Who I Worked With or Whom I Worked With
The confusion comes from one small word: who or whom. Many English learners are taught that who is for the subject and whom is for the object.
That rule is useful, but real English is a little more flexible.
The phrase becomes even more confusing because with comes at the end. You may wonder whether the person after with should be who or whom.
You may also have heard people say, “Whom did you work with?” in formal English, while everyday speakers usually say, “Who did you work with?”
The good news is that this is easier than it sounds.
In modern everyday English, “who I worked with” is the natural and most common choice. It sounds normal in conversation, emails, interviews, and most general writing.
“Whom I worked with” is grammatically possible and more formal, but it can sound stiff in casual conversation.
There is also a very formal version: “with whom I worked.” This follows the traditional grammar rule by placing the preposition with before whom.
Once you understand the role of who, whom, and the preposition with, choosing the right form becomes much easier.
What Does “Who I Worked With” Mean?
Who I worked with means the person or people I worked together with.
Here, who refers to the person you worked with. The phrase can be used when you are talking about a former colleague, manager, teammate, client, classmate, or anyone else you worked alongside.
For example:
- Who I Worked With or Whom I Worked With
- Do you remember who I worked with at my old company?
- I told my friend who I worked with on the project.
- He asked me who I worked with during the internship.
- That is the designer who I worked with in 2025.
- I know who I worked with on that assignment.
- Can you remind me who I worked with yesterday?
- Who I Worked With or Whom I Worked With
In all these examples, who introduces information about the person or people involved.
Why Is “Who I Worked With” So Common?
The main reason is simple: modern English usually prefers “who” in everyday speech, even when traditional grammar would call for whom.
Consider this sentence:
Who I Worked With or Whom I Worked With
If we turn Sarah into a question, we naturally say:
Who did you work with?
Most native speakers would use this form without thinking twice.
The same pattern appears inside a longer sentence:
Who I Worked With or Whom I Worked With
This sounds natural and conversational.
You might occasionally see “whom” in formal writing, but who has become the normal choice for many speakers.
The Grammar Behind It
Traditionally, who is a subject pronoun, while whom is an object pronoun.
For example:
- Who called you?
- Who I Worked With or Whom I Worked With
In the first sentence, who performs the action of calling.
In the second sentence, whom receives the action of calling.
But with a preposition such as with, modern English often allows the preposition to stay at the end:
Who I Worked With or Whom I Worked With
This is called a stranded preposition. It is completely normal in English.
The same structure appears in:
Who are you talking to?
Who did you go with?
Who are you staying with?
Who I Worked With or Whom I Worked With
These forms are extremely common in natural conversation.
Is “Who I Worked With” Grammatically Correct?
Yes. It is standard and natural in modern English.
Who I Worked With or Whom I Worked With
For everyday English, this is often the best choice:
She is someone who I worked with for several years.
It is clear, natural, and easy to understand.
What Does “Whom I Worked With” Mean?
Whom I worked with has the same basic meaning as who I worked with.
It refers to a person or people you worked with. The main difference is style and grammar tradition, not meaning.
For example:
Who I Worked With or Whom I Worked With
This means:
She is the manager I worked with last year.
The use of whom makes the sentence sound more formal or traditional.
Here are some examples:
- He is the professor whom I worked with during my research.
- Who I Worked With or Whom I Worked With
- That is the lawyer whom I worked with on the case.
- I remember the team whom I worked with.
- They hired the consultant whom I worked with before.
- He introduced me to the engineer whom I worked with.
- She thanked the people whom she worked with.
- Who I Worked With or Whom I Worked With
These sentences can be grammatically acceptable, especially in formal writing.
Why Does “Whom” Sound More Formal?
Whom has become less common in everyday spoken English.
People often use who instead because it sounds more natural and easier to say.
Compare these:
Who I Worked With or Whom I Worked With
and
Whom did you work with?
The second sentence is traditionally grammatical, but many speakers find it formal or slightly old-fashioned.
This does not mean whom is useless. It still appears in:
- formal writing
- academic writing
- legal writing
- official documents
- careful edited prose
- fixed expressions
For example:
Who I Worked With or Whom I Worked With
is still a common formal expression.
You may also see:
The person with whom I worked
in formal writing.
“Whom I Worked With” vs. “With Whom I Worked”
There is an important difference in style between these two:
Who I Worked With or Whom I Worked With
The person with whom I worked
Both can be grammatically correct.
The second version places the preposition with before whom. This is the traditional formal structure.
The first version leaves with at the end. This is called preposition stranding.
In everyday English, people usually prefer:
The person who I worked with.
In formal English, you may prefer:
The person with whom I worked.
Difference Between “Who I Worked With” and “Whom I Worked With”
The two phrases usually have the same meaning. The biggest difference is how they sound and where they are normally used.
| Point | Who I Worked With | Whom I Worked With |
|---|---|---|
| Meaning | A person I worked with | A person I worked with |
| Everyday speech | Very common | Less common |
| Informal writing | Natural | Formal-sounding |
| Formal writing | Acceptable | More traditional |
| Grammar tradition | Less traditional in this position | Traditional object form |
| Tone | Natural and conversational | Formal or careful |
| Best for normal conversation | Yes | Usually no |
| Very formal alternative | — | With whom I worked |
Meaning Difference
There is no real difference in meaning between the two phrases.
For example:
Who I Worked With or Whom I Worked With
and
She is the woman whom I worked with.
Both tell us that the woman and the speaker worked together.
The difference is mainly about grammar style and register.
Usage Difference
If you are speaking to a friend, coworker, or classmate, who is usually the better choice.
Who did you work with?
This sounds completely natural.
