The engineer
Nearly three decades running critical infrastructure — power, cooling, networks, servers, storage and the discipline of never going dark. The professional work runs through XOR Bit Infotech.
Visit XOR Bit InfotechData center leader · Mentor · Occasional poet · Serial pun offender
Serious about systems. Unserious about most other things.
I am Harcharan Singh. I have spent nearly three decades keeping data centers awake, a good part of it teaching engineers from small towns how to get in, and the rest writing verses and inflicting puns on people who did not ask for them.
“Talent har jagah hota hai. Chance sirf kuch logon ko milta hai. Mera kaam hai — chance banana.”
Harcharan Singh
Recognised among the “Magnificent CIOs of India”. Founder of XOR Bit Infotech. Mentor at One Great Mentor.
27+ yrs
Inside IT & data center operations
10,000+
Students I have mentored
9
Mastery tracks I helped design
∞
Bad puns, delivered with confidence
Many sides, one person
Pick the version of me you came for
Some people arrive for uptime and architecture. Some arrive for career advice. Some arrive because someone forwarded them a joke. All of you are welcome — every door below leads somewhere real.
The mentor
I teach through One Great Mentor — nine mastery tracks built so a small-town engineer can walk into industry without apology.
Learn with meThe friend
A short list of people who showed up on the days that were hard to show up for. This page exists to thank them properly.
Meet themThe writer
Verses in Hindi, Punjabi and English — written on night shifts, in airports, and after conversations that stayed with me.
Read the poemsThe PJ King
A title my college friends gave me and I never appealed against. The puns are bad, the delivery is confident, and the groan is the applause I was going for.
Brace yourselfThe traveller
Trips, streets, mountains and food I could not stop photographing. The albums live right here.
See the albumsWhere the professional half lives
Two doors, both open
I keep this site personal. If you came for teaching or for technology work, these are the places that hold it properly.
Learn with me
One deep mastery, a stack of adjacent skills, and the mindset to keep both alive for a whole career. Nine mastery tracks, taught on One Great Mentor — built for engineers from Tier 2 and Tier 3 India.
Go to One Great MentorWork with me
Advisory, operations and capability building run through XOR Bit Infotech, with Yorbit Infotech for smart infrastructure and IoT.