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Güimar Vaca Sittic

Co-Founder & Co-CEO

Güimar is Co-founder & Co-CEO of Merlin, where he runs technology, product, brand, and fundraising. Raised in Buenos Aires, Güimar came to the U.S. to attend The University of Chicago where he earned a degree in economics with honors. While there, Güimar created and served as the Director of TEDxUChicago.

He has extensive experience building and investing in online marketplaces around the world. In 2009, he co-founded Cenaplus.com, an online reservation platform for restaurants in Latin America, which he led until it was acquired by Restorando.com in 2011. Güimar also co-founded Instacarro.com, an online used-car marketplace in Brazil. He oversaw the company as it grew to over $50M in annual sales and raised over $25M in venture funding. Güimar remains on the board of directors.

In September 2013, Güimar joined seasoned entrepreneurs Fabrice Grinda and Jose Marin to launch FJ Labs, a marketplace focused fund and startup studio. Güimar managed over 200 investments in early and late stage marketplaces. He also led investments in companies like Flexport, Shippo, Reverb, Rappi, Roofstock and many others. He is now a Venture Partner and board member at FJ Labs, where he advises the fund on its overall strategy and investment decisions. As an angel investor, Güimar has had the opportunity to support over 100 ventures including Vettery, Gram Games and Shippo. He currently lives in New York.

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Borja Moreno de los Rios

Co-Founder & Co-CEO

Born and raised in Madrid, Borja moved to London in 2009 to begin his professional career at Goldman Sachs where he spent three years as an interest rated trader. In 2012, Borja left his conventional life in London for Uganda. There he built Matoko Fund, a social enterprise that was not only entrepreneurially fulfilling, but also the genesis of his passion for mission-driven work. The Matako Fund provided micro-leasing services to women in rural regions of Northern Uganda. The success of the Matako Fund ignited Borja’s passion to create technology that would enrich lives similar to those he was able to help in Uganda. Borja knew he would need additional skills to scale even bigger projects, so he enrolled at MIT as a Legatum Fellow and obtained an MBA focused on Technology and Entrepreneurship.

He then moved to California to become a VC investor and ultimately began working at FJ Labs, first as an investor and later as an Entrepreneur in Residence (EIR). It was during this time that he helped create Merlin, a venture that allows him to satisfy his desire to create tech that serves and emboldens the underserved. He has been leading Merlin as Co-CEO since 2016 and is determined to transform the future of jobs. Borja lives in NYC and loves rock climbing. He was featured in Forbes 30 under 30 Spain in 2017.

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William Guillouard

Co-Founder & CMO

William Guillouard holds 20+ years of marketing and entrepreneurial experience. He began his career by founding computer hardware and services business Lys Informatique. In 1994, he transitioned to the world of internet startups and became Marketing Director of Aucland, one of the top three auction sites in Europe. In 2002, he became Business Development Director of Meetic, the third largest dating site in the world. After the successful IPO of Meetic in 2006, William moved from France to New York to help Alec Oxenford and Fabrice Grinda start OLX. At OLX he was responsible for marketing operations, including offline, online, PR and global brand strategy in over 25 countries. William was instrumental in making OLX the leading classified site in Brazil, India, Pakistan, Portugal, Nigeria, Argentina, Colombia, Venezuela, Kenya and more.

William met Güimar Vaca Sittic, Co-Founder and Co-CEO at Merlin, while a Venture Partner and Marketing Advisor at FJ Labs. William lives on Long Island with his family.

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General Catalyst Team

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