Meet the team

  • Image of Fiona Nielsen

    Fiona Nielsen

    Founder and CEO

    Bioinformatics scientist specialised in genome analysis with 15 years of experience in software development and project management. Fiona left her job at Illumina Cambridge in 2013 to pursue her vision of enabling efficient genomic data sharing and founded the charity DNAdigest. In August 2014 she founded Repositive as a spin out of DNADigest.

  • Image of Adrian Alexa

    Adrian Alexa

    Co-founder and CTO

    Adrian is a data scientist with expertise in algorithm optimisation and API development. While working at Illumina, Adrian built APIs for Illumina’s BaseSpace environment and tools for extracting statistics out of large genomic datasets. Prior to that he worked as a research associate at Max Planck Institute for Informatics, Germany.

  • Image of Adam Wells

    Adam Wells

    Head of Operations

    Prior to joining Repositive, Adam was Commercial Director at JDR Cables Ltd. leading a team focused on supporting external sales activities by producing winning tenders. Prior to that, he was a Design Engineer with experience in the Offshore, Aerospace and Defence sectors primarily using 3D solid modelling tools. He's also a keen age-group triathlete who has previously represented Great Britain.

  • Image of Jana Grajciarova

    Jana Grajciarova

    UX/UI Developer

    Jana is working on the design and when it is needed she does coding as well. She has a background in graphic design and front-end development. Her favourite tool is pen and paper to quickly sketch out an idea.

  • Image of Charlotte Whicher

    Charlotte Whicher

    Product Manager

    Charlotte comes from an academic background, with experience in genomic data research and a PhD in Infection and Immunity. She understands the need for more data and the difficulties faced by researchers in finding and accessing that data. Her aim is to understand what Repositive users want, and how genomic data Repositories work, so she can help make Repositive into an awesome product.

  • Image of Richard Shaw

    Richard Shaw

    Senior Bioinformatics Scientist

    Richard is working on exploration of genomic data repositories and privacy-preserving querying. He was previously at Illumina, where he developed and assessed algorithms to detect a variety of classes of genomic variants and gained an appreciation of the need for large genomic datasets and their efficent reuse. He has a particular interest in neurogenomics and is curious to know how the human genome specifies those neural circuits that we share.

  • Image of Sebastian Place

    Sebastian Place

    Web Developer

    Computer science graduate with experience in developing web applications. Interested in UI design, functional programming, nature and functional movement...and food.

  • Image of Dennis Schwartz

    Dennis Schwartz

    Bioinformatics Developer

    Dennis recently joined Repositive after graduating with a Master's in Computational Biology from TU Munich. His focus is on backend development and data processing and analysis. On the weekends, you might catch him dancing somewhere or making music as a DJ or bass player.

  • Image of Ruben Paz

    Ruben Paz

    Backend Developer

    Ruben is a Spaniard software developer with experience in frontend, mobile and backend projects. His interests are mainly related with software architecture, functional methodologies, OSS and community driven events.

  • Image of Marek Balint

    Marek Balint

    Lead Software Engineer

    IT professional with almost 15 years of experience in software development, software architecture and leadership roles across a wide range of industries. Marek has a great passion for massive online education, which he uses to expand his knowledge in areas of his interest, mainly software engineering, molecular biology and computational biology. During his free time, he serves as volunteer at the local DYI bio lab, or whizzes somewhere through the Cambridge countryside on his bicycle.

  • Image of Tom Byers

    Tom Byers

    Web Developer

    Tom is developing his frontend web skills as well as advancing his interest in data analytics & UI/UX design. He graduated in 2015 from a Sport & Exercise Science degree at the University of Bath and is a keen cyclist & climber.

  • Image of Steve Williams

    Steve Williams

    Data Scientist

    Steve has a PhD in functional genomics, and prior to joining Repositive did a postdoc screening for genes involved in cancer drug resistance. His focus is to discover new datasets that are of interest to Repositive users. He loves data analysis and visualisation, cycling and veggie gardening.

  • Image of Jack Wilson

    Jack Wilson

    Executive Assistant

    Jack recently joined Repositive after completing a Bachelor’s degree reading Cell Biology at the University of Stirling. He has a keen interest in cancer biology, researching the therapeutic potential of Verlindamycin when targeting acute myeloid leukaemia as his final dissertation project. Jack supports Adrian Alexa and the development team. In his free time, Jack enjoys cycling and rowing.

  • Image of Chris Taylor

    Chris Taylor

    Product Manager

    Chris started out as an evolutionary biologist but strayed into requirements elicitation and then standards development for proteomics and various other academic disciplines. Via stints leading and contributing to various projects he finally joined Repositive to manage the development of their Cancer Models platform. In his spare time he loves off-road cycling, cooking, woodworking and shouting at the television.

