Course Information

  • Sessions 1 day
  • Duration 7.5 hrs
  • Level Beginner
  • Assessment NA

Venue

12 Woodlands Square #07-85/86/87 Woods Square Tower 1, Singapore 737715. 5 mins walk from Woodlands (NS9) MRT station.

The venue is disabled-friendly.

Course Brochure

Certification

  • Certificate of Achievement from Tertiary Infotech Academy Pte Ltd - Upon meeting at least 75% attendance and passing the assessment(s), participants will receive a Certificate of Achievement from Tertiary Infotech Academy Pte Ltd.

Codex Masterclass

Course Code: C989
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What's This Course About

Codex Masterclass teaches you how to master Codex, the agentic coding surface in the ChatGPT desktop app that plans, writes, runs and checks code inside your project while you review and guide the work. Instead of coding every step yourself, you describe the goal, approve the plan and evaluate the result against evidence. The masterclass is designed for developers, technical professionals, analysts and product builders who want to use an AI coding agent to build and govern real applications.

You will start with the fundamentals of Chat, Work and Codex in the ChatGPT app, then work as the AI-assisted developer behind a fictitious cooking school, taking one business from a written brief to a live website. Codex plans the site with /plan, builds it from the course catalogue, adds durable rules in AGENTS.md and a sign-up form for every course, and publishes it to GitHub Pages. Next you will explore tools and build a SQLite RAG assistant, turning course brochures into a knowledge base, driving it to 30 out of 30 golden questions with /goal, red-teaming it and testing the site with Computer Use.

The final topic covers skills and hooks, the features that make an agent dependable, including community skills from skills.sh, custom skills created with the skill creator, a timed workshop popup and a hook that re-checks the site after every edit. Throughout the masterclass you will practise planning before editing, permission control, keeping secrets out of static sites and human review. By the end, you will be able to use Codex confidently to build, test and govern real applications.

Funding Options

No funding is available for this course

For WSQ funding, please checkout the details at WSQ - Agentic AI Applications with Codex

Course Fee

$350.00 (GST-exclusive)
$381.50 (GST-inclusive)

Course Date

* Required Fields

Additional Note

Please bring your own laptop for hands-on training. If you don't have laptop, we can provide spare laptop for training use.

Post-Course Support

  • We provide free consultation related to the subject matter after the course.
  • Please email your queries to enquiry@tertiaryinfotech.com and we will forward your queries to the subject matter experts.

Cancellation & Reschedule Policy

  • You can register your interest without upfront payment. There is no penalty for withdrawal of the course before the class commences.
  • We reserve the right to cancel or re-schedule the course due to unforeseen circumstances. If the course is cancelled, we will refund 100% for any paid amount.
  • Note the venue of the training is subject to changes due to availability of the classroom.

Course Details

Course Details

What You'll Learn

Topic 1: Fundamentals: Chat, Work and Codex

Topic 2: Tools and the SQLite RAG Assistant

Topic 3: Skills and Hooks

Course Info

Minimum Entry Requirement

Knowledge and Skills

  • Able to operate using computer functions
  • Minimum 3 GCE ‘O’ Levels Passes including English or WPL Level 5 (Average of Reading, Listening, Speaking & Writing Scores)

Attitude

  • Positive Learning Attitude
  • Enthusiastic Learner

Experience

  • Minimum of 1 year of working experience.

Target Age Group: 21-65 years old

Minimum Software/Hardware Requirement

Software:

You will need the following for this course:

Hardware: Windows PC or Mac laptop

Job Roles

Job Roles

  • Digital Marketing Specialist
  • Social Media Manager
  • Online Brand Manager
  • Content Creator
  • Digital Content Specialist
  • Advertising Manager
  • Marketing Analyst
  • E-commerce Specialist
  • Media Planner
  • SEO Specialist
  • Product Manager
  • Community Manager
  • Public Relations Specialist
  • Influencer Marketing Specialist
  • Affiliate Marketing Manager

