About Gardner & Co.

Applied research, real-world insights, pragmatic solutions, measurable impact.

We help our clients across professional services, industry, government, and non-profits to drive change through smarter collaboration.

Combining our unique blend of empirical research, academic rigor, and top-tier consulting experience, we partner with the board, C-suite and leadership teams to help transform organizations.

We are passionate about collaboration because it creates opportunities for every employee to thrive when they contribute with their full potential.

Gardner & Co. is led by Dr. Heidi K. Gardner (Harvard Fellow, best-selling author, sought-after advisor) and supported with a world-class team. Gardner & Co. also draws on its network of top-tier experts for both research and advisory work. We not only deliver smart collaboration, we live it.


Gardner & Co. supports client across industries and functions, around the world.


  • Professional services (law, accounting, consulting, engineering, PR)
  • Financial services (investment banks, asset managers, insurance companies)
  • Corporates (biotech/pharma, healthcare systems, publishing, retail, real estate)
  • Non-profits and governments

Levels and Functions

  • Boards of directors
  • Executive teams and senior management
  • In-house legal teams
  • Business owners/franchisees

We have worked on all six inhabited continents, and partner with very select local providers for longer-term engagements.

Heidi K. Gardner PhD


Dr. Heidi K. Gardner is a sought-after advisor, keynote speaker, and facilitator for organizations across a wide range of industries globally. Named by Thinkers50 as a Next Generation Business Guru, she is a Distinguished Fellow at Harvard Law School and former professor at Harvard Business School. She is currently the faculty chair and instructor in multiple executive education programs at both institutions.

Dr. Gardner works extensively with her team at Gardner & Co., partnering with boards, executive teams, and other senior leaders to boost performance by embedding the principles and practices of smarter, agile, cross-silo collaboration within those groups and across the broader organization and ecosystem—resulting in concrete, quantifiable performance improvements.

Altogether, Dr. Gardner has authored (or co-authored) more than 100 books, chapters, case studies, and articles. This includes Washington Post best-selling book Smart Collaboration: How Professionals and Their Firms Succeed by Breaking Down Silos and newly published Smarter Collaboration: A New Approach to Breaking Down Barriers and Transforming Work. Her research has received the Academy of Management’s prize for Outstanding Practical Implications for Management and has been selected multiple times for Harvard Business Review’s “best of” collections. It has also been featured in major media outlets around the globe.

Dr. Gardner has lived and worked on four continents, including as a Fulbright Fellow, and for McKinsey & Co. and Procter & Gamble. She earned her BA in Japanese Studies from the University of Pennsylvania (Phi Beta Kappa, Summa Cum Laude), a master’s degree from the London School of Economics, and a second master’s and Ph.D. from London Business School.

Heidi K. Gardner  PhD

Ivan Matviak


Ivan Matviak is the co – founder and President of Gardner & Co, responsible for operations, strategy, and partnership/licensing arrangements.

Ivan is an investor and advisor to early-stage fintech companies.  Previously he was an Executive Vice President at State Street Bank and a Managing Director at Bank of Scotland.  Ivan has launched and led a range of ‘intrepreneurial’ fintech ventures in enterprise data management and financial analytics. In addition, he has served as president/chairman of several financial software companies in the US and Europe.

Earlier in his career Ivan led strategy, product, marketing and sales functions at the Walt Disney Company (London and Paris) and Proctor & Gamble.  He was also a consultant with Bain & Co’s strategy and private equity groups in London and Johannesburg.

Ivan holds an MBA (Finance and Strategic Management) and MA (International Studies) from the Wharton School of Business /Lauder Institute, and a BA (International Relations) from the University of Pennsylvania.

Mr. Matviak can be reached on ivan@gardnerandco.co

Ivan Matviak

Csilla Ilkei

Insights Director

Csilla Ilkei is the Insights Director at Gardner & Co. Csilla leads an array of thought leadership initiatives including books, articles and white papers as well as client-facing research.

Previously, as Global Manager and Knowledge Leader at McKinsey & Company, Csilla spent over two decades building and leading the firm’s research capabilities across industry and functional practices. She has lived on three continents, worked with private and public clients in forty countries, and built and oversaw a team of experts across the globe.

