Sebastian Dewar

Seb has over 25 years of experience working with a broad range of mainframe technologies. He began his career as a z/OS systems engineer with large French organizations, including Credit Agricole (France’s largest bank) and La Poste. He held successively responsible z/OS infrastructure and application development positions throughout his career in the banking and financial services industry. Seb joined Virtel in 2015 as technical support manager and later assumed the role of Virtel CTO, overseeing all technical aspects of the Virtel suite of mainframe access, usability and integration products.

Improving the Mainframe User Experience: A Company’s Journey to a Modern Web Interface

Jan 15, 2025 | Featured, Mainframe, Modernization, Sponsored

Marsh McLennan’s journey to transform a crucial 3270 application into a modern web interface Modernizing business applications is a critical need for many large enterprises that rely on these powerful legacy systems for their core operations. This blog post...