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Team Members


Kyle Lefkoff is the Founder and General Partner of Boulder Ventures Ltd. In his thirty-four years as a venture capitalist, Mr. Lefkoff has invested in 60 Colorado companies.

Mr. Lefkoff’s life science investments include Hauser Chemical Research (NASDAQ: HAUS); NeXstar Pharmaceuticals (sold to Gilead Sciences), Array BioPharma (sold to Pfizer), Dharmacon (sold to Fisher Scientific), Genomica (sold to Exelixis), ARCA Biopharma (NASDAQ: ABIO), miRagen Therapeutics (NASDAQ: MGEN), and ArcherDX.

His information technology investments include McData (sold to EMC); Atlantes Corp. (sold to Metromail); Compatible Systems Corp. (sold to Cisco Systems); Wall Street on Demand (sold to Goldman Sachs), Lefthand Networks (sold to HP), and Linerate Systems (sold to F5).

Mr. Lefkoff founded Array BioPharma in May 1998 with Marv Caruthers and a group of Amgen scientists. Mr. Lefkoff was the Chairman of the Board of Array from its inception through August 2018, when he recruited Carrie Cox to take on the Chairman’s role.  In that time, Array developed and human-tested more than twenty kinase inhibitors for cancer, inflammation and heart disease.  In June 2018, Array’s targeted therapy for melanoma was approved by the FDA.  In July 2019, Array was acquired by Pfizer for $11.4 Billion in cash, the largest acquisition of a venture-backed life sciences company in the history of Colorado.

He is also a Director of ArcherDX, CommercialTribe, and Black Bear Energy, all Boulder Ventures portfolio companies.

Mr. Lefkoff received his B.A. in Economics from Vassar College (summa cum laude) in 1981. In 1980, Mr. Lefkoff completed a Fellowship in Economic History at the London School of Economics.  In 1985, he completed his MBA in Finance at the University of Chicago.

An experienced alpinist and mountain guide, Mr. Lefkoff is the Chairman of the American Institute for Avalanche Research and Education (AIARE), the avalanche education standard among mountain guides and snow professionals in the USA.  He was a member of the 1986 American Expedition to the North Face of K2.

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Kyle Lefkoff

Founder, Managing Member

Mr. Roshko has over thirty-three years of venture capital and investing expertise focused on early stage information technology companies.  He currently serves on the boards of Closetbox, Inc, Datavail Corporation, and SyncHR, Inc.

Prior to joining Boulder Ventures in late 1998, Mr. Roshko ran a technology hedge fund, Granite Investments, which focused on fundamental analysis and a value oriented approach to public market technology investing.

Beginning in 1984, Mr. Roshko was a General Partner at Mohr Davidow Ventures (MDV) where he concentrated in software, medical devices and services.  His successful investments at MDV included: Albion Instruments, Inc. (sold to BOC/OHMEDA), Elsewhere Corporation (sold to Hewlett Packard), Prism Solutions, Inc. (NASDAQ: PRZM), and Tigon Corporation (sold to Ameritech).

Mr. Roshko was a Board member of Vantive Corporation for 9 years from its founding through its IPO and subsequent sale to PeopleSoft, Inc. (NASDAQ: PSFT).  He was a Board Member of Rally Software Development, Corp. for 10 years from its founding to its IPO in 2013 (NYSE: RALY) and BroadHop, Inc. until it was sold to Cisco Systems, Inc. in 2013 (NASDAQ: CSCO).

Mr. Roshko has been an individual investor in other successful startups including Form Factor, Inc. (NASDAQ: FORM) and the Ensign Group, Inc. (NASDAQ: ENSG).

Prior to joining MDV, Mr. Roshko was a Senior Consultant with Arthur Andersen & Co. in San Francisco where he planned, designed and implemented management information systems for a variety of client engagements.

Mr. Roshko holds an MBA from Harvard Business School (1984) and a BS (cum laude) in Industrial Engineering from Stanford University (1980).

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Peter Roshko

Managing Member

Jonathan Perl joined Boulder Ventures in 2002 and has over 20 years of venture capital experience focused exclusively on early-stage information technology companies. Mr. Perl currently sits on the boards of Zenoss, Stardog, Terrago Technologies, eMinor, and FlyByMedia. In addition, he is a board observer at Clarabridge and MediaMath.

Mr. Perl also serves on the Executive Committee of the Board of the Mid-Atlantic Venture Association.

Representative recent past investments include iLumin Software Services, Inc (sold to Computer Associates), ERA Corporation (sold to SRA International), Metron Aviation, Inc. (sold to Airbus), and RedCloud Security, Inc. (sold to Avigilon).

Prior to Boulder Ventures, Mr. Perl joined Intersouth Partners in 1997 as a member of the third class of Kaufman Fellows and in 1999 became a Partner. He was responsible for the sourcing, due diligence, structuring and negotiation of more than a dozen early stage investments, including several highly successful companies. He led Intersouth’s investments in InvoiceLink Corporation (sold to BCE Emergis) and Extensibility, Inc. (sold to TIBCO Software).

Mr. Perl is a part board member of the North Carolina Council for Entrepreneurial Development and served on the executive committee of the Board of Trustees and was Treasurer of National Child Research Center, a preschool in Washington, DC, from 2008-2012.

Mr. Perl holds an MBA from the Amos Tuck School of Business at Dartmouth College (1997) and a BA (magna cum laude) in classical history from Tufts University (1988).

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Jonathan Perl

Managing Member