21CS has major offices in the US and Germany with its  Center of Excellence in Australia. With plans to open an additional Center of Excellence in Greece, 21CS is continuing to grow its portfolio, employee base, and revenue.

Nick Pachnos


Nick Pachnos is the CEO of 21CS with over 35 years of experience in the IT industry. Prior to joining 21CS Nick was the V.P. of development for BMC Software’s mainframe solutions and product management teams. He is recognized as an industry leader in the development of innovative software solutions which are used by some of the largest companies worldwide. Nick is also a volunteer firefighter and EMT for his local community with several awards for his community involvement.

Rebecca Levesque

Rebecca Levesque

Chief Sales Executive

Rebecca Levesque has been with the company since its initial start over 30 years ago. She was instrumental in growing 21CS from a small start-up to a respected and well-known global organization. Rebecca is a sought after and proven “Go To Expert” and IBM Champion with market knowledge in the areas of mainframe risk, resiliency, and optimization. She has traveled the world as an expert speaker on the trends and drivers of mainframe legacy environments, and is a published author in trade journals, white papers, and industry forums.

Currently as Chief of Sales, she uses her expertise to maximize the relationships with customers and partners, and tie business value to technical solutions in order to grow 21CS and enhance the IBM Z ecosystem. 

Al Hanna

Al Hanna


Part of Al Hanna’s responsibilities as Chief Operating Officer are to engage with counsel to execute agreements, develop procurement relationships, and manage partner programs. Additionally, Al coordinates budget projections, review & analysis of royalty receipts, designs / implements incentive compensation, and participates in deal analysis.

As COO, Al also has functional responsibility for the Technical Sales, Implementation, Migration, and L2 Support teams. Al brings over three decades of experience in customer success / advocacy, client relationships, personnel and project management, sales engineering, and business development.

Eduardo Ciliendo

Eduardo Ciliendo

VP, New Business Development

In his role as 21CS Chief Business Officer, Eddy uses his background in digital transformation, artificial intelligence, cyber resiliency, and hybrid cloud to define and implement 21CS corporate strategy and foster trusted partnerships with clients and the z/OS ecosystem. Eduardo. Eddy is passionate about sharing his expertise and he has written multiple thought leadership articles on cloud, mainframe modernization and cyber resiliency as well as co-authored a number of IBM Redbooks.


Gonzalo Muelas Serrano

Gonzalo Muelas Serrano

VP, Research & Development , VSE

Gonzalo began his career at 21CS in June 2021, when he became the Head of Research & Development, Product Manager, and Sales and Business Executive for 21CS VSEn, as well as the Managing Director of Teracloud GmbH. Gonzalo is passionate about the future of the VSE environment and has built an equally motivated VSE team of developers in Stuttgart, Germany. Widely known as an IBM zSystems, VSE z/VM, and Linux on Z expert, Gonzalo is a leader in the VSE community.

21CS is a leader in the development of software solutions that are designed to create value across the business and IT spectrum.




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