Ask your supervisor if she can promote you to different position that has similar powers as supervisors, that way you don't have to work under that guy.
I Refuse to Work With the Manager Who Fired Me Years Ago

Workplace drama can turn into a real career crisis when a toxic boss returns, forcing tough choices about mental health, job security, and professional growth. From HR decisions to office politics, situations like this can make even a dream job feel unsafe. Today, a reader sent us a letter about facing her former manager again at work.
Josie’s letter:
Dear Bright Side,
Hi! My name is Josie, I am 31.
I was fired from my old job by my supervisor, Simon, after I refused to keep doing his work for him. He would dump tasks on me, disappear for endless coffee breaks, then take the credit at the end of the day.
After two weeks, I finally confronted him. He called me “lazy” and accused me of “avoiding responsibilities”. Since he was senior, he had the power, and he fired me.
I left and eventually found another company. I’ve been here for 3 years, and everything has been great. I’ve grown a lot, learned so much, and genuinely felt happy here.
Then I found out Simon left his old job, got hired at my current company, and is joining our team. Worse, he’s going to be my supervisor again.
When I heard the news, it felt like my worst nightmare coming back. I went straight to HR and said, “I’m not working with the guy who fired me unfairly. He’s unprofessional and avoids his duties.” She just smiled and didn’t say anything.
The next day, HR emailed everyone:
“Dear colleagues, please join us in welcoming Mr. Simon L. as your new supervisor. And to get him acquainted with our workflow and customs, our team member Josie will be assisting him and guiding him for the first two months.”
I read it twice, thinking it had to be a joke. It wasn’t. HR had decided I would be the one to “assist” Simon, because it would help us “move past the tension” and “start fresh”.
I smiled and nodded.
After lunch, everyone walked in and froze when they saw my desk empty. I told HR I was leaving. I can’t work in an environment where I’m expected to support the person who mistreated me and fired me.
Now I’m torn. Is leaving a mistake?
I’ve spent 3 good years here, and it feels unfair to lose a job I love because of one person. But I also can’t imagine working under him again.
What should I do?
Josie

Josie, thank you for trusting us with your story. Before you make your resignation final, pause and evaluate your next best move with a clear career strategy.
You deserve a safe workplace, real accountability, and a fresh start on your terms. This is our advice for you:
Create a “paper trail timeline” dossier.

Don't worry about it bro... you left and grew before. You can do it again. This time aim for higher so no one like that doofus will be over you ever again. Better yet open your own company.
Before you decide anything, write a clean, factual timeline of what happened last time with Simon: dates, tasks he dumped, credit he took, the confrontation, and the firing reason he used. Bring it to a private meeting with HR’s manager (not the same rep) and say: “I’m documenting a prior employment conflict with my incoming supervisor.”
Ask them to add it to your file and confirm in writing who handles escalation if retaliation repeats. This isn’t a “feelings talk”; it’s risk documentation that makes HR take you seriously.
Flip the onboarding: visible deliverables.

Trust your instinct. A tiger doesnt change it's stripes. The fact that your company paired you up shows how little they care. Use all your personal and sick days, all your vacation time, get a note from your doctor. And get out. All that malarkey of documents everything ...that's just double work to get to stay. You will always be watching your back..no dear, leave.
If they insist you “assist him,” turn it into a structured onboarding plan with public artifacts: a checklist, owners, and sign-offs that the whole team can see. Set it up so every task you do is logged as “Josie delivered X” and every decision is recorded as “Simon approved Y.”
That removes his favorite move (disappear + take credit) because the workflow itself becomes evidence. If he tries to slide work onto you, you can point to the checklist: “That’s assigned to the supervisor role.”
Pre-negotiate a two-month escape hatch.
Use HR’s “two months” wording against them: propose a written plan that after 30 days you either (a) move to a different reporting line,
or (b) transfer teams—no drama, just a scheduled checkpoint.
Frame it as: “I’ll support onboarding, but we need a predetermined reassignment option if the prior pattern returns.”
It’s specific to your scenario because HR already created the two-month window and named you publicly. If they refuse even a checkpoint, that’s information you can use to decide whether staying is worth it.
Treat quitting as a strategic exit, not panic.

