David Yarashus

Principal Architect, Operations Chief Engineer

Over 25 years’ experience in enterprise and service provider networking, network management, and security. David Yarashus loves to work closely and collaboratively with customers to solve their biggest challenges. David Yarashus currently holds expert-level certifications from Cisco in Design as well as Routing & Switching.


  • Cisco Certified Internetwork Expert (CCIE) - Routing & Switching #2292
  • Cisco Certified Design Expert (CCDE) #20120013
  • Certified Information Security Systems Professional (CISSP)
  • Palo Alto Networks Certified Network Security Engineer (PCNSE)


NetCraftsmen has given me opportunities to work with some of the best and brightest minds in the industry. When working with some of our clients, I’ve been able to make a difference at a scale far beyond what I’d ever dreamed when I was getting started.


The great people who make a difference that I get to work with, both as co-workers and our customers.


David Yarashus is a devoted husband and father of eight children, and most of his time outside of work goes to supporting the various sporting activities the family is involved with such as swimming, ballet, cycling, martial arts, and shooting. He is also active in his church and in supporting basic human rights causes.


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.