Ventures and Innovation
Building practical technology businesses around AI, cybersecurity and modern operations.
I build and back technology businesses that share a common thread: practical, applied AI and cybersecurity work that produces measurable results. Each of these ventures serves a different market and maintains its own topical positioning. Grubisa.com explains the leadership and operating perspective connecting them.
Group 4 Networks
Toronto-based managed IT, cybersecurity, cloud and business continuity services for organizations that need dependable technology operations. Visit Group 4 Networks.
The Cyber Arm
A cybersecurity brand focused on assessments, managed protection, security operations and practical risk reduction. Visit The Cyber Arm.
SecureAware
A human-risk testing platform for realistic SMS and voice phishing simulations, measurable risk scoring and executive reporting. Visit SecureAware.
VocalStaff.ai
An applied AI voice-agent platform designed to support business conversations and integrate with existing workflows. Visit VocalStaff.ai.
AI Capital Advisory
AI strategy, implementation, AI agents and process automation for organizations putting applied AI to work. Visit AI Capital Advisory.
MezureAI
AI ROI, business cases, value realization and AI economics for leaders deciding where to invest in AI. Visit MezureAI.
What connects them
Applied AI, cybersecurity and operations, built the same way
Every venture I am involved with is built on the same operating discipline I use to run Group 4 Networks: understand the business problem first, secure what matters, then apply automation and AI where they create measurable value rather than added complexity.
Applied AI
AI connected to real business workflows, measurable outcomes and responsible operational controls.
Cybersecurity
Security integrated into everyday technology operations and human-risk management.
Operations
Better visibility, reduced notification noise and controlled automation across IT operations.