Douglas E. Williams, PhD

Chairman of the Board,
Non-Executive Director


Douglas E. Williams, Ph.D. is a seasoned industry leader with...

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… over 30 years of experience in the U.S. biotechnology industry. He currently is President and Chief Executive Officer and member of the Board of Codiak BioSciences. He was previously Executive Vice President, Research and Development, at Biogen. Prior to that he was Chief Executive Officer and member of the Board of ZymoGenetics. ZymoGenetics was purchased for $985 million by Bristol-Myers Squibb during Dr. Williams’ tenure. Other leadership positions have included Chief Scientific Officer and Executive Vice President of Research and Development at Seattle Genetics and Senior Vice President and Washington Site Leader at Amgen. Dr. Williams also served in a series of leadership positions over a decade at Immunex, including Executive Vice President and Chief Technology Officer. He has contributed to the development of several novel drugs, including Enbrel® (etanercept), Tecfidera® (dimethyl fumarate), and Spinraza® (nusinersen). He is currently a member of the Board of Directors of Ovid Therapeutics, and Chairman of the Board of AC Immune.

Francesco De Rubertis, PhD

Non-executive Director


Francesco De Rubertis is a Partner and co-founder of Medicxi, one of the largest Biotech Venture...

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…Capital firms in Europe, which was created in January 2016. Having completed his Post Doc at M.I.T. he joined Index Ventures in 1997 to launch the Life Sciences practice. This is where he spearheaded the creation and adoption of the asset-centric investment strategy which had an immediate impact on the success and growth of the firm.

Francesco’s investments include CellZome (acquired by GlaxoSmithKline), Egalet (Nasdaq: EGLT), GenMab (Copenhagen: GEN.CO), GenSight Biologics (Euronext: SIGHT), Micromet (acquired by Amgen), Minerva Neurosciences (Nasdaq: NERV), Molecular Partners (Swiss: MOLN.SW), PanGenetics (acquired by Abbott), Parallele Biosciences (acquired by Affymetrix, Nasdaq: AFFX), Profibrix (acquired by The Medicines Company). 

Francesco received a B.A. in Genetics and Microbiology from the University of Pavia (Italy) and a PhD in Molecular Biology from the University of Geneva (Switzerland) after which he became a postdoctoral scientist at the Whitehead Institute at M.I.T. He is a Chartered Financial Analyst and serves on the main board of the University of Geneva (Switzerland).

In November 2017 Francesco was named in the first “Bloomberg 50” having been nominated, in the Tech & Science sector, as one of the Top 50 entrepreneurs and innovators who helped to define Global Business in 2017. Francesco has served as Board Observer for Xenikos since 2018.

Jake Simson, PhD

Non-executive Director


Jake Simson is a Partner at RA Capital Management, where his primary responsibility...

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…is to conduct due diligence on biotechnology companies. Prior to this role, Jake was a Senior Associate on the Landscape Team within the TechAtlas division of RA Capital, where he mapped competitive landscapes in the solid tumor oncology space and performed in-depth analyses of pharma pipelines. In addition to being a board member of Xenikos, Jake also acts as an observer on the board of Arvinas. Jake holds a BS in materials science and engineering from MIT and a PhD in biomedical engineering from Johns Hopkins University. In his doctoral research, he investigated clinically translatable treatments for musculoskeletal tissue repair using injectable hydrogels.

Mark Hensley, BSc

Non-executive Director


Mark Hensley is the Chief Executive Officer at Veloxis Pharmaceuticals, Inc., having served previously as...

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…their National Sales Director, Vice President and Head of Sales, and Chief Commercial Officer.

Prior to joining Veloxis, Mark held senior leadership positions at Cornerstone Therapeutics, Inc. and Chiesi USA, Inc.

Mark has more than 15 years of experience in a variety of pharmaceutical leadership positions, with a focus on group purchasing organizations and large IDN (Integrated Delivery Network) contracts as well as various senior sales leadership positions.

Mark received his BSc in Biology, with a minor in Chemistry, from the University of North Texas.

Rogier van den Braak, CPA

Non-executive Director


Rogier van den Braak is currently the Chief Executive Officer at Sanquin Holding B.V., which...

