Mimecast Leadership

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    Marc van Zadelhoff

    Chief Executive Officer

    Marc van Zadelhoff joined Mimecast as the company's second CEO and member of the board in January 2024, where he will lead all aspects of the business and guide the company as it enters its third decade of operation.

    He is an accomplished executive with 25 years of experience in the cybersecurity industry. Prior to joining Mimecast, Marc was the CEO of Devo Technology, a cloud-based logging platform that he led through an intense growth phase where they raised $350M and tripled revenues. He also spent time as COO at LogMeIn, and was GM /CEO of IBM Security, an IBM Business Unit that he co-founded. Under his leadership, IBM Security grew to 8,000 employees and $2.5 billion in revenue.

    Marc is a curious and committed leader that puts Mimecast’s 2,200+ employees first and works alongside them to ensure customer organizations can work protected. He was born in the Netherlands and currently resides in the Boston-area with his wife and three daughters. He holds an MBA from The Wharton School of the University of Pennsylvania and obtained a B.A. from Bowdoin College.

    Janet Prosper

    Chief Human Resources Officer

    Janet Prosper was named Chief Human Resources Officer in November 2023. She joined Mimecast in February 2020 as Senior HR Director and has served as interim CHRO since October 2022, and Vice President, Human Resources, since May 2021. Janet leads Mimecast’s diversity, equity, and inclusion initiatives and partners with the executive team to shape the company’s people and organization’s strategic roadmap, driven by 'The Mimecast Way’ values.

    Janet has nearly three decades of experience leading HR teams in large, global organizations. A considerable part spent working in software/technology organizations undergoing transformation. She also held senior leadership roles with global responsibilities at CareerBuilder, Ciena and Equifax.

    During her career she has led all aspects of human resources: transformation, organizational design, change management, culture and employee offering, talent management, and leader development.

    Janet has a Bachelor of Arts degree in Business Administration and Human Resources from the University of Westminster.

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    David Call

    Chief Financial Officer

    David Call joined Mimecast in May 2023 as Chief Financial Officer. He is an accomplished finance executive with over 20 years of leadership experience in high tech and enterprise software environments. As CFO, Call helps shape the company’s strategic roadmap and plays a key role in helping Mimecast exceed its growth and financial goals, while fostering a collaborative, values-driven culture. Call most recently served as CFO with defi Solutions. Previously, he spent 7 years at McAfee where he served as business unit CFO for both consumer and enterprise security divisions. Call also spent more than 10 years at Intel in various senior leadership finance roles, including their Software & Services Group and the Intel Platform Security Group, before taking a leadership role at McAfee following Intel’s acquisition.

    Call has a BS in Accounting from Brigham Young University and an MBA in Finance from UCLA.

    David Raissipour

    Leiter Technik & Produktverantwortlicher

    David kam im Jahr 2021 als Chief Technology & Product Officer (CTPO) zu Mimecast. Er wird das Produktmanagement und die technischen Abteilungen von Mimecast in einem vollständig integrierten Team zusammenführen. Raissipour wird die Strategie des Unternehmens unterstützen, Innovationen im Dienste von Kunden und Partnern zu beschleunigen.

    Bevor er zu Mimecast kam, war David von 2016-2020 Senior Vice President, Sophos Cloud Platform Group & Sophos Messaging Security Group bei Sophos. Er verfügt über Erfahrung in einer Vielzahl von Unternehmenssoftwareprodukten und war vor seinem Wechsel zu Sophos in leitenden Positionen bei Carbonite und RSA tätig. Er war 14 Jahre lang bei der Microsoft Corporation tätig, wo er zahlreiche Führungspositionen innehatte.

    David hat einen Bachelor of Science in Computerwissenschaften von der Central New England University.

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    Norman Guadagno

    Chief Marketing Officer

    Norman Guadagno joined Mimecast in November 2022 as Chief Marketing Officer. With over 20 years of B2B and B2C marketing experience, Guadagno oversees Mimecast’s marketing organization, and plays a critical role in accelerating the company’s product-led growth strategy via revenue and customer acquisition, storytelling, and channel partner initiatives.

    Guadagno has deep expertise leading business transformation initiatives, including brand building and GTM strategy, within competitive markets. Prior to Mimecast, he served as CEO of Norbella, a full-service media agency that partners with a range of brands like athenahealth, Boston Symphony Orchestra, and Cybereason. Prior to Norbella, Guadagno was the Chief Marketing Officer of Acoustic, a marketing and customer experience SaaS company, where he oversaw the company’s corporate marketing, strategic branding, and GTM initiatives. He has also held senior marketing roles at Carbonite, Microsoft, and Oracle.

