15+ years running performance media across 25 markets and 60+ brands. Practitioner first. Now teaching what actually works, from agentic AI to answer-engine visibility.
He tests strategy in the field, then teaches what works. Fifteen years of running media for global brands, turned into classrooms across 21 countries.
YS Koh (Koh Yoet Siang) is a Singapore-based AI & digital marketing instructor, consultant and founder of Republic Asia. He has spent 15+ years driving commercial growth for 60+ brands, from global names to SMEs, across 25 markets on four continents, with P&L ownership of S$50M+ in regional marketing and growth operations.
He has trained more than 5,200 learners in 21 countries, teaching agentic AI, digital marketing and e-commerce as adjunct faculty since 2017 and as an appointed consultant and curriculum developer to the United Nations ICT Institute (APCICT). He holds an MBA from the National University of Singapore and is a Certified AI Governance Professional.
Most recently he was Head of Search & Social at Omnicom (IPG Mediabrands) and was named Employee of the Year in 2023.
Across 25 markets on four continents, reporting straight to CMOs, regional marketing directors and business owners.
In 21 countries, through universities, CET centres and UN programmes.
Average on e-commerce campaigns
Global names and SMEs
Per market, from zero, in 12 months
Field work keeps the teaching current. Teaching forces the frameworks to be clear. Consulting proves both. Coaching keeps the delivery sharp.
Media planning and buying across search, social, programmatic and OOH. Led the Search & Social craft at Omnicom (IPG Mediabrands) and owned biddable P&L for the world's #1 sustainable automotive brand.
Adjunct global senior lecturer and curriculum developer since 2017. Teaches agentic AI, automation stacks, RAG, vibe coding, digital marketing and e-commerce through universities, CET centres and UN programmes.
Founded Republic Asia in 2017, accredited by the Singapore Accreditation Council. Builds lead generation systems, automated workflows and agentic AI engines for SMEs, Fortune 500 clients and government agencies.
Certified fitness instructor (Les Mills IMT, ACE PT, NSCA CSCS). The same craft as the classroom: read the room, hold the energy, coach people past what they thought they could do.
Automotive, luxury, FMCG, financial services, pharmaceutical, travel, streaming and public sector.
Agentic AI, AI governance, digital marketing and e-commerce courses, delivered in Singapore and across Asia-Pacific through training organisations, universities and UN programmes. Several are WSQ-accredited.
Multi-agent frameworks · automation stacks
Workflow design and orchestration
Vibe coding · RAG · context management
Multimodal AI for daily work
WSQ-accredited · AIGP grounded
Includes dropshipping models · WSQ
Account build to optimisation · WSQ
Targeting, creative, measurement · WSQ
Marketing dashboards and reporting
Diploma in Digital Marketing module
Automated content creation · diploma module
MSME and educator capacity building
Responsible AI · data protection
Curricula are built to order for teams, from a two-hour workshop to a multi-week track. Start a conversation →
The organisations he trains for, and the institutions that trained him.
Nine roles, current first. The year tracks the role in view.
YS Koh (Koh Yoet Siang) is a Singapore-based AI & digital marketing instructor, consultant and founder of Republic Asia. He has 15+ years of senior digital leadership across 60+ brands and 25 markets on four continents, has trained 5,200+ learners in 21 countries, holds an MBA from the National University of Singapore and is a Certified AI Governance Professional. He is an appointed consultant and curriculum developer to the United Nations ICT Institute (APCICT).
Four roles that reinforce each other. As a practitioner, he ran performance media as Head of Search & Social at Omnicom (IPG Mediabrands), owning P&L for the world's #1 sustainable automotive brand. As an educator, he has been adjunct global senior lecturer and curriculum developer since 2017 and ICT consultant to the UN Asian and Pacific Training Centre. As a founder, he runs Republic Asia, an SAC-accredited digital consultancy. He is also a certified fitness instructor (Les Mills IMT, ACE PT, NSCA CSCS).
