalition Against Domestic Violence.