Rubhak A

Founder & CEO

Cyber Security Specialist

Ethical Hacker

Penetration Tester

Web Developer

Entrepreneur

Rubhak A

Founder & CEO

Cyber Security Specialist

Ethical Hacker

Penetration Tester

Web Developer

Entrepreneur

About Me

Hello! I’m Rubhak A.

A cybersecurity enthusiast. The founder & CEO of Green Dwarf Tech. Passionate about penetration testing, web development, software development and contribution to open-source tools.

My Services
Web Development

I create fast, secure, and mobile-friendly websites tailored for businesses and e-commerce, using modern tech to ensure performance and reliability.

Web Hosting Solutions

I offer reliable, secure hosting with performance optimization, SSL, backups, and uptime monitoring—perfect for businesses that value speed and security.

Penetration Testing & Vulnerability Assesment

I identify and fix security flaws through in-depth vulnerability assessments and ethical hacking—helping businesses stay protected against real-world threats.

Custom Web App Deployment & Automation

I deploy and automate web applications tailored to your needs, ensuring smooth, scalable, and efficient operations with minimal manual effort.

Clients
Testimonials
Fun Facts
650+ Albumes Listened
24 Certificates Earned
10,000+ Cups Of Coffee
50+ Projects Completed
Resume
Experience
Founder & CEO
Aug 2023 - Present
Founder & CEO
Green Dwarf Tech

Founded Green Dwarf Tech to deliver secure tech solutions and services. Leading all management works, web developement, and cyber security. Focused on performance, privacy, and reliability for businesses.

CISO
Dec 2025 - Present
CISO
Green Dwarf Tech

CISO at Green Dwarf Tech, leading cybersecurity across web development and infrastructure with privacy-by-design and zero-trust principles. Oversee risk management, threat modelling, compliance, server deployments, and penetration testing for reliable business systems.

Web Developer & Cyber Security Analyst
Jan 2020 - Aug 2023
Web Developer & Cyber Security Analyst
Freelancer

Provided web development and ethical hacking services for clients across industries. Delivered static and dynamic websites, conducted security audits, and helped businesses strengthen their digital footprint.

Education
B.Tech CSE (SPE)
2025 - Present
B.Tech CSE (SPE)
Kalvium x Kalasalingam University

Pursuing a B.Tech in CSE with a specialization in Software Product Engineering through Kalvium’s industry-integrated program. Gaining hands-on experience in full-stack development, real-world problem solving, and agile product building from day one.

Certificate
12th Standard
2024 - 2025
12th Standard
CBSE - Maths/CS

Completed Class 12 with a focus on Computer Science, building a strong foundation in analytical and technical skills.

Certificate
10th Standard
2022 - 2023
10th Standard
CBSE

Completed Class 10 with distinction, developing core knowledge across mathematics, science, and technology.

Certificate
Skills
Overall
  • Entrepreneurship
  • Penetration Testing
  • Software Development
  • Web Development
Languages
  • Tamil
    100%
  • English
    90%
Checklist
  • Cybersecurity Tools
    90%
  • Full Stack Web Development
    80%
  • Wordpress
    85%
  • Critical thinking
    75%
Knowledge
  • Fullstack Frameworks
  • Web Servers
  • Web Hosting
  • DNS Management
  • Containerization, Virtualisation
  • Linux Systems
  • Windows Systems
  • Adaptability
Certs
1. Ongoing Certifications
Microsoft Cybersecurity Analyst
Present - Working On
Microsoft Cybersecurity Analyst
Microsoft (Coursera)

Gained foundational skills in Microsoft Azure security, threat protection, encryption, compliance, and Microsoft Defender/Sentinel for incident response.
Progressing through hands-on labs in penetration testing, vulnerability management, and SC-900 exam prep to strengthen cloud security operations (ongoing).

Certificate
2. Main Certifications
IBM Cybersecurity Analyst Professional
Oct 13, 2025
IBM Cybersecurity Analyst Professional
IBM (Coursera)

Learnt an in-depth program covering key cybersecurity domains including threat intelligence, network security, incident response, and SIEM tools. Gained hands-on experience with IBM QRadar, Linux, and key frameworks like NIST and MITRE ATTACK.

Certificate
Google Cybersecurity Professional
Jul 27, 2025
Google Cybersecurity Professional
Google (Coursera)

Completed a comprehensive program covering security operations, network security, system hardening, incident response, and SIEM tools. Developed hands-on skills using Linux, Python, and security frameworks aligned with industry best practices.

Certificate
3. Sub Certifications
Linux and Private Cloud Administration on IBM Power Systems
Oct 2, 2025
Linux and Private Cloud Administration on IBM Power Systems
Redhat x IBM

Mastered Red Hat Enterprise Linux administration on IBM Power Systems, including LPAR partitioning, PowerVM virtualization, OpenShift deployment, and IBM PowerVC private cloud orchestration. Applied hands-on skills in command-line operations, storage/networking configuration, performance tuning, and secure enterprise infrastructure management.

