ABOUT
Think clearly, Build daily
- Five years in investment banking and venture capital
- Artillery forward observer
- Teaching Korean and how to think since 2018
- A podcast and newsletter every week
- Based in Seoul
I coach and teach people in Korea and abroad, and I'm building my own business around it. At home that runs from office workers to C-level executives and high-net-worth individuals, which follows from the IB and VC years.
Teaching Korean came first, and from there a lot of things connected to Korean culture. My students include language teachers with twenty-five years in their own classrooms — English, French, Spanish — and I run Maru, a community of about a hundred people from fifty countries.
For executives abroad I teach business Korean, and when politicians and business people visit Korea, I meet them and show them the country.
Along the way I run social accounts in Korean and in English, about twenty thousand followers in total. Educator and coach, podcaster, marketer, private investor, writer — several identities at once. Two reels have between them passed a million likes.
Before this I was a humanities student who liked debate, presenting and writing, and I finished university the hard way. Then military service as an artillery forward observer operating the TAS-1K, four years as an investment banker at a securities firm in Yeouido, and a year reviewing deals at a venture capital firm in Apgujeong. I was an institutional investor once; now I invest on my own account.
I tend to treat life as something to explore, so I keep taking new routes — and I take notes as I walk, out loud. Lately I've been keeping a record of my own life the way one keeps a chronicle, laid out in order.
Which means perspectives and small findings turn up that seem a waste to keep to myself. So alongside the membership, I write a newsletter of everyday thinking. Anyone can sign up. It's a record for my own sake as much as anything, but reading it may be worth something to you too. I write when there's time, without a schedule.
It's free.

Eight chapters
8 chapters. From a desk in a small town to here.
01~2012Childhood
01~2012Childhood
- 022013.03 – 2015.02
Silence, and a year off
At twenty, on Christmas, I stopped studying and took a vow of silence.

022013.03 – 2015.02Silence, and a year off
At twenty, on Christmas, I stopped studying and took a vow of silence.
032015.03 – 2018.02Back to study
Alongside it: a startup club, fitting modelling, and everything else I could get into.
032015.03 – 2018.02Back to study
Alongside it: a startup club, fitting modelling, and everything else I could get into.
- 042016.03 – 2020.06
ROTC and artillery officer
Officer training opened a long road, and a great deal of learning.

042016.03 – 2020.06ROTC and artillery officer
Officer training opened a long road, and a great deal of learning.
052020.08 – 2024.08Investment Banker
Corporate finance — bonds, IPOs, rights offerings, mezzanine
052020.08 – 2024.08Investment Banker
Corporate finance — bonds, IPOs, rights offerings, mezzanine
- 062024.09 – 2025.09
Venture Capitalist
Investment review at a new-technology finance company

062024.09 – 2025.09Venture Capitalist
Investment review at a new-technology finance company
072025.10 – 2025.12Reinstalling the software
Three months, deliberately left empty.
072025.10 – 2025.12Reinstalling the software
Three months, deliberately left empty.
- 082026.01 –
Solopreneur
(Worker → Investor → Builder)

082026.01 –Solopreneur
(Worker → Investor → Builder)
If there is anything you would like to ask.