Csilla is a highly skilled presenter and facilitator of client sessions with extensive experience translating research into practical actions with executive teams and large audiences. With an MBA from Corvinus University of Budapest, Csilla is experienced in leading, designing, conducting, and delivering innovative, rigorous, practical research programs.

Csilla can be reached at csilla@gardnerandco.co

Csilla Ilkei

Clinton Gary

Chief Growth Officer

Clinton Gary is the Chief Growth Officer at Gardner & Co.  He serves as a lead consultant and speaker for clients and their executive, marketing, and business development teams. He also expands Gardner & Co.’s brand awareness, broadens partnerships, and empowers the growing Smart Collaboration community with enhanced thought leadership, tools, and training.

Clinton has a track record of accelerating coherence, collaboration, and client focus in professional services by leading high-performing teams and organizational and go-to-market strategies for prominent law, accounting, and consulting firms.

His leadership and innovation spans strategic planning, marketing, industry and client initiatives, business development, and knowledge management.  His broad experience helps our clients define go-to-market and marketing priorities, align efforts and resources, improve team-based business development, foster a cohesive and knowledge-sharing culture, and drive revenue growth.

Clinton’s accomplishments include:

  • As Chief Strategy and Business Development Officer at Burr Forman, he developed an innovative key client program, BD coaching program, firmwide marketing planning and budgeting process, and collaboration/KM platform.
  • As Chief Marketing Officer at Arnall Golden Gregory, he helped the firm secure the designation of The National Law Journal’s Midsize “Hot List” for its growth plan, collaborative industry strategy, and thought leadership programs.
  • At Kilpatrick Townsend, his team received a top ten ranking for “Best Law Firm Marketing” by a publication of The American Lawyer, led the rebranding initiative which won “Best Law Firm Rebrand” by the Legal Marketing Association, and garnered national recognition for its knowledge management and marketing tech stack initiative.
  • At Arthur Andersen, he led strategic initiatives in marketing, alliances, and knowledge management, resulting in serving on the staff of the Global Managing Partner of Markets and Solutions.

He is a frequent speaker retreats and national conferences, as well as a content contributor of more than 30+ articles and case studies, including:

  • The Collaboration Imperative: Orchestrating Collaboration to Capitalize on Your Firm’s Collective Capabilities
  • Implementing a Firmwide Marketing & BD Planning & Budget Process to Improve Collaboration, Accountability, and Flexibility”
  • A Unique and Comprehensive Approach to Implementing an Industry Orientation to Drive Collaboration and Client Value

Clinton is a graduate of the University of Alabama and is based out of Atlanta, GA.

Clinton can be reached clinton@gardnerandco.com

Clinton Gary

Christine Dunne

Client & Communications Manager

Christine is the Client & Communications Manager at Gardner & Co. In this role, she develops a wide range of content for clients and marketing; conducts and synthesizes client interviews, qualitative surveys, and market research; and deepens Gardner & Co.’s relationship with clients and prospects.

Previously, Christine served as a Consulting Editor at Keypoint Intelligence, a market research and advisory firm focused on the print and document solutions industry. In this capacity, she broadened the firm’s approach to generating and delivering insights for clients and partners —through the use of such mediums as video interviews, podcasts, and infographics. She also has deep experience creating white papers, research reports, and survey tools—focused on clients’ top objectives, needs, and opportunities.

Christine’s other work experience includes reporting business and government news for daily and weekly newspapers and news websites. Based in Syracuse, New York, Christine has a MA in magazine, newspaper, and online journalism from Syracuse University and a BA in French from Loyola University in Maryland.

Christine can be reached at christine@gardnerandco.co.

Christine Dunne

Lea Haggerty

Executive Assistant

Lea Haggerty is the Executive Assistant and Administrative Director of Gardner & Co, including responsibility for events planning and coordination, bulk book orders, and research support.

With over 25 years of experience in top-tier professional service firms and higher education, Lea brings a wealth of knowledge and capabilities to our business.

Lea can be reached at lea@gardnerandco.co

Lea Haggerty