Certificate
Real NMAP : Elite Network Scanning & Recon (CNMP+)
July 16, 2024
Real NMAP : Elite Network Scanning & Recon (CNMP+)
Udemy

Mastered advanced Nmap techniques for network scanning, reconnaissance, and enumeration. Gained in-depth knowledge of scanning types, firewall evasion, OS detection, and real-world recon strategies used in penetration testing.

Certificate
Exposure Management Certification
May 09, 2024
Exposure Management Certification
XM Cyber

Certified in identifying, prioritizing, and managing security exposures across hybrid environments. Gained practical skills in continuous threat exposure management (CTEM), attack path analysis, and proactive risk mitigation.

Certificate
Commonwealth Bank - Cybersecurity Job Simulation
April 18, 2024
Commonwealth Bank - Cybersecurity Job Simulation
Forage

Gained practical experience in securing digital banking systems, responding to cyber incidents, and managing customer data privacy. Focused on tasks like phishing analysis, risk mitigation, and internal policy review within a financial services environment.

Certificate
Tata Group - Cybersecurity Analyst Job Simulation
April 15, 2024
Tata Group - Cybersecurity Analyst Job Simulation
Forage

Participated in simulations focused on securing IT infrastructure and handling cyber incidents. Tasks included analyzing potential threats, drafting security policies, and implementing preventive strategies in a corporate environment.

Certificate
PwC - Cybersecurity Job Simulation
April 15, 2024
PwC - Cybersecurity Job Simulation
Forage

Completed tasks simulating client-facing cybersecurity consulting, including risk identification, vulnerability assessment, and reporting. Gained insights into how PwC helps organizations manage and respond to evolving cyber threats.

Certificate
Datacom - Cybersecurity Job Simulation
April 15, 2024
Datacom - Cybersecurity Job Simulation
Forage

Worked on practical scenarios involving threat detection, incident response, and vulnerability assessment. Gained exposure to how Datacom approaches cybersecurity challenges for enterprise clients across various sectors.

Certificate
ANZ - Cybersecurity Management Job Simulation
April 15, 2024
ANZ - Cybersecurity Management Job Simulation
Forage

Engaged in real-world simulations focused on securing banking systems and protecting customer data. Tasks included assessing phishing threats, analyzing security breaches, and applying risk mitigation strategies in a financial services context.

Certificate
AIG - Cybersecurity Job Simulation
April 15, 2024
AIG - Cybersecurity Job Simulation
Forage

Completed real-world cybersecurity tasks including threat modeling, policy development, and risk analysis. Gained insight into how AIG protects sensitive financial data and manages security operations within a global insurance framework.

Certificate
Mastercard - Cybersecurity Job Simulation
April 12, 2024
Mastercard - Cybersecurity Job Simulation
Forage

Gained hands-on experience in identifying and analyzing cybersecurity threats within a global payment network. Tasks included monitoring network activity, conducting risk assessments, and developing incident response strategies. Learned how Mastercard ensures data protection and system resilience in high-scale environments.

Certificate
Linux Bash Scripting
Mar 22, 2024
Linux Bash Scripting
Udemy

Developed hands-on skills in writing and automating shell scripts for Linux environments. Covered topics like variables, loops, conditionals, functions, and task automation essential for system administration and DevOps workflows.

Certificate
Mastering Windows Security
Feb 18, 2024
Mastering Windows Security
Udemy

Learned advanced techniques for securing Windows environments, including user access control, system hardening, auditing, and threat detection. Focused on real-world practices for securing endpoints and enterprise Windows infrastructures.

Certificate
Digital Skills - Digital Marketing
Mar 30, 2020
Digital Skills - Digital Marketing
Accenture (Futurelearn)

Gained foundational knowledge in digital marketing strategies, including SEO, SEM, social media, email marketing, and analytics. Explored how digital tools are used to reach and engage target audiences effectively.

Certificate
Digital Skills - Artificial Intelligence
Dec 27, 2019
Digital Skills - Artificial Intelligence
Accenture (Futurelearn)

Learned the fundamentals of AI, including machine learning, neural networks, and data-driven decision making. Developed an understanding of how AI is transforming industries and how to apply ethical AI solutions in business contexts.

Certificate
Blog
February 9, 2026 Why Small Businesses Are Prime Targets for Cyberattacks (And Simple Fixes You Can Start Today)

Who this is for: Owners of local shops, consultancies, or e-com sites who think “I’m too small to hack.”What you’ll…

January 30, 2026 Checklist I Use Before Launching Any Client Website (Dev to Production)

Who this is for: Small business owners, freelancers, or agencies who want zero surprises on launch day.What you’ll learn: My…

July 21, 2025 5 Common Security Flaws in Modern Websites (and How to Fix Them)

In today’s digital-first world, even small vulnerabilities in a website can be exploited to devastating effect. Whether you’re a startup…

July 11, 2025 Why Every Business Needs Penetration Testing – Not Just Big Tech

Most businesses assume they aren’t targets for cyberattacks. That assumption is wrong. In reality, small and mid-sized businesses are increasingly…

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