Gustavo Medina, CCIE #51487, is a Senior Solutions Architect who is passionate about helping enterprise customers design and implement secure and scalable architectures. Known for his ability to solve complex problems and connect the dots across technologies, teams, and business requirements, he takes great pride in contributing to the security industry in meaningful and lasting ways. Beyond his customer work, he mentors engineers around the world and enables Cisco partners on emerging technologies. His influence extends across the company through his involvement in reviewing Cisco official certification exams, presenting at Cisco Live, and developing technical content published on cisco.com.

Since joining Cisco in 2009, Gustavo has been recognized as a trusted advisor and respected member of the global security community. Over the course of his career, he has built deep expertise in network security technologies and has served in roles based in Heredia, Costa Rica; Research Triangle Park, North Carolina; and Mexico City, Mexico. He remains committed to excellence, innovation, and advancing the practice of secure network design through clarity, collaboration, and a problem-solving mindset.

Oscar Ramirez, CCIE #68457, is a Senior Solutions Architect with more than 5 years of specialized experience in SASE and more than 15 years in network and security technologies. He excels at bridging business needs with cutting-edge solutions by delivering impactful technical presentations, guiding proof-of-value deployments, and addressing complex pre-sales challenges.

Leveraging industry-leading credentials, including CCIE Security, CISSP, and CCSP, Oscar specializes in competitive positioning and aligning advanced security architectures such as Zero Trust and SD-WAN to customer requirements. His work reflects a commitment to driving innovation, adoption, and measurable business outcomes.

Through close collaboration with stakeholders and cross-functional teams, he ensures technical alignment and strategic value for enterprise clients. Passionate about secure cloud connectivity and multi-domain architectures, Oscar actively contributes to shaping security strategies that empower organizations on their digital transformation journey.

Ryan Shoemaker, CCIE #7405, is a Senior Solutions Architect from Chicago, Illinois, with more than 30 years of technical expertise in cybersecurity, networking infrastructure, and cloud integrations. He enjoys helping customers utilize networking technologies to accomplish meaningful goals. Leveraging his CCIE and CISSP certifications, along with his MBA, he has found success in connecting new capabilities with accomplishing his customers' business goals. Networking is all about connecting, while security is all about protecting, and as such, he has found it critical to implement the right set of capabilities to provide both. He is a passionate content creator who has authored whitepapers, documents, and presentations that he has delivered at different tradeshows throughout his career. He also holds a patent for "Optimizing Application Path Selection for Cloud Apps from a Client." This book marks his first attempt at authorship of this scale, and he hopes readers enjoy reading it as much as he did in helping write it.