Capabilities
Network Architecture & Engineering
Cloud-native network design — Azure Virtual WAN, AWS Transit Gateway — and hybrid connectivity (ExpressRoute, Direct Connect) · SD-WAN · site-to-site and remote-access VPN · BGP / OSPF routing · F5 BIG-IP load balancing and WAF · Cisco Nexus, Catalyst, and ISE · Cisco Meraki · next-generation firewall design · network segmentation and microsegmentation · IPv6 · active-active multi-region resiliency.
Cybersecurity
Zero Trust architecture and security design reviews · identity and network access control (802.1X, NAC, PKI) · network segmentation and microsegmentation · next-generation firewall, IPS, and secure remote access design · SIEM and log analytics · security automation and playbook engineering · NIST SP 800-171 / CMMC 2.0 readiness support · PCI DSS and HIPAA compliance support · FIPS-validated cryptography · security policy and standards development · executive risk reporting.
Infrastructure & Security Automation
Terraform and OpenTofu · Ansible · Python · PowerShell · GitOps and CI/CD (GitHub Actions, Azure DevOps) · policy-as-code · automated provisioning, configuration, and compliance scanning · repeatable audit workflows · FinOps and cloud cost optimization.
AI Automation & Operations
Private, on-premises, and air-gapped large language model deployment (vLLM, Ollama, llama.cpp) · GPU inference on-prem and in the cloud · retrieval-augmented generation and vector search · agentic workflows and tool integration (Model Context Protocol) · AI-assisted security operations and analyst workflows · model evaluation and guardrails.
Background
DMT LLC is led by Radi Tzvetkov, a network and security architect with 15+ years designing and securing resilient infrastructure for global financial institutions and enterprises across Azure, AWS, and on-premises data centers.
Every engagement is delivered by the principal — direct access to the senior engineer, not a bench of juniors. U.S. citizen. B.S. Telecommunications. Former CISSP and CCNP; recertification available where a contract requires it.
Past Performance
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Global financial institution2023–PRESENT
Cloud network architecture and automation across Azure and AWS for multiple business units (via staffing partner). Standardized safe onboarding patterns; built a PowerShell-based cloud cost-management program; automated Cisco device deployment with Terraform, cutting setup time ~40% and reducing configuration drift.
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Global software company2011–2023
Security architect and principal architect for North America and the global WAN. Deployed 802.1X with Cisco ISE and a supporting PKI; enhanced Cisco ASA VPN with dual-factor authentication; led the global WAN replacement to a managed VPN service; delivered monthly enterprise security-posture reporting to senior leadership.
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Small & mid-sized business consulting2022–2023
End-to-end WAN, VPN, and security project delivery. Standardized Meraki VPN designs across client environments; built automated network-audit workflows that made client compliance checks repeatable instead of ad hoc.
Codes
NAICS
Relevant PSC
Contact
- Name
- Radi Tzvetkov, Owner
- Phone
- (678) 460-6946
- [email protected]
- Location
- Alpharetta, GA 30022
- Reference
- rabunai.com