  • Image of Anaid Diaz

    Anaid Diaz

    Executive Assistant

    Anaid completed her PhD in Evolutionary Biology, she has developed a variety of research projects and scientific events in areas ranging from population genetics, ImmunoseneScence and infectious diseases, to functional genomics and drug target validation. Working at Repositive across operations, business and product development, she aims to contribute to major pre-clinical discoveries by enabling data access and sharing.

  • Image of Sam Shelton

    Sam Shelton

    Business Development Associate

    Sam recently joined Repositive to work on business development. He has a PhD in protein biochemistry and expertise in molecular biology and bioinformatics. He previously worked as an application scientist at Carl Zeiss before moving to the University of California San Francisco, where he developed novel sampling and analytical strategies to investigate intratumoural heterogeneity of brain tumours. Sam loves photography, building and repairing things, as well as spending time with his family.

  • Image of Ross Rounsevell

    Ross Rounsevell

    Market Development Lead

    Ross is finding and enabling access to the next big market opportunities to deliver on Repositive’s mission. Following a PhD in protein biophysics and a postdoc in bioengineering, Ross left academia to work at the Wellcome Sanger Institute as a business development manager. There, he focused on finding early stage research discoveries and managing their development towards commercial party engagement. When not at his desk, Ross tries to get outside to run, hike, and cycle as much as he possibly can.

The Board

To find out more about our investors, visit our AngelList profile.

  • Image of Steve Gledden

    Steve Gledden


    Steve Gledden is an Angel Investor, EIR, entrepreneur, former CEO, NED, and Executive Chairman with particular expertise in Scale-ups. He has experience in a wide range of industries including life sciences, hospitality, finance and banking, resources, media, online, retail, marketplaces and SaaS. He has worked in investment banking, strategy consulting, internet startups, early stage venture management in media, banking, and semiconductor manufacturing. He has built and sold a life sciences (contract laboratory) organisation that provides testing to large corporates.

  • Image of Jonathan Milner

    Jonathan Milner

    Non-Executive Director

    Jonathan is an entrepreneur and investor and is passionate about supporting UK life science and high-tech startups. He has provided considerable investment and support to over 40 companies and has assisted three technology companies to IPO on the London AIM Stock Exchange.

  • Image of Lennart Hergel

    Lennart Hergel

    Non-Executive Director

    Lennart is an entrepreneurial venture capital investor, with ambition to combine cutting-edge technology and superb founders to create world changing social innovation. He built the UK operation for Ananda Ventures - the pan-European first mover for investing in mission-led enterprises - and serves as board member of Third Space Learning and IESO Digital Health. Lennart also mentors numerous early-stage tech businesses.

  • Image of Pierre Socha

    Pierre Socha

    Non-Executive Director

    Pierre is a Principal of the early stage funds at Amadeus Capital Partners, with a current investment focus on digital health, medical technologies, machine learning, AI and cybersecurity. Prior to joining Amadeus, Pierre spent a decade in the Asian and European biotech industries and brings strategic and operational experience to the portfolio. He is actively leading investments and sits on the boards of Antidote (formerly TrialReach), Congenica, Doctify, Lumeon (formerly Qinec), Inotec, PhoreMost and Repositive.

  • Image of Victor Szilagyi

    Victor Szilagyi

    Non-Executive Director

    Victor has crafted cross-platform products and services for some of the world’s largest consumer electronics, media and telecoms companies. Victor is a named inventor on more than 12 patents. He holds degrees in Psychology and Urban Design from New York University as well as an MFA in Interaction Design from the Interaction Design Institute Ivrea (IDII).

People who helped us on the journey:
  • Image of Hector Huertas

    Hector Huertas

    DevOps Engineer

  • Image of Katie Hague

    Katie Hague

    Office Administrator

  • Image of Alexander Brinkmann

    Alexander Brinkmann

    Intern Data Scientist

  • Image of Nadia Kovalevskaya

    Nadia Kovalevskaya

    Scientific Liaison

  • Image of Craig Smith

    Craig Smith

    Marketing Manager

  • Image of Manuel Corpas

    Manuel Corpas

    Scientific Lead

  • Image of Alexandra Ponomarenko

    Alexandra Ponomarenko

    Business Development Intern

  • Image of Martín Rubio

    Martín Rubio

    Web Developer

  • Image of Daniel Jason Binks

    Daniel Jason Binks

    Marketing Assistant

  • Image of Kateryna Mishina

    Kateryna Mishina

    Executive Assistant

  • Image of Amanda McMurray

    Amanda McMurray

    Interim CFO

  • Image of Daniel Gynn

    Daniel Gynn

    Frontend Developer

  • Image of Jose Moreira

    Jose Moreira


  • Image of Matthew Young

    Matthew Young

    Data Scientist

  • Image of Tim Richardson

    Tim Richardson

    Software Developer

  • Image of Xocas Cardama

    Xocas Cardama

    Operations Manager

  • Image of Margi Kolchagova

    Margi Kolchagova

    Communications Assistant

  • Image of Francis Menson

    Francis Menson

    UX Developer