OsGa.dev

#CTF Player #Development #PenTest #TechCommunities

Hi, I'm OsGa — passionate and experienced in web/system development, service operations, and cybersecurity. Active in CTF competitions and tech communities.

  • Email [email protected]
  • Bio
    • National Yunlin University of Science and Technology - IM(AI)
    • YunHack 1st - Leader
    • YunNET 26th Member / 27th System leader

Work Experience

Network Management Assistant

Department of Information Management, NYUST

2026 - Present

Network Development Assistant

Counseling Center, NYUST

2025 - Present

Network Development Assistant

Department of Industrial Management, NYUST

2025 - Present

System Team Lead

Network Management Team, NYUST

2025 - Present

Teaching Assistant

Programming Concepts and Methods, NYUST

2025 - 2026

Graduate Trainee

AAASec 2025 Cybersecurity Talent Training Program

2025 - 2026

Red Team Operator

Executive Yuan Cyber Attack and Defense Exercise

2025 - 2026

Cybersecurity Assistant

Office of Library and Information Services, NYUST

2024 - 2025

Projects

osga.dev

Personal website showcasing competition achievements and sharing project experiences.

Cover image for the osga.dev project

A personal site built with Astro, focused on fast loading, bilingual content management, and a maintainable section-based structure for presenting work and identity.

// Stack

  • Astro
  • TypeScript
  • CSS

// Highlights

  • Bilingual content support
  • Centralized i18n-driven content
  • Component-based section architecture

SITCON 2026

Official website, venue game, CFP, and CFS for SITCON 2026.

SITCON 2026 project cover

Contributed to the development of SITCON 2026’s websites and event systems, including the official website, venue game, call for proposals, and call for sponsorship. The project uses multiple repositories to maintain separate sub-sites and features, supporting event information, proposal submission, sponsorship information, and on-site interactive experiences.

// Stack

  • Astro
  • Next.js
  • Go
  • Three.js

// Highlights

  • Enhanced browsing experience and event engagement through interactive design
  • Designed venue-based missions to encourage interaction among attendees, booths, and participants
  • Turned sponsorship materials into a distinctive web experience beyond a traditional PDF

NYUST ICS

A timetable conversion tool for NYUST students that converts course schedule files into ICS calendar files.

NYUST ICS project cover

A timetable conversion tool designed for National Yunlin University of Science and Technology students. It parses DOCX course schedule files and converts them into ICS format, making it easy to import schedules into calendar apps. It supports course information parsing, consecutive class merging, timetable preview, and browser-side processing, reducing the effort required to manually create calendar events.

// Stack

  • Next.js
  • React
  • TypeScript
  • Tailwind CSS

// Highlights

  • Converts DOCX course schedules into ICS calendar files
  • Automatically parses course times, locations, and names, then merges consecutive class periods
  • Runs entirely in the browser, allowing quick use without registration

QuickJump

A command-line folder jumping tool that improves terminal workflow efficiency with custom hotkeys.

QuickJump is a Bash / Zsh command-line tool that lets users create custom hotkeys for frequently used folders, making it faster to switch directories and reducing repetitive cd commands. It supports autocompletion, JSON-based configuration, and installation scripts for a smoother development workflow.

// Stack

  • Shell
  • Bash
  • Zsh
  • jq

// Highlights

  • Quickly jump to frequently used folders with custom hotkeys
  • Supports Bash / Zsh integration and autocompletion
  • Manages paths through a JSON configuration file

Certifications

Cisco Certified Support Technician Cybersecurity

Cisco

Certificate ID: SxvH-u8w8

April 13, 2024

Information Technology Specialist: Cybersecurity

Information Technician Specialist

Certificate ID: wmdx5-48Go

April 13, 2024

Competitions / Activities

CTF

56屆 全國技能競賽 網路安全分區賽 / 中區佳作

2026

2025 HITCON CTF 精英交流賽 / Rank 6

(Team: Blue Goblin)

2025

CDX 資安攻防推廣交流賽 初賽第二 / 決賽佳作

2025

AIS3 EOF 進階資安攻防演練 / 最佳藍色小精靈獎

(Team: 希望這次可以進決賽><)

2025

AIS3 MyFirstCTF / 銀質獎

2024

PicoCTF / Rank 281/6957

(Team: B33F 50UP 4)

2024

T貓盃 全國資安基礎實務能力競賽 / 晉級(卡到檢定 QQ)

2023

53屆 全國技能競賽 網路安全分區賽 / 中區佳作

2023

Development

ITSA 生成式 AI 應用網頁設計競賽 第三名

2026

ITSA 生成式 AI 應用網頁設計競賽 佳作

2025

Others

AIS3 HACKATHON 銅質獎

(Team: Amazing 詐!)