Honestly, HR's move on this is utterly brilliant & sublime, and their reasons for doing so are given in a very transparent, trustworthy fashion. Think it through - by putting you IN CHARGE of the man who was formally in charge of YOU, the balance of power is shifted in your favor. This man is now being directed to learn from you ( putting you in a dominant position) as well as depend on you to introduce him to others. Beginnings are fragile things, and his reputation with his new coworkers is 100% in your hands. His ability to make it there can be greatly influenced by you. You have a LOT of power here. Not only that, once the 2-month period is over, what will be established between you and your former lazy boss, will be a tenon of trainor-trainee, leader and subordinate, basically he will always come to you and defer to you, consciously or unconsciously. "Move past the tension" indeed! You now have the chance to act graciously and show the chore-shirker how a supervisor SHOULD behave, and how managerial power looks like WITHOUT abuse. Further, it's inevitable that at some point during the two month period that what happened at the former workplace will be brought up. The two of you can discuss and iron out what occurred there in a manner that's safe for you - with you on the upper hand. Abuse in any human relationship can only occur if the power balance is uneven. He abused his power and therefore you, when he had the upper hand. You now have more power and control than he does, and that's nothing he can do about it. I would think that if you take this opportunity you will both heal and grow in ways that will be very satisfying to you. Also, there's a chance that being offered this responsibility is because you're being considered for a promotion. This could be an evaluation of whether or not to offer you a management position. Either way, it'll look great on your resume. "Trainor at ....."
Instead of disappearing with an empty desk, re-enter with a controlled exit plan: apply internally first (other supervisor, adjacent team) while quietly interviewing externally. Tell HR: “I’m not resigning today; I’m exploring internal reassignment and will make a final decision by [date].”
That protects the 3 years you built, keeps your references clean, and stops them from painting you as “impulsive.” If nothing changes, you still leave—but on your terms, with options lined up.
Heather is facing rising workplace tension after refusing to take on the extra workload left behind by laid-off colleagues. But her decision triggered unexpected consequences with HR, putting her job security and mental health under pressure.
Comments
Don't bother with all that faff. That HR staff already knew what your supervisor had done to you previously by their smile and lack of shock at the news. They didn't support your reaction. That tells me that for some likely unjust reason, they are siding with him. I strongly suspect that they want him to shadow you because they've already planned to oust YOU after 3 months and you are training him for your position. So it's good to leave right now. Any new workplace you can show work evidence, im sure you have some. I would advise them that your position became untenable overnight due to company necessities and be honest if they probe further. You state that you gave your all but no employee would thrive in that toxic position and stress your success just before this situation occurred which highlights your lack of contribution to toxicity. Id leave right away because then they will see that the new supervisor cant work without you like before. I wouldn't be surprised if in a couple months they'll beg you back, at which point you get a friend to anonymously request a written reference from them. You tell them you'll consider a return. Then, reference in hand, say sorry, no im.not returning. I wonder has HR girl and this supervisor hooked up.
Just leave!! The same way you find another job, find a new one, but try to add classes to your preparation, find out what degree or certifications he got that you don't, and study just next time he crosses paths with you, he will be UNDER your Supervision...I just quit a company that does that to an employee, it does not care about you...companies are not our good friends or good relatives they just want to make money...the tide has turned...if I was you, I jump to another boat, if he is lazy as you said, his personality will show up again...if you are capable as you said, the workforce will welcome you again...in another company...life is short, and that plan of checklists and stuff, willl add stress to you...just exit with your head high, let the company sort it out...hope you find a better position somewhere else...everyone deserve to be appreciated, and to work with minimal stress...
Jealous!!! As a worthless cripple waiting to die in legislated poverty after ruining my body for a paycheque, the only hope I have is the govt being forced to give me settlement money for committing genocide on me by having my culture raped and tortured out of me in foster care!
Just because OP takes classes doesn't mean they will be the other persons boss . That's diffently not a guarantee of anything.
They already have the management experience which OP doesn't. But classes just might help him get a better job or a different job away from the new hire
Dont do his work. Let him fire you. Then go collect unemployment while you look for new job. Best to say nothing
I was thinking the same thing!! He sounds creepy AF!! Stage 5 clingler...
How is,it possible. Maybe the two companies in same field?
My first thought was this, she's got to work out why, a conversation must be had with yourself and HR if his usual bad behaviour comes with him once/ if he starts his bad behaviour, I just don't get why they would hire this person in a supervisory position.