Building AI Agents for Work Automation, Agentic AI for Business Process Workflow Automation, AI-Assisted Deployment and Agent Automation, AI at Work: Prompt Engineering for Professionals, and AI Governance and Responsible AI. Topics span multi-agent frameworks, RAG, context management, multimodal AI, automation stacks and vibe coding. Several are WSQ-accredited, and he builds custom AI curricula for corporate clients.
Email ys@republicasia.co with your audience, topic, date, duration and location. He delivers in person across Asia-Pacific and online, from two-hour hands-on workshops to multi-week accredited programmes, and travels up to 75% of the time.
60+ B2B and consumer brands, from global names to SMEs across 25 markets and four continents, spanning automotive, luxury, spirits, FMCG, pharmaceutical, financial services, travel and hospitality, streaming, education and government. Engagements have included Accor, British Council, Carlsberg, Chanel, Citi, DBS, Deliveroo, Diageo, Dyson, ExxonMobil, Lego, Mentholatum, Merck, Nestle, New Balance, Philips, Prime Video, Sanofi, Sentosa, TUI, Vantage and Volvo.
P&L ownership of S$50M+ in regional marketing and growth operations and S$10M+ in annual media billing. 10X average ROAS on e-commerce campaigns, 10K+ monthly e-commerce transactions for a global education provider across 15 countries, brand social followership grown from zero to 1M+ per market in four countries within 12 months, and S$3M+ in monthly GMV with 7K+ high-ticket leads generated. Named Omnicom (IPG Mediabrands) Employee of the Year in 2023 and Top Performer for three consecutive years.
Nine-plus years as adjunct faculty, teaching 5,200+ learners across 21 countries through executive education, university business faculties, career-transition programmes and government-sponsored programmes. He designs curricula on agentic AI, automation stacks, RAG, vibe coding, Google Ads, Meta and TikTok ads, e-commerce, SEM and SEO. He is an accredited adult educator holding the WSQ Advanced Certificate in Learning and Performance from the Institute for Adult Learning, SUSS.
He is a Certified AI Governance Professional and teaches WSQ-accredited AI Governance and Responsible AI. He serves as ICT consultant to the United Nations Asian and Pacific Training Centre, advising on AI applications and digital capacity building for MSMEs and educators across Asia-Pacific. He also completed an Executive Certificate in Strategic Leadership with AI and ML at Singapore Management University.
Yes. YS Koh delivers corporate AI training in Singapore and across Asia-Pacific, in person or online. Programmes cover agentic AI, AI agents for work automation, prompt engineering, AI governance and responsible AI, and AI for marketing teams. Formats range from two-hour hands-on workshops to multi-week WSQ-accredited tracks, and curricula can be built to order for a team.
Republic Asia is the digital marketing, e-commerce and AI transformation consultancy YS Koh founded in Singapore in August 2017, accredited by the Singapore Accreditation Council. It implements lead generation systems, automated workflows and agentic AI engines for SMEs, and holds retainers and implementation projects with Fortune 500 companies, government agencies and SMEs.
An MBA from the National University of Singapore (2018), a Bachelor of Business Management from RMIT University (2013) and a Diploma in Electronics, Computer and Communications Engineering from Nanyang Polytechnic (2008). He is a Certified AI Governance Professional (SMU, 2026) and holds executive certificates in Strategic Leadership with AI and ML (SMU, 2026) and MarTech and AI (MICA, 2026). He is an accredited adult educator (WSQ ACLP, Institute for Adult Learning, SUSS) and a Singapore Certified Management Consultant (TUV SUD).
Yes, through Republic Asia. Typical engagements are digital transformation roadmaps, media and martech audits, AI adoption and governance programmes, agentic AI implementation, SEO/AEO/GEO visibility work, and commissioned research or whitepapers. Retained and project-based arrangements are both available. Email ys@republicasia.co with scope and timeline.
