Entrepreneurial Growth Capital

We partner with early stage B2B Software, Enterprise IT and Healthcare IT companies.

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About Us

We provide Entrepreneurial Stage Capital to fast-growing, recurring revenue-model, software-enabled companies which address healthcare business needs or supply chain inefficiencies. We focus on opportunities throughout the lower Great Lakes region from our Ann Arbor and Columbus offices.

We are often the lead institutional investor in a Series A round with check size from $1.0-2.5 million, but we also participate with smaller investments in earlier rounds in order to partner with Series A prospects, as well as participate in follow-on rounds when we’ve previously invested in an A round.

We have significant experience with entrepreneurial stage companies and know where we can add value by challenging, but not second-guessing management.


>86 Repairs
>Deep Lense
>HealthPlan Data Solutions
>Healthy Roster
>Super Dispatch
>Vantage Point Logistics


Ben Trumbull

Ben joined Mark to help launch Tamarind Hill in 2017 and leads the firms Ann Arbor office. Ben serves on the Board for Tamarind Hill portfolio companies TrackAbout, 86 Repairs, and Handle (Observer).

Before Tamarind Hill, Ben managed the Rocket Venture Fund, a seed-stage venture capital fund targeting B2B software investments. Prior to being named fund manager, Ben served as an EIR and CFO for two portfolio companies, where he aided in fundraising rounds and organizational development for both companies.  Ben also provided venture assistance to Plymouth Venture Partners, where he conducted due diligence and managed investment pipeline.  Additionally, Ben held management roles for a family office in Toledo, where he oversaw venture capital and private equity investments and was a market researcher covering P&G (Oral Care & Pet Care) for the Nielsen Company.

Ben holds a BA in economics from Denison and an MBA from IU’s Kelley School of Business.  He lives in Ann Arbor, MI with his wife, Kate, and three children.

Mark Shary

Prior to co-founding Tamarind Hill, Mark has been a prolific founder, seed investor, advisor, board member and executive for more than a dozen technology start-ups.  He chairs the boards of two portfolio companies, Updox and Vantage Point Logistics, and serves on the board of two others, Deep Lens and HealthPlan Data Solutions. Mark also is an executive committee member of the board of Rev1 Ventures, a venture development organization with over $100 million under investment, and is a director at hc1.com, as well. 

Software companies that Mark founded or co-founded have raised over $80 million in private capital and have collectively grown to over $135 million revenue.  The first, HUBLink, merged with Healthcare.com and reached $70 million revenue prior to ultimately being acquired by Infor.  Additionally, Mark has been a NASDAQ CFO, an executive with Ernst & Young, an audit chair for a regulated investment company, and a co-founder of a 28 year running public charity.

Mark holds a BBA in accounting from the Mendoza School of Business at Notre Dame.  He lives in Columbus, OH with his wife Teresa and is the proud father of two adult sons.

Claus Von Zychlin

Prior to joining Tamarind Hill in May 2017, Claus was the CEO of Mt. Carmel Health System, flagship system of Trinity Health, one of the nation’s largest non-profit integrated health networks. Claus helped lead Mt. Carmel to be one of the premier health systems in the Midwest. Claus has over 30 years of executive experience managing with healthcare systems. Prior to Mt. Carmel, Claus served as COO of TriHealth in Cincinnati, and before that, president of The Christ Hospital in Cincinnati.

Claus supports the Tamarind Hill management team by providing strategic guidance and connectivity to industry thought leaders.


Kurt Dalton

Managing Director at Mardal Investments

Stephanie Fortner

VP at Crane Investment Company

Geoff Meyers

Former CFO HCR ManorCare, Current member of the Board for WellTower, HCA, Trust company of Toledo

Brooke Skinner Ricketts

CMO Cars.com, member of the Board of Directors at HyreCar, University of Phoenix

Chris Ostrander

Chairman/Partner at Cornerstone Consulting, Chairman/Partner at Kensington Hill Capital

Matt Wilson

Managing Director - Head of Private Equity / Alternative Investments at Nationwide Insurance


220 E. Huron St., Suite 650  |   Ann Arbor, MI 48104   |   (419)345-7688

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