Trainers

Trainers

Mohan Pothula is an experienced network engineer and IT infrastructure specialist with more than 18 years of expertise in system administration, network security, and cloud integration. He has managed enterprise network solutions for multinational corporations and trained IT professionals in CompTIA certifications, Cisco networking, and cybersecurity. Mohan’s technical mastery spans routing and switching, WAN optimization, and network troubleshooting, making him a trusted mentor for learners preparing for globally recognized IT credentials.
In “CompTIA Certified Network+ Training (Synchronous e-Learning),” Mohan focuses on providing a strong foundation in networking concepts, infrastructure, and security. His sessions combine theoretical instruction with real-world lab simulations using tools such as Cisco Packet Tracer and Wireshark. With his methodical teaching style and hands-on guidance, he helps learners develop the competencies needed to design, configure, and maintain reliable and secure network systems.

Truman Ng is a senior IT consultant and network systems architect with over 20 years of experience in enterprise infrastructure, cybersecurity, and automation. A PMP, ACTA, and Huawei HCIE-certified professional, he has led global projects across industries focusing on network optimization, cloud deployment, and digital transformation. His expertise lies in integrating secure networking solutions with modern IT systems, ensuring scalability and performance in dynamic enterprise environments.
In “CompTIA Certified Network+ Training (Synchronous e-Learning),” Truman equips learners with the technical skills required to design and manage enterprise networks. His sessions emphasize network architecture, troubleshooting, and security best practices aligned with CompTIA standards. Through hands-on simulations and real-world case studies, he enables participants to build confidence in managing complex network infrastructures and preparing for industry certification.

Agus Salim is an experienced IT solutions and cybersecurity professional with a strong foundation in cloud infrastructure and project management. With over a decade of experience in systems integration, software development, and IT security across both enterprise and consulting environments, he brings a practical understanding of secure system design and deployment. His credentials include PMP, CompTIA Security+, CEH, and AWS Certified Cloud Practitioner, reflecting his balanced expertise in governance, risk management, and cloud operations. Agus has worked with leading organizations such as Citi and Check Point Software Technologies, providing hands-on technical and security support across multi-cloud platforms.
Alec Tan is an IT trainer and systems engineer with over 20 years of experience spanning IT technical support, system integration, and IT training. He holds multiple CompTIA certifications, including A+, Network+, and Server+, and is also WSQ ACLP-certified, equipping him with both the technical expertise and the pedagogical skills to deliver effective training. His professional career includes roles as a Network Systems Engineer at McKinn International and freelance IT trainer at Nexus Academy, where he taught Office 365, Big Data, Artificial Intelligence, and CompTIA certification programs. With strong technical competencies in Microsoft Windows Server, desktop and laptop support, and IT infrastructure management, Alec brings a wealth of hands-on experience to Security+ training. His teaching emphasizes practical learning, covering key Security+ domains such as threat management, identity access, cryptography, and risk mitigation. By combining deep technical knowledge with a learner-focused approach, Alec ensures participants are well-prepared to achieve Security+ certification and apply cybersecurity principles in real-world IT environments.

Dr. Alfred Ang is a distinguished technology leader, educator, and cybersecurity expert with over 20 years of experience in IT systems, cloud computing, and digital transformation. As Chief Technology Officer and CIO of Tertiary Infotech Pte Ltd, he has spearheaded the development of over 500 WSQ-accredited technology programs. Dr. Ang holds a Ph.D. in Information Systems and multiple industry certifications including CompTIA Security+, CISSP, and CEH, reflecting his deep expertise in both academic and enterprise IT domains.
In “CompTIA Certified Network+ Training (Synchronous e-Learning),” Dr. Ang provides strategic insights into modern network architectures, security implementation, and enterprise infrastructure design. His sessions integrate foundational networking principles with cybersecurity considerations, preparing learners for both certification success and real-world deployment. Through his engaging and comprehensive instruction, he empowers participants to master network management and contribute effectively to organizational IT operations.

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