Mrthdrb

While others are addressing the right point that it is not your problem, I think your original question is not addressed:

How do I tell him that I plan to leave although my co-worker left recently?

Tell him in a face-to-face discussion. Say something like this (with your own variation!)

Hey boss, something has changed on my personal front and I would have to seek career outside this company. I know colleague Joe left earlier this week and I am sorry if this would put your projects on an extremely tight schedule. I hope it works out well for all of us.

Then offer him how you can pitch-in to make transition smoother. While showing your concern for your current company is "not your problem" if you are leaving, it is a great gesture to ensure you leave on good terms.

Welcome to the Workplace.

It's not your problem or fault that someone else has left the company. If you made a decision and you are sure about that, you need to talk to your manager and say you'll leave.
15-10 days is a good time for them to know so they can organize things better. Also, see if your contract say something about how much time you have to give notice in order to quit.

I know the situation is not the best, and you may feel guilty, but this is normal, these things happens and a company must be prepared.

I hope you know the difference between "quitting", "leaving" and "giving notice".

If you are in the USA, you are expected to give two weeks notice, in the EU usually more.

So if you want to stop working at this place 15 days from now, you should go to your boss now and tell him "Sorry boss, but I want to leave, and my last day will be the 5th of April" (typing this March 20th). And then you give him the same in writing.

How do I tell my boss that I'm quitting in 15 days (a colleague left this week) ?

Say in English : Hi boss, I'm quitting in 15 days

Company doesn't care if you they think of firing you Or there is layoff. Its business my friend just to make money out of employees, dont get attached to it!

I would say exactly what top answers are stating here, until I actually entered into this situation myself.

To someone not in this situation it looks like a simple decision between our interest's vs company interests. However this gets complicated when one of following is true,

• You care about your future relationship with your manager, in case you want to come back to company, so don't want to burn any bridges.




• You care about company too e.g. if it's organization making world a better place e.g. police department or a hospital or so.

It's really easy to decide to go 100% in favour of your own interests if you don't care about company e.g. manager had been unfair to you, so giving them standard notice sounds like the best.

I think at end your own interests always wins because you don't know how your manager or company will respond to your (good and not so good news). By good news I meant you give them more then standard notice and not so good for which you are leaving after a period.

I think you could frame it in this way...

I love (choose correct word as how strong you feel) working at place
X with person1, person2 and maybe person3 or a group, however I was approched for postion Y by a recruitment agent or whatever the situation was, which I believe is in my
best interests. I wish I could had stayed more but I made a very
difficult decision to grap the opportunity I am getting, hence I will
be leaving on date ABC...

All of this depends on you and your morals. You are working for money, you have family to feed, you have bills to pay, you can't work for free just because there's a need for you in the company or because the boss is a nice person.

You are free to quit whenever you want and no one has the right to object as long as your contract allows it and you have secured another position (quitting before finding another job may easily backfire against you)

So, don't think too much about it, the company will sure try to recruit others to replace you, many people are looking for jobs, so instead of choosing one candidate, they'll simply choose two, I mean it's their company, they should know how to manage it and how to deal with situation like these even if everyone quit at the same time.

Wish you good luck

Be open about things. Tell them your plans and tell them your concerns. Try to work with them to provide the best solution for your current employer to continue their product and make sure you keep your own interest in mind. You already accepted that other job, which means you didn’t leave a lot of options open. Suggest you’re willing to help, to train someone to that will take over your job, and then make the move. No need to burn bridges. Treat other how you want to be treated if you where in their shoes.