Julie Park

Julie joined Venrock in 2020 and focuses on investments in the consumer, commerce, and SMB tools & services sectors.

Most recently, Julie was an executive at Facebook, where she helped SMBs grow as director of the global long tail ads business. Prior, she was on the founding product and sales teams at Pinterest. Before moving to the west coast, Julie was a vice president at Goldman Sachs, where she worked closely with consumer and retail brands.

Julie has dual degrees from Stanford, with a Master of Science from the School of Engineering.

Inside and outside the office, Julie is fascinated by emerging trends that shape how we eat, work, travel, and play. You can follow her on twitter at https://twitter.com/jpark683.

Todd Graham

Todd is based in our Palo Alto Office where he focuses primarily on enterprise infrastructure and cybersecurity. He is very passionate about the intersection of technology and business. His main areas of interest include digital transformation, human-based threats, disruptive go-to-market, and the consumerization of the user experience.

In his career, Todd has alternated between startups and large infrastructure vendors. Most recently, he led Corporate Strategy for Cisco’s Security and Collaboration businesses where he developed long-range business strategy for product and go to market while also driving inorganic activities such as the acquisition of Duo Security. Earlier in his career, he led the IT Business Management product group at VMware. Using experience gained at VMware, Todd co-founded Bluenose Analytics to help product and customer success leaders better familiarize with their customers. He also founded a Data Loss Prevention company that was acquired by EMC’s security division, RSA, while attending the University of Michigan (Go Blue!).

Outside of work, Todd can be found with his family exploring the wilds of San Francisco, attending youth soccer games, and celebrating children’s birthdays. In what remains of his spare time, he enjoys carpentry, coding, and all things Canadian.

Ethan Batraski

Ethan is a Partner based in our Palo Alto office where he invests across sectors, with a particular focus on hard engineering problems such as developer infrastructure, advanced computing, and space.

He led the investments and serve as Board Member at Astranis, Atom Computing, Skyryse, and two undisclosed companies. Prior to Venrock, Ethan was a founding Partner at Profounder, with investments across robotics, space, enterprise infrastructure, and grocery/food.

Ethan joined us after +15 years as a founder and executive leader. Most recently he held leadership roles at Facebook, leading the Ads product and engineering efforts and overseeing a $15B+ run-rate business. Prior, he led product, growth, and design as VP Product and Design at Box through their IPO. Prior, he held leadership roles leading product and engineering teams at Adchemy (acquired by @WalmartLabs), Yahoo! Search, and RiseSmart (acquired by Randstad). Ethan is the lead or co-lead inventor on 16 patents.

In and out of the office, he is a passionate early adopter, space geek, and competitive athlete. You can usually find Ethan outdoors with his kids building things that move or fly.

Nick Beim

Nick Beim focuses primarily on artificial intelligence, software, fintech and defense investments. He blogs on the economics of innovation at www.nickbeim.com.

Nick’s current investments include Dataminr, a real-time AI platform that identifies critical breaking information from publicly available data sets; Interos, a multi-tier, multi-factor third-party risk management platform; Rebellion Defense, which develops AI-driven products that serve the mission of national defense; Percipient.ai, an advanced computer vision analytics platform; Altruist, a commission-free digital investing platform for financial advisors; Ombud, an enterprise application enabling intelligent sales content collaboration; Chisel.ai, an enterprise platform for a new class of intelligent insurance applications; and Quiq, an enterprise application enabling messaging-based customer service.

Prior to joining Venrock, Nick was a General Partner at Matrix Partners and worked in the technology groups at McKinsey and Goldman Sachs.

Nick has deep interests in public policy and in particular how technology is changing the nature of national security. He serves on the Board of Directors of the Council on Foreign Relations and recently participated on a Task Force there that published Innovation and National Security: Keeping Our Edge, examining how the U.S. can maintain its lead in science and technology innovation and the national security and economic consequences of failing to do so. He serves on the Executive Advisory Committee at the Center on Global Energy Policy.

Nick also serves on the board of Endeavor, a non-profit organization dedicated to supporting high-impact entrepreneurs globally that Tom Friedman has called “the best anti-poverty program of all.”

Mike Tyrrell

Mike joined Venrock in 1999 after 16 years as an entrepreneur at venture-backed companies. He serves on the boards of CMDTY, Aria Systems, Mable, Numerated, and Salsify. Notable previous investments include Appnexus (acquired by AT&T), Bizo (acquired by LinkedIn), DataPower (acquired by IBM), Endeca Technologies (acquired by Oracle), ExtendMedia (acquired by Cisco), IMlogic (acquired by Symantec), Pedestal Software (acquired by Altiris), ZoomInfo (acquired by Great Hill), and WHERE (acquired by eBay). Prior to Venrock, Mike spent nine years with Spyglass, a Venrock-backed portfolio company, joining as their sixth employee to run sales and marketing. Spyglass licensed the first internet browser, Mosaic, to many of the world’s leading software, online services, and device companies, including Microsoft. As the Executive Vice President, Mike helped take the company public in 1995. Before Spyglass, he was with two other start-ups, Multiflow Computer and Celerity Computing, both UNIX systems pioneers. Mike began his career at Prime Computer. Mike earned his B.S. in Business Administration at the University of New Hampshire.


