Teaching & Mentorship

I teach computer science as a practical discipline: students should understand the logic, write working code, debug with confidence, and connect classroom concepts to real systems. My teaching covers programming, data, cybersecurity, and applied AI, with an emphasis on clear thinking, ethical computing, and project-based learning.

Programming

C++, Java, Python, object-oriented programming, debugging, and software design fundamentals.

Data & Analytics

Database systems, SQL, data mining, data analysis, dashboards, and reproducible workflows.

AI & Security

Applied AI, NLP, cybersecurity, digital forensics, secure software development, and responsible computing.

Teaching Philosophy

My classroom approach is built around applied understanding. I want students to learn not only what a programming concept means, but also why it exists, where it appears in real software, and how to reason through mistakes when the code does not behave as expected.

I use step-by-step examples, visual explanations, debugging walkthroughs, and project-based assignments to help students move from syntax memorization toward software reasoning. I also emphasize responsible use of AI tools: students may use AI to support learning, but they must understand, explain, test, and defend their own work.

Courses I Teach

John Jay College of Criminal Justice

Department of Mathematics and Computer Science

Undergraduate computer science courses taught at John Jay College of Criminal Justice.

CSCI 271 Introduction to Computing and Programming Spring 2026

Introductory programming course focused on computational thinking, algorithmic problem solving, control structures, functions, arrays, and core programming foundations using C++.

  • C++
  • Programming Fundamentals
  • Algorithms
  • Problem Solving
CSCI 272 Object-Oriented Programming in C++ Fall 2026, Spring 2026, Fall 2025

Object-oriented programming course covering class design, encapsulation, constructors, composition, operator overloading, inheritance, polymorphism, file handling, debugging, and multi-file program structure.

  • C++
  • OOP
  • Debugging
  • Software Design
  • Git/GitHub
CSCI 362 Databases and Data Mining Fall 2026

Course covering relational database concepts, SQL, data preparation, data analysis, and introductory data mining workflows. The course connects database fundamentals with practical analytical thinking and responsible data use.

  • SQL
  • Databases
  • Data Mining
  • Data Analysis
CSCI 377 Computer Algorithms Fall 2026

Course in the design and analysis of algorithms, including asymptotic complexity, divide-and-conquer, sorting, search trees, graph traversal, shortest paths, greedy methods, and dynamic programming.

  • Algorithms
  • Complexity Analysis
  • Graph Algorithms
  • Dynamic Programming

St. John's University

Adjunct Assistant Professor, Division of Computer Science, Mathematics, and Science

Collins College of Professional Studies

Graduate courses taught at St. John's University as an Adjunct Assistant Professor.

DFR 711 Cyber Forensics & Malware Analysis Fall 2026

Graduate course in digital forensics and malware analysis, covering incident response, evidence acquisition, memory and storage analysis, reverse engineering, threat intelligence, and forensic reporting across Windows, macOS, and Linux.

  • Digital Forensics
  • Malware Analysis
  • Incident Response
  • Reverse Engineering
  • Mobile Forensics
  • Threat Hunting

Open Learning Resources

Free, step-by-step materials students can use before class and during practice. Explore source control, development setup, responsible AI study practices, and the MITRE ATT&CK framework. The full printable Git ebook lives in the Books section below.

Start Here

Git, GitHub & VS Code Source Control

Interactive beginner guide to version control, commits, GitHub publishing, branching, common fixes, and the visual Source Control workflow inside VS Code.

  • Git
  • GitHub
  • VS Code
  • Beginner
Open Interactive Guide
Windows Setup

C++ in VS Code on Windows

Step-by-step setup for compiling and debugging C++ using MinGW-w64, GCC, GDB, tasks, and launch configurations in Visual Studio Code.

  • C++
  • Windows
  • GCC
  • Debugging
Open Windows Guide
macOS Setup

C++ in VS Code on macOS

Step-by-step setup for compiling and debugging C++ using Clang, LLDB, build tasks, and launch configurations in Visual Studio Code on macOS.

  • C++
  • macOS
  • Clang
  • LLDB
Open macOS Guide
Study Practice

Responsible AI Prompting Guide

Classroom-oriented guidance for using AI to clarify C++ concepts, test understanding, and improve study workflows while maintaining academic integrity.

