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Sabrina Castiglione
Chief Operating Officer at Pento (Ex-Tessian CFO)
Professional Background
Sabrina Castiglione is a highly accomplished Chief Operating Officer at Pento, a B2B SaaS company revolutionizing the payroll landscape. With an innovative approach to payroll that aligns with the demands of 2022, Sabrina has leveraged her extensive background in finance and operations to drive Pento's growth and establish it as a leader in the space. Before joining Pento, she served as the Chief Financial Officer (CFO) at Tessian, a prominent enterprise email security company, where she played a critical role in enhancing the organization's operational efficiency and financial strategies.
Sabrina’s versatility is highlighted by her roles at Tessian, where she not only excelled as CFO but also took on the responsibilities of Acting Head of Talent and Acting Head of People. This multifaceted experience demonstrates her commitment to integrating financial leadership with a deep understanding of talent management and people operations, a combination that is essential in today's dynamic business environment.
Education and Achievements
Sabrina graduated with a Master of Science with Honours (MSci Hons.) in Chemistry from Imperial College London, one of the top universities globally, renowned for its rigorous academic standards and vibrant research culture. Her educational foundation provided her with a strong analytical mindset, which she has successfully applied in her finance roles. Prior to her university studies, Sabrina achieved outstanding A-Level results at Haileybury UK, securing five A grades in subjects including Maths, Further Maths, Chemistry, Philosophy, and Latin.
Her qualifications as an Association of Chartered Certified Accountants (ACCA) and Chartered Global Management Accountant (CGMA) from CIMA further solidify her expertise in accountancy and corporate finance. These credentials have equipped Sabrina with the necessary skills to navigate complex financial landscapes and make strategic decisions that favor organizational growth.
Contributions to Diversity and Inclusion
Sabrina is passionate about promoting diversity and inclusion within the tech space, which is reflected in her active roles in various organizations. As the former Chair of the Young Professionals' Board at the WISE Campaign, she has contributed her insights and time to advocate for women's representation in STEM careers. Her commitment to diversity is further demonstrated by her role as a co-founding organizer of WEDS - Women Empowering Diversity in Startups. Additionally, Sabrina previously served on the WISE YP Board, which focuses on educating and encouraging young women to pursue careers in STEM fields.
As a mentor during her time at Exscitec, Sabrina not only shared her knowledge but also nurtured the next generation of talent, helping them navigate their academic and professional journeys. Her leadership and mentorship initiatives have positively influenced many aspiring professionals, making a difference in their career paths.
Career Development & Vision
Sabrina began her career with pensions actuarial roles at various companies, which provided her with foundational knowledge in finance and numbers. This experience was pivotal in shaping her approach to financial management, as she transitioned to serving as Chief of Staff at Tessian and later as a Director and Developer at S Castiglione Limited.
Her diverse experiences have been instrumental in enhancing her strategic thinking and operational efficiency. Sabrina's journey exemplifies the significance of continuous learning and adapting in the ever-evolving tech landscape. As she leads Pento, Sabrina focuses not only on operational success but also on fostering an inclusive workplace culture conducive to innovation and growth.
Overall, Sabrina Castiglione stands out as a dynamic leader with a rich blend of financial expertise and commitment to diversity, making significant contributions to both her organization and the broader community. Her journey and achievements are an inspiration for many, showcasing the potential of integrating finance with a proactive approach to people management and organizational culture.

