DiPiazza - Resume

Professional Summary

Technical professional with experience across VoIP infrastructure, MSP security engineering, and application QA testing. My background includes Linux-based Asterisk systems, SIP/DNS/NAT troubleshooting, Microsoft 365 administration, endpoint security deployment, and EDR policy optimization.

Currently focused on REST API validation and security-focused testing, I develop structured test cases in Qase, perform regression and release validation, and identify functional and authentication vulnerabilities before production. I bring a security-first mindset to application testing, combining infrastructure knowledge with quality assurance to improve system reliability and reduce production defects.

Certified in CompTIA Security+, CySA+, PenTest+, Linux+, Network+, AWS Cloud Practitioner, and ITIL v4.

Experience

QA Tester (Quality Assurance Engineer)

Telecom company | Nov 2025 - Present

Administer and develop structured test cases in Qase, establishing scalable QA documentation and standardized testing workflows. Validate REST API integrations and perform security-focused testing to identify functional and authentication vulnerabilities. Reproduce, document, and track defects through Git-based workflows, accelerating development feedback cycles. Execute regression and release testing to reduce production defects and improve overall platform reliability.

MSP Solutions Engineer

Telecom company | Jun 2025 - Nov 2025

Led post-sales onboarding and deployment of security platforms including SentinelOne, NinjaOne, BlackPoint, Pax8, Bitwarden, IRONSCALES, and NordLayer VPN. Administered and secured Microsoft 365 tenants (Exchange, Teams, SharePoint, licensing, conditional access). Investigated and remediated security alerts, tuning EDR and email security policies to reduce false positives and improve response times. Served as primary technical contact for ongoing cybersecurity support, firewall configuration, and policy enforcement.

Lead Technical Account Manager (Tier 2 Engineer)

Telecom company | Apr 2024 - Jun 2025

Served as Tier 2 escalation lead under the ITIL v4 framework, resolving complex VoIP, networking, and infrastructure incidents while maintaining SLA compliance. Optimized Linux-based Asterisk systems, tuning SIP configurations and call routing to improve stability and performance. Led cross-functional VoIP deployments from onboarding through production, ensuring seamless migrations and high client satisfaction. Collaborated with development teams via GitHub to document defects, troubleshoot root causes, and drive permanent system improvements.

Technical Account Manager

Telecom company | Feb 2022 - Apr 2024

Deployed and supported secure, cloud-based VoIP solutions for SMB to enterprise clients (3–200+ endpoints). Configured routers, switches, and firewalls to optimize network reliability and performance. Administered FreePBX/Asterisk environments and performed SIP traffic analysis using Wireshark. Automated diagnostics and monitoring using Bash and AutoHotkey, improving efficiency and resolution times. Promoted from Technical Support Specialist to Technical Account Manager.

PBX Operator

Hospital | Dec 2020 - Feb 2022

Supported hospital PBX operations, ensuring reliable 24/7 telephony service. Partnered with IT to troubleshoot internal telephony issues and optimize call routing workflows.