  • Responsible AI
  • Prompts
  • C++ Learning
  • Integrity
Open AI Study Guide
Interactive SQL Resource

SQL JOIN & Analytical Query Explorer

Step through join results, compare GROUP BY and HAVING summaries, and explore subqueries using fictional clubs and events. Includes a link to setup instructions, SQL scripts, and further reading.

  • SQL
  • Joins
  • Aggregation
  • Subqueries
Open SQL Explorer
Cybersecurity Guide

MITRE ATT&CK Interactive Field Guide

Learn to navigate ATT&CK from an adversary's goal to an evidence-backed technique. Follow a guided phishing case, find a second technique on MITRE's site, look up IDs, and check your understanding.

  • MITRE ATT&CK
  • Threat Analysis
  • Digital Forensics
  • Beginner
Open ATT&CK Guide

Free Tools for Students

Developer & AI Essentials

A curated list of free and discounted tools for students across development, AI, cloud, productivity, and design. Highlights include GitHub Education, JetBrains, Azure for Students, and other resources useful for building real technical projects.

Open Student Tools

Books

Long-form guides for general readers and students alike.

Kindle Edition

Cybersecurity Fundamentals: A Practical Guide for Everyone

A jargon-free guide to passwords, phishing, scams, identity theft, data backup, and consumer privacy rights — written for everyday internet users, not tech experts.

  • Cybersecurity Awareness
  • Online Safety
  • Consumer Protection
Learn More
Cover of Cybersecurity Fundamentals: A Practical Guide for Everyone, by Avijit Roy
Free ebook

Saving Your Work Like a Pro: Git & GitHub for C++ Students

A formal, 17-chapter ebook on Git and GitHub for C++ students, with practical workflows, recovery guidance, command reference material, and a print-ready PDF layout.

  • Git
  • GitHub
  • C++
  • Printable Ebook
Read the Ebook
Cover of Saving Your Work Like a Pro: Git & GitHub for C++ Students, by Avijit Roy

Curriculum Development

Selected Topics in Computer Science

CSCI 380 - Agentic AI Systems

Developed curriculum concepts and instructional materials for an Agentic AI Systems offering under the selected-topics computer science format. The course concept introduces students to AI agents, LLM workflows, tool use, prompt engineering, retrieval-augmented systems, evaluation, and responsible AI deployment.

  • Agentic AI
  • LLM Workflows
  • Applied AI
  • Responsible AI
Open Educational Resources

CSCI 271 Instructional Materials

Created instructional materials for introductory programming with an emphasis on accessibility, practical examples, modern C++ foundations, Git/GitHub workflows, and student-centered explanations that reduce the gap between lecture concepts and working code.

  • OER
  • C++
  • Git
  • Student Support

Teaching Interests

Areas I am prepared to teach or develop at the undergraduate or graduate level, depending on departmental need.

Programming & Software Design

C++, Python, Java,object-oriented programming, data structures, debugging, software engineering, Git/GitHub workflows, and secure coding practices.

Data Systems & Analytics

Database systems, SQL, data mining, data analysis, dashboard development, data quality, and practical analytics workflows using tools such as Tableau, Power BI, Python, and SQL.

Artificial Intelligence

Graduate-level Python, applied AI, machine learning foundations, NLP, transformer-based systems, LLM-assisted workflows, AI evaluation, and responsible AI deployment.

Cybersecurity & Digital Forensics

Cybersecurity fundamentals, digital forensics, secure software design, authentication, access control, evidence handling, privacy-aware systems, and applied security tooling.

Mentoring & Student Development

I mentor students through practical computing projects with clear technical goals, reproducible workflows, and outcomes they can explain, demonstrate, and continue improving after the course or research period ends.

Django Secure Single-Session Auth System

A production-oriented authentication system built with Django, enforcing one active session per user, tracking login activity, and supporting suspicious-access awareness. The project emphasizes secure session handling, schema design, reproducible development, and deployment-ready documentation.

  • Security
  • Authentication
  • Django
  • Python
  • PostgreSQL

Object-Oriented Programming Hackathon & CTF

Organized and led a student-centered programming event focused on object-oriented reasoning, debugging, problem solving, and applied computing challenges. The event encouraged students to work collaboratively while translating course concepts into timed, hands-on technical tasks.

  • OOP
  • CTF
  • Debugging
  • Student Engagement