Yun Chae Yim

Senior Engineer I

Yun has 19 years of experience designing, implementing, diagnosing, and managing the client’s global WAN, LAN, and Network Security infrastructure.  Yun’s continued pursuit of excellence through education, training, collaboration, and perseverance and thinking outside of the box, allow him to perform at the highest level to accomplish any projects or tasks assigned within the allotted deadline with the client’s satisfaction.


  • Cisco Certified Network Professional (CCNP) - Routing & Switching


The expertise of the NetCraftsmen consultants and the collaborative environment in sharing knowledge for the betterment of the NetCraftsmen family and its clients is second to none.


The excitement of a new adventure in finding a solution to the client’s requests, requirements, and problems and delivering a solution to fulfill all the client’s expectations brings a sense of accomplishment and motivation.


While I enjoy all sports, organized team tennis, such as the USTA adult league, is my passion.  I also enjoy mentoring young adults who seek careers in Information Technology, especially in network engineering and information security.


Nick Kelly

Cybersecurity Engineer, Cisco

Nick has over 20 years of experience in Security Operations and Security Sales. He is an avid student of cybersecurity and regularly engages with the Infosec community at events like BSides, RVASec, Derbycon and more. The son of an FBI forensics director, Nick holds a B.S. in Criminal Justice and is one of Cisco’s Fire Jumper Elite members. When he’s not working, he writes cyberpunk and punches aliens on his Playstation.


Virgilio “BONG” dela Cruz Jr.

CCDP, CCNA V, CCNP, Cisco IPS Express Security for AM/EE
Field Solutions Architect, Tech Data

Virgilio “Bong” has sixteen years of professional experience in IT industry from academe, technical and customer support, pre-sales, post sales, project management, training and enablement. He has worked in Cisco Technical Assistance Center (TAC) as a member of the WAN and LAN Switching team. Bong now works for Tech Data as the Field Solutions Architect with a focus on Cisco Security and holds a few Cisco certifications including Fire Jumper Elite.


John Cavanaugh

CCIE #1066, CCDE #20070002, CCAr
Chief Technology Officer, Practice Lead Security Services, NetCraftsmen

John is our CTO and the practice lead for a talented team of consultants focused on designing and delivering scalable and secure infrastructure solutions to customers across multiple industry verticals and technologies. Previously he has held several positions including Executive Director/Chief Architect for Global Network Services at JPMorgan Chase. In that capacity, he led a team managing network architecture and services.  Prior to his role at JPMorgan Chase, John was a Distinguished Engineer at Cisco working across a number of verticals including Higher Education, Finance, Retail, Government, and Health Care.

He is an expert in working with groups to identify business needs, and align technology strategies to enable business strategies, building in agility and scalability to allow for future changes. John is experienced in the architecture and design of highly available, secure, network infrastructure and data centers, and has worked on projects worldwide. He has worked in both the business and regulatory environments for the design and deployment of complex IT infrastructures.