    Guadagno holds a Master of Arts degree in psychology from Rice University and a Bachelor of Arts degree in psychology from the University of Rochester.

    Mick Paisley

    Chief Security and Resilience Officer

    Michael Paisley kam im Jahr 2020 als Chief Security and Resilience Officer zu Mimecast. Mit fast 20 Jahren Erfahrung als CISO in multinationalen, hochgradig zielgerichteten und stark regulierten Organisationen ist Mick Paisley mit den sich ständig weiterentwickelnden Schnittstellen zwischen Cybersicherheit, Widerstandsfähigkeit, quantitativen Risiken und fortschrittlicher Datenanalyse bestens vertraut.

    Im Laufe seiner Karriere hat Mick erfolgreich effiziente bedrohungs- und risikobasierte Cyber-Resilienz-Strategien entwickelt und umgesetzt, die das Gesamtrisiko von Cyber-Verlusten reduziert und gleichzeitig die Produktivität der Mitarbeiter in mehreren großen und komplexen Unternehmen erhöht haben. Bevor er zu Mimecast kam, war er CISO bei Verifone Inc, einem globalen Zahlungsanbieter. Zuvor war er CSO bei Vocalink, einem Bestandteil der kritischen nationalen Infrastruktur Großbritanniens, wo er erfolgreich die erste formelle CBEST-Prüfung einer Finanzdienstleistungsorganisation mit vollständiger Transparenz des Prozesses für die wichtigsten Beteiligten leitete. Davor war er bei Santander UK für alle Aspekte der Cyber-Resilienz, des digitalen Risikos, der elektronischen Betrugsbekämpfung, der Geschäftskontinuitätsplanung und des Krisenmanagements verantwortlich.

    Mick hat einen Bachelor of Laws und einen Master of Science in Security and Organizational Risk Management von der University of Leicester.

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    Chris Dollase

    Chefsyndikus

    Chris Dollase kam im Oktober 2017 als Deputy General Counsel, Vice President und Chief Compliance Officer zu Mimecast. Im Februar 2023 wurde er zum General Counsel und Senior Vice President befördert, um die Teams für Recht, Compliance und Sicherheit, Risiko und Kontrolle bei Mimecast zu leiten. Chris und sein Team arbeiten daran, allen Mitarbeitern von Mimecast eine geschäftsorientierte Rechtsberatung zu bieten. Das Team hält Mimecasts Kultur der Integrität und Compliance aufrecht, während es gleichzeitig die Wachstumsstrategie des Unternehmens umsetzt.

    Das Rechtsteam von Mimecast unterstützt über 40.000 Kunden dabei, geschützt zu arbeiten und in einer sich ständig verändernden Bedrohungslandschaft erfolgreich zu sein. Chris ist eine erfahrene Führungskraft im Bereich Cybersicherheit, die 15 Jahre bei RSA, der Sicherheitsabteilung von EMC, gearbeitet hat, bevor sie zu Mimecast kam. Er war Chefsyndikus bei RSA und stellvertretender Chefsyndikus bei EMC und gehörte dem Führungsteam von RSA an.

    Chris hat Mimecast während seiner Amtszeit durch sieben Akquisitionen geführt und spielte zuletzt eine wichtige Rolle bei der Übernahme durch Permira im Mai 2022. Chris hat einen Doktortitel der University of Maryland Francis King Carey School of Law und einen Bachelor of Arts in Geschichte vom Middlebury College.

    David Helfer

    Chief Revenue Officer

    David Helfer joined Mimecast in January 2023 as Chief Revenue Officer. He is an accomplished go-to-market executive with extensive global leadership experience in highly complex infrastructure and security organizations. As CRO, David will lead Mimecast’s global sales organization and help drive its short- and long-term revenue goals.

    Prior to Mimecast, David served as vice president of enterprise sales, Americas at GitLab, Inc. His successful international background also includes time as a senior vice president at F5, leading worldwide channels and EMEA sales based in London, UK. David also spent 14 years at Juniper Networks where he helped grow revenue streams in various executive roles.

    David holds a Bachelor of Arts degree in Political Science from Kalamazoo College.

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