Just maybe the OP isn't telling the hole story. Two sides to every story
The hired the other man because they wanted him on their team
In business your feelings don't matter it's all about the company and what's best for the company
Anyone can be replaced anymore unless you're the owner.
After three years. I don't think so ever heard of consequences. Why would the guy be stalking him. He hasn't in three years
I think that's a over reaction and just a little bit paranoid The guy hasn't even talked to him or been around him for three years. You're making a mountain out of a mole hill without any evidence at all to the contrary.
Ignore this AI generated advice. Its emotionless bs. If your company insists on hiring him, it speaks volumes about their attitude towards you : they dont care. They are probably doing this to get you to leave. If so, try to do some reflections. What if the problem is you? If somehow you are the victim of injustices in a row, consider starting your own business, however small it is. If you are as good as you said, it should work.
I agree with the others who've said: Get out, with your head held high. Sorry but the advice in this article is bad advice. It will put you in a stressful, one-down, losing position--and HR there has already shown themselves to be arrogant, punitive and evil. You won't win in any situation you try to design or bargain for, there. You will win by leaving. Yesterday.
HR is not going to not hire someone because a teammate has a problem with that person. Especially when the conflict happened years ago and is not related to the job now
HR hires for the companies needs not because a employee is not happy about who they hired unless the OP was high in the company management position and had a say which OP is not in doesn't have a say in who they hire. OP can't tell a company who to hire. He doesn't have that kind of position or power to do so. He just another employee to HR.Someone who can be replaced
They wanted and hired this new guy for their own reasons and OP has no say. They really over reacted and only hurt themselves in the process. Op can't control who is hired
Op can transfer in the company or leave but they can't control who is hired or where they work
op doesn't have that kind of power to this company.
Well it seems to me you are a lifer at the entry level and have no desire to have a career, all you want is to have a job that anyone can do which you can be replaced by the end of the day. You do realize that at the other company you were also entry level? Entry level employees are the least valuable people at a company and any complaints you have about your job will not be tolerated. Example; your supervisor has a group of entry level employees that he is responsible for that it's his job to get a productive crew to accomplish his assignments, you and the others are his tools to get the job done. If his crew is unproductive then it's his job to find out which tool ain't working and replace it. You were not doing his job for him, you were doing your job in his department, you didn't want to progress your way up in the company by learning higher level positions, becoming a valued asset to the company and by not moving up and refusing to do your job your supervisor fired you. Not for not doing his job, he did his job and fired the one that didn't want to be a productive part of his crew. You went to another company and started in an entry level position there to and parked yourself in a position that that anyone can be trained for faster than it would take to remember to remember 5 names of their closest coworkers, which was proved when you took your low level, invaluable self to HR and said "you ain't gonna..." and they said "oh yes your are" and there were no board meetings, no offers to transfer to another department, no redirecting him to another department because after three years you have moved up to a valuable, important part of the company no you quit before they fired you for not doing what you were assigned to do and you were probably replaced before the day was over.
Very well said
The sooner you realize companies do not care about you the better. Whether you been there 3 years or 30 makes no difference to them. Move on to the next crappy dead end job.
This has to be a joke! Or a woman who posted this. Did you really think that you had that kind of power at that company? When they hired him they didn’t ask for your opinion for a reason! And it seems you didn’t know that reason. It’s because they didn’t care about your opinion and or feelings about the hiring! You obviously don’t have anyone who depends upon you to provide or you would just do your job and shut up! If your supervisor asked you to do a job and you didn’t do it. That’s grounds for termination. So you weren’t fired unjustifiably. And you should
start looking for a new job now. Because you will be fired soon!
Look this happened to me and worse. I had bullying by managers and worse, a boss even came to my house drunk and yelled abuse about me to my husband. Not one person internal or external cared or took on my complaint. At the end of the day they had me checkmate after years of struggling to keep my career, spending hundreds and thousands on university and missing many Christmas and birthdays of my sons. So instead of fighting in the end I secretly had days off to attend interviews for jobs, less paid ones as a junior to start all over again in my 40s. Well I was offered a job. I resigned because HR work for the company not you, no one will fight for you and you are like me checkmate. I left with dignity and everyone felt sorry for me, low and behold the bosses apologized but I said well you want to fire me... don't bother I fire myself haha.
I'm a lot happier now in a place that takes bullying more serious, it's a lot less money however I'm left alone at work.
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