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…manages the commercial activities of the Sanquin group. Prior to this, Mr. Van den Braak was the Chief Financial Officer at Sanquin Blood Supply Foundation after serving in various financial roles at Sanquin. Before joining Sanquin, Mr. Van den Braak served as Audit Director at the Audit Agency for the City of Amsterdam. In addition to serving on Xenikos’ board, Mr. Van den Braak also serves as a supervisory board member for the ETB-BISLIFE Foundation and as the director of the Landsteiner Foundation for Blood Transfusion Research (LSBR). Mr. Van den Braak received his MSc in Finance and Business Economics from the Vrije Universiteit (VU) Amsterdam and is registered as a Chartered Accountant in the Netherlands.

Ypke van Oosterhout, PhD

Founder and Chief Executive Officer


Ypke van Oosterhout is the Founder and CEO of Xenikos BV and the pioneering scientist behind...

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…T-Guard®’s development. Ypke discovered T-Guard while working in the Hematology Department of Radboud University Medical Center (Nijmegen, the Netherlands) after earning his MSc in biology from the University of Nijmegen. Recognizing T-Guard’s clinical potential, Ypke focused his PhD study on its mode of action, safety and efficacy.

On the basis of early positive clinical results, Ypke was awarded a STIGON Grant from the Dutch government initiative supporting entrepreneurship and research into innovative medicines, to continue exploring the clinical and commercial potential of T-Guard.  T-Guard was further developed at Immunotoko BV, a company founded by Ypke with the Radboudumc and Henogen (now Novasep Belgium). Ypke then founded Xenikos BV in 2009 to continue the development of T-Guard through registration for marketing approval as an orphan drug for the treatment acute Graft-Versus-Host Disease (aGVHD), as well as other indications.

Derek DiRocco, PhD

Board Observer


Derek DiRocco is a Partner at RA Capital Management, LLC, a multi-stage investment manager...

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…dedicated to evidence-based investing in healthcare and life sciences, including companies developing novel drugs, medical devices, and diagnostics. Derek works on both public and private investments and serves as a Board Director for 89Bio, Ltd. Previously, Derek covered solid tumor oncology landscapes. Derek holds a BA in Biology from Holy Cross College and a PhD in Pharmacology from the University of Washington. He conducted his postdoctoral research at Brigham and Women’s Hospital/Harvard Medical School, where he researched the role of the Wnt signaling pathway in mouse models of kidney disease, and was part of a team that discovered a stem cell subtype responsible for solid organ fibrosis.

Derek has been Board Observer for Xenikos since 2018.

Ira Duarte, BSc

Observer on the Board


Ira Duarte is currently the Chief Financial Officer at Veloxis Pharmaceuticals, Inc., having...

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…served previously as their Controller and Vice President of Finance.

Prior to joining Veloxis, Ira served as the Senior Director of Corporate Finance at Chiesi USA. She was also the Director of Accounting and Financial Planning at Cornerstone Therapeutics, and was a core member of the team that negotiated the sale of Cornerstone Therapeutics to the Italian pharmaceutical company Chiesi Farmaceutici S.p.A.

Before transitioning to an in-house position, Ira held several roles from Staff Member to Senior Manager at Ernst & Young, managing financial statement audits, SEC filings, and IPOs for various clients.

Ira has more than 25 years of experience in a variety of finance and accounting positions, including 10+ years in the pharma industry.

Ira received her BS in Accounting from Florida Atlantic University and is a Certified Public Accountant.


Viktor Mattousch, MSc, MBA

Board Observer


Victor is Senior Investment Manager at Oost NL. He is responsible...

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… for acquiring, managing and exiting investments across all life sciences areas with an emphasis on medtech. He was amongst others closely involved in the investments in NovioGendix (sold to MDxHealth), Lead Pharma and Mellon Medical. He currently serves as a board observer for Mellon Medical, Encapson, Check-Points, Sigmascreening, Soteria Medical and Gatt Technologies. Viktor has more than 15 years of experience in venture capital. At first as investment officer at Triodos Venture Capital Fund and from 2005 as senior investment manager at Oost NL Capital. He has a background in engineering (MSc. TU Delft) and business administration (MBA, UC Berkeley).