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


Heidi K. Gardner, PhD, is a Distinguished Fellow at Harvard Law School’s Center on the Legal Profession and Faculty Chair of the school’s Accelerated Leadership Program and Sector Leadership Masterclass. Previously she was a professor of Organizational Behavior at Harvard Business School. Dr. Gardner’s book “Smart Collaboration: How Professionals and Their Firms Succeed by Breaking Down Silos” was published in 2017 by Harvard Business Press, and became a Washington Post bestseller. Named by Thinkers 50 as a Next Generation Business Guru, Dr. Gardner co-founded the research and advisory firm Gardner & Co.

Dr. Gardner has authored more than seventy books, chapters, case studies, and articles. Her research received the Academy of Management’s prize for Outstanding Practical Implications for Management, and has twice been selected for Harvard Business Review’s “best of” collections. The 2nd edition of her book Leadership for Lawyers: Essential Strategies for Law Firm Success was published in 2019, and her special report Smart Collaboration for Lateral Hiring was published in 2018. Her next book, Smart Collaboration for In-House Legal Teams will be released in spring 2020.

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 from the University of Pennsylvania (summa cum laude; Phi Beta Kappa), a Masters degree from the London School of Economics (with distinction), and second Masters and PhD from London Business School.

Heidi K. Gardner  PhD

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

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

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