Bryan Roberts

Bryan joined Venrock as a Kauffman Fellow in 1997. He is based in Palo Alto and invests broadly across the healthcare industry. Bryan is currently involved with numerous public and private companies including 10X Genomics, Castlight Health, Devoted Health, Doctor on Demand, Encoded Therapeutics, Grand Rounds, Inscripta and Lyra Health. Past investments include Ariosa Diagnostics (acquired by Roche), athenahealth (NASDAQ: ATHN), Ikaria (acquired by Mallinckrodt), Illumina (NASDAQ: ILMN), Ironwood Pharmaceuticals (NASDAQ: IRWD), Sirna Therapeutics (acquired by Merck), and Zeltiq (acquired by Allergan). Bryan was named a Henry Crown Fellow by the Aspen Institute in 2006 and has ranked on Forbes’ Midas List twelve times, 2008 – 2020. In 2019, the National Venture Capital Association presented him with the Excellence in Healthcare Innovation Award.

Immediately prior to joining Venrock, Bryan received his Ph.D. in Chemistry & Chemical Biology from Harvard University. He received his B.A. from Dartmouth College.

Brian Ascher

Brian Ascher joined Venrock in 1998 as a Kauffman Fellow and is currently a Partner based in Venrock’s Palo Alto office.

Brian invests broadly across Enterprise and FinTech and currently serves on the Board of Directors of several companies, including Personal Capital, 6Sense, Socrates AI, Dynamic Signal, Retail Solutions, SmartBiz Loans, and Inrix. Past investments include Vocera (NYSE:VCRA), ADiFY (acquired by Cox Enterprises), DATAllegro (acquired by Microsoft), Atrenta (acquired by Synopsys), Redbeacon (acquired by Home Depot), Tudou (acquired by Youku), RelayHealth (acquired by McKesson) and Unicru (acquired by Kronos). Prior to Venrock, Brian was a Senior Product Manager at Intuit responsible for Quicken and Quicken.com, and earlier in his career was a Strategy Consultant at the Monitor Group. Brian has been named to the Forbes Midas List multiple times. Brian received his B.A. from Princeton University and his M.B.A. from Stanford University Graduate School of Business.


David Pakman

As a Partner at Venrock in New York, David focuses on early stage venture investing in consumer and enterprise tech companies with a recent focus on robotics, crypto, consumer products and AI. His active investments include Dstillery, Smartling, Misty Robotics, Simbe Robotics, Amino Apps and Dapper Labs. He led both the Series A and Series B rounds in Dollar Shave Club and sat on the board until that company was acquired by Unilever for $1B in July of 2016. He served on the Board of Crunchyroll (acquired by The Chernin Group) and led Venrock’s investment in Klout which was acquired by Lithium Technologies. In April 2017, he was named the 55th top venture capitalist in the world by CB Insights.

Previously, Pakman was the CEO of eMusic, the world’s leading digital retailer of independent music, second only to iTunes in number of downloads sold. Pakman transformed the business from an obscure also-ran with 50,000 subscribers to the second largest digital music retailer in the world, with more than 400,000 subscribers, $68M in revenue and more than 12% market share. Prior to joining eMusic, Pakman was Co-Founder and President of Business Development and Public Policy at Myplay, Inc., the company he co-founded in 1999 in Redwood City, CA that introduced the “digital music locker” and pioneered the locker category. In 2001, Myplay was sold to Bertelsmann’s ecommerce Group. Before Myplay, he was Vice President at N2K Entertainment, which created the first digital music download service. He also was the co-creator of Apple’s Music Group and a product manager at Apple.

Pakman is a graduate of and a former member of the Board of Overseers at University of Pennsylvania’s School of Engineering and Applied Science with a degree in Computer Science Engineering and is an avid musician and songwriter. He testified in front of Congress regarding internet music streaming in 2012, 2016 and 2017. He also served on the Board of POTS, a human services non-profit in the Bronx helping low-income families and is a Trustee of St. Luke’s School in Connecticut.

Check out David’s blog or follow him on Twitter at @pakman.



Bob Kocher, MD

Bob Kocher, MD is a Partner at Venrock and focuses on healthcare IT and services investments. He currently serves on the Boards of Virta Health, Aledade, Renew Health and Lyra Health as well as Devoted Health, both of which he also co-founded, and the Blue Cross insurance company Premera. He is a Board Observer at Grand Rounds, Stride, Doctor on Demand, and Suki. He is formerly a Director at Jiff and Castlight Health (CSLT).

Additionally, he is an Adjunct Professor at Stanford University School of Medicine and a Senior Fellow and Advisory Board Member at the Leonard D. Schaeffer Center for Health Policy and Economics at USC. He serves on the Advisory Boards of Harvard Medical School Health Care Policy Department and National Institute of Healthcare Management (NIHCM). He is also a member of the Health Affairs Editorial Board.

Prior to Venrock, Bob served in the Obama Administration as Special Assistant to the President for Healthcare and Economic Policy on the National Economic Council. In the Obama Administration, Bob was one of the shapers of the Affordable Care Act focusing on cost, quality, and delivery system reform and health IT policy. He was one of the leaders of the First Lady’s “Let’s Move” childhood obesity initiative, led the formation of the Partnership for a Healthier America, and served on the Federal Advisory Panel charged with developing a national obesity strategy. He also co-founded the Health Data Initiative with Todd Park, a joint effort of HHS and the Institute of Medicine, to release healthcare data to spur private sector innovation to improve healthcare cost and quality.  For five years, he served as Co-Chair of the Health Datapalooza.

Before the White House, Bob was a Partner at McKinsey & Company where he led McKinsey Global Institute’s healthcare economics work. He has worked widely across the US and international healthcare systems to improve regulatory policy, economic performance, labor productivity, clinical outcomes, and patient experience.

Bob received undergraduate degrees from the University of Washington and a medical degree from George Washington University. He completed a research fellowship with the Howard Hughes Medical Institute and the National Institutes of Health, and went on to complete his internal medicine residency training at the Beth Israel Deaconess Medical Center and the Harvard Medical School.