Peter Roumeliotis

Peter
Roumeliotis

Cybersecurity Professional & Full-Stack Developer building secure, intelligent systems.

Cybersecurity & DFIR Investigative Analyst | Full-Stack Developer @ T&M USA

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About Me

Securing Systems.
Building Solutions.

I hold a B.S. and M.S. in Computer Science (with a focus in Data Science and Artificial Intelligence) from St. John's University. With a passion for cybersecurity, digital forensics, and full-stack development, I bring a unique blend of security expertise and software engineering skill to every project.

Currently working as a Cybersecurity & DFIR Investigative Analyst and Web Developer at T&M USA, I specialize in incident response, threat analysis, and building secure web applications. My experience spans from working alongside the FBI at InfraGard to developing production applications with modern frameworks.

Trilingual in English, Greek, and Spanish — I thrive in diverse, collaborative environments and bring strong communication skills to technical teams.

3
Certifications
M.S.
Computer Science
3
Languages Spoken
4+
Years Experience
Career

Experience

AUG 2025 — PRESENT
Cybersecurity & DFIR Investigative Analyst | Full-Stack Developer
T&M USA
  • Maintaining a Laravel enterprise platform (PHP, MySQL, jQuery/AJAX) generating five-figure monthly revenue — managing AWS infrastructure, APIs, authentication, and database architecture with continuous cloud deployment, scaling, and security hardening
  • Conducting DFIR investigations, malware analysis, dark web monitoring, and social media/OSINT intelligence analysis
  • Collaborating with attorneys on pre-litigation matters including due diligence, cyber forensics, surveillance, and social media monitoring
  • Performing network reconnaissance and application security testing with Nmap and Burp Suite, translating findings into production security improvements and incident response
AUG 2024 — OCT 2024
Website Developer & Social Media Manager
Women in Cyber Leadership
  • Developed the organization's website and managed their social media presence across platforms and LinkedIn
  • Created posts and content to drive engagement; presented progress weekly to leadership
MAY 2024 — OCT 2024
Cyber Security Intern
New York Metro InfraGard
  • Participated in weekly events bringing together critical infrastructure owners, operators, and the FBI for education, information sharing, and emerging threat workshops
  • Delivered presentations on critical vulnerabilities, threat vectors, and mitigation strategies for national infrastructure
  • Developed cybersecurity marketing initiatives including podcast production and branded challenge coins
  • Analyzed risk management frameworks, threat vectors, and network security in collaborative sessions
JUL 2022 — AUG 2022
Software Engineer
CTS Logistics
  • Built a Java-based asset and inventory tracking system backed by MySQL, managing package statistics and data as database administrator
  • Presented the system to the company, demonstrating how it could streamline their asset tracking operations
Work

Projects

🔐
Electronic Health Record System
St. John's University · CUS 1156 · Software Design Methods
A comprehensive EHR system tracking patient admissions and discharges with enforced access controls, IAM management, and segregation of duties. Features a patient portal with medications and doctor's notes.
IAM Database Security Java
📱
Phi Delt Connect
St. John's University · CUS 742 · Mobile App Development
An iOS social networking app built with SwiftUI and Firebase featuring real-time data, user auth, dynamic post feeds, comments, likes, follow/unfollow, personalized "For You" tab, and integrated search.
SwiftUI Firebase iOS Real-time
🔥
AI Fire & Smoke Detection
Research Project · Computer Vision · Deep Learning
A deep learning research project comparing a custom CNN and fine-tuned YOLOv8 Nano for real-time wildfire detection. Features Grad-CAM visualizations, video processing with detection overlays, and side-by-side model comparison.
TensorFlow YOLOv8 Computer Vision Python
🏥
SJU Health Center System
St. John's University · CUS 1166 · Software Engineering
A Java desktop application for managing patient healthcare records, appointments, and billing. Features separate patient and employee portals with role-based access control, appointment scheduling, and medical records management.
Java MySQL Java Swing JDBC
🐾
Critter Simulation
St. John's University · Java · Simulation
A grid-based animal simulation where 125 critters with unique movement patterns roam a wrapping 100x50 world and compete for survival through collisions. Features a real-time Swing GUI with start, stop, and step controls.
Java Java Swing OOP Simulation
🎙️
Voice AI Network Scanner
Research Project · Voice AI · Network Security
A voice-first network security tool combining VAPI, Claude Sonnet, and nmap. Speak commands to trigger WiFi subnet scans, enumerate devices and ports, and receive structured risk assessments (CRITICAL → LOW) delivered back via natural speech.
Python FastAPI VAPI Claude Sonnet nmap
📈
Stock Price Forecasting
St. John's University · AI in Finance · Capstone Project
A comprehensive comparison of ARIMA, LSTM, and GRU models for stock price prediction across three market sectors. Neural networks achieved 64-82% RMSE reduction over classical models, with GRU emerging as the best balance of accuracy and efficiency.
LSTM ARIMA Python Time Series
Expertise

Skills & Technologies

💻 Languages
Java JavaScript Python C++ Swift Scala SQL PHP
⚡ Frameworks & Tools
React Node.js Next.js Flask SwiftUI Firebase MySQL Laravel Vue.js Bootstrap Tailwind CSS jQuery Chart.js TensorFlow Keras Java Swing JDBC
🛡️ Security
Cybersecurity DFIR IAM / Access Controls Vulnerability Mgmt Threat Analysis Risk Management
☁️ Cloud & AI
AWS Cloud Computing Machine Learning LLMs CNNs Computer Vision YOLOv8 LSTMs Time Series APIs MCPs
🤝 Professional
Public Speaking Leadership Data Analysis Collaboration Law Enforcement Liaison Trilingual
Credentials

Certifications

☁️
AWS Certified Cloud Practitioner
Amazon Web Services
🏗️
AWS Solutions Architect – Associate
Amazon Web Services
🔍
Cellebrite CCPA Certified
Cellebrite

Resume

Download PDF
peter@portfolio — ~/resume
peter@portfolio:~$ 

Let's Connect

I'm always open to a great conversation about cybersecurity, software development, or anything in between. Let's connect.

proumeliotis07@gmail.com LinkedIn GitHub