2025

2025 第30屆大專校院資訊應用服務創新競賽 [台灣大AI紅隊 eKYC滲透創新組(TWM-AI Red Team)]

(Team: Oh Yeah 百變怪,就決定是你了!)

2025

52屆 全國技能競賽 資訊網路布建全國賽 / 全國第四

2022

52屆 全國技能競賽 資訊網路布建分區賽 / 南區金牌

2022

Presentations

Conferences

2025-11-09

MOPCON 2025

Lightning Talk - 身為一個資訊社群服務當然要自己做吧!關於我轉生到 SITCON 2026 開發組這檔事

Lightning Talk - 關於在充滿賽棍的環境舉辦 CTF 比賽

Security

2026-01-21

新竹女中資訊研究社

資訊安全介紹

2025-10-26

2025 南十校聯合迎新

資訊安全經驗分享

2025-09-25 - 2026-01-08

嘉義高中 資訊研究社 117 屆

資訊安全實務

2025-08-09

當個電神 聯合資訊體驗營

資安入門

2025-04-02

南大附中 資訊研究社

網路安全介紹

2025-02-27 - 2025-03-06

臺南二中 資訊研究社

網路安全介紹、網頁安全實作

2024-11-15

師大附中 網管小組

網頁安全基礎

2024-10-27

2024 南七校聯合迎新

資訊安全經驗分享

2024-09-25 - 2025-01-08

嘉義高中 資訊研究社 115 屆

資訊安全實務

2024-08-26

教育部資安人才培育計畫 夏日資安工作坊

資訊安全實務

2024-08-10 - 2024-08-11

JNIC 聯合資訊體驗營

資訊安全實務

2024-06-21

正修科技大學 資訊工程系

資安網路攻防競賽體驗

2024-06-08

教育部資安人才培育計畫 一日資訊體驗營

資訊安全實務(台中場)

2024-06-02

台南二中 資訊研究社

資安與資訊社群經驗分享

2024-06-01

教育部資安人才培育計畫 一日資訊體驗營

資訊安全實務(台北場)

2024-05-30

新莊高中 電腦研習社

Linux 基礎

2024-01-24 - 2024-01-26

知資為資知 - 2024 中部電資聯合寒訓

資安實務

2023-12-15 - 2024-01-05

海青工商 資訊科

資訊安全入門選修課程

Development

2026-02-05 - 2026-02-08

SCIST x SCAICT 2026 聯合寒訓 - 閃電四連編

開發講師

2025-05-17 - 2025-05-24

SCINT 基礎能力課程

Linux 設定、套件使用

2025-01-24 - 2025-01-26

【資深玩家】SCIST 2025 聯合寒訓

透過 Discord Bot 學習應用開發實務,經驗分享

2024-06-09

南四校資訊社聯合社課

Discord Bot 開發

2024-05-26

教育部資安人才培育計畫 一日資訊體驗營

程式設計實務(台南場)

2024-05-01

南大附中 資訊研究社

社群經驗與發展

2024-02-18 - 2024-02-25

SCAICT 二月主題課程

Discord Bot 開發 從入門到放棄

2023-09-21

新莊高中 電腦研習社

Discord Bot 開發

Community & Conferences

TWNOG 7

Infra Team

2026

SITCON

Deputy Lead, Development Team

2026

MOPCON

Development Team Member

2025

AIS3 Juniors 2025

Teaching Assistant

2025

HITCON

Program Team Member

2025

SITCON Camp

Mentor Team Lead

2025

SITCON

Program Team Member

2025

SCIST Midseason CTF

Problem Setter

2025

THJCC 2024 Winter

Problem Setter

2024

SCIST (S5)

Cybersecurity Teaching Assistant

2024

AIS3 Juniors 2024

Teaching Assistant

2024

AIS3 2024

Group A Participant

2024

Zeroday Cookie Club

Advisor

2024

1st THJCC

Founder / Problem Setter

2024

SCAICT

Information Team

2024