If you are writing a highly formal document, whom may be suitable:
The consultant with whom I worked provided valuable advice.
But you do not need to force whom into ordinary sentences.
Sentence Structure Difference
Look at these three versions:
Natural everyday English:
Who I Worked With or Whom I Worked With
Formal but acceptable:
I remember whom I worked with.
Very formal:
Who I Worked With or Whom I Worked With
The meaning is almost identical. The tone changes.
Grammar Rules You Must Remember
Rule #1: Use “Who” Naturally in Everyday English
When you are speaking normally, who is usually the easiest and most natural choice.
For example:
Who did you work with?
Who I Worked With or Whom I Worked With
She asked who I worked with.
You will hear this pattern constantly in real conversations.
Do not worry that using who makes your English bad. It does not.
Rule #2: “Whom” Is Traditionally Used as an Object
Traditional grammar says that whom is used when the person is an object.
For example:
Who I Worked With or Whom I Worked With
Here, you are doing the inviting, and whom receives the action.
With a preposition:
With whom did you work?
The person is the object of the preposition with.
This is the traditional grammatical structure.
However, natural modern English often changes this to:
Who I Worked With or Whom I Worked With
Both patterns can be understood, but the second is much more common in ordinary conversation.
Rule #3: “With Whom” Is More Formal Than “Who … With”
When with comes before the pronoun, whom is traditionally required:
Who I Worked With or Whom I Worked With
This is formal and grammatically traditional.
In normal conversation, however, most people are more likely to say:
Who did you work with?
The same idea appears with other prepositions.
Formal:
Who I Worked With or Whom I Worked With
Natural:
Who did you speak to?
Formal:
With whom are you traveling?
Natural:
Who are you traveling with?
The choice depends on the level of formality.
Rule #4: Use the “He/Him” Test When You Are Unsure
A useful grammar trick is to replace who/whom with he/him.
If he sounds right, use who.
Who I Worked With or Whom I Worked With
For example:
___ called you.
You would say:
He called you.
So the correct word is:
Who called you?
Now try:
You called ___.
You would say:
You called him.
So traditionally:
Who I Worked With or Whom I Worked With
With work with:
Who I Worked With or Whom I Worked With
Because him is the object of with, traditional grammar favors:
Whom did you work with?
But remember the important modern-English point: native speakers very commonly use “who” here, especially in conversation.
Common Mistakes Students Make
Mistake 1: Thinking “Whom” Is Always More Correct
Some learners believe that whom should always be used when the person is not doing the action.
That is too simple.
English has changed over time, and who has replaced whom in many everyday situations.
So this sentence is perfectly natural:
Who did you work with?
You do not need to change it just to sound educated.
Mistake 2: Thinking “Who I Worked With” Is Always Wrong
This is one of the most common misunderstandings.
A student may see:
Who I worked with
and think:
“It must be wrong because who is an object.”
But modern English does not work that rigidly.
For everyday communication, who I worked with is widely accepted and natural.
For example:
He is the colleague who I worked with last summer.
There is nothing wrong with this sentence in ordinary English.
Mistake 3: Using “Whom” Everywhere
Another learner may try too hard:
Who I Worked With or Whom I Worked With
This is grammatically traditional, but it may sound overly formal in casual conversation.
A friend would normally say:
Who are you going with?
The goal is not simply to use the most formal grammar possible. Good English also means choosing language that fits the situation.
Mistake 4: Avoiding Both Words in Awkward Ways
Some learners become so worried about who and whom that they rewrite the whole sentence.
For example:
The person I worked together with…
This is not necessarily wrong, but it may be unnecessary.
You can simply say:
Who I Worked With or Whom I Worked With
or, in formal writing:
The person with whom I worked…
Keep the sentence simple when you can.
Mistake 5: Confusing “Who” With “Whose”
Remember that whose is different.
- Who = which person
- Who I Worked With or Whom I Worked With
- Whose = belonging to which person
For example:
Who worked with you?
Whom did you work with?
Whose project did you work on?
Learning these three forms separately can make English questions much easier.
Easy Trick to Remember the Difference
Here is the simplest trick:
Think: “Who = he, Whom = him.”
If you can replace the word with he, traditional grammar points to who.
If you can replace it with him, traditional grammar points to whom.
For example:
Who I Worked With or Whom I Worked With
Try:
He worked with you.
That works, so who is correct.
Now:
Whom did you work with?
Try:
Who I Worked With or Whom I Worked With
That works, so traditional grammar chooses whom.
But there is one more thing to remember.
Real-life English often prefers who, especially when the preposition comes at the end.
So you can think of the rule this way:
Formal/traditional: Whom did you work with?
Natural/everyday: Who did you work with?
Very formal: With whom did you work?
This three-part pattern is worth remembering.
Daily Life Examples
Here are some natural examples you might hear at work, school, or in everyday conversation.
1. Talking About a Former Job
A: Who did you work with at your last company?
B: I worked with Sarah and Mike.
This is the most natural conversational form.
2. Talking About a Project
A: Who did you work with on that project?
B: I worked with three designers.
Who I Worked With or Whom I Worked With
3. Talking About an Internship
The manager who I worked with was very helpful.
You could use whom, but who is more relaxed.
4. Talking About a Teacher
She is the professor who I worked with during college.
This is perfectly natural in everyday English.
5. Talking About a Former Colleague
Do you remember who I worked with at the old office?
This is a normal question.
6. In a Formal Report
The consultant with whom I worked provided useful recommendations.
Here, the formal structure fits the writing style.
7. In a Job Interview
I worked with a team of five people.
If the interviewer asks:
Who did you work with?
you can answer naturally without worrying about whom.
8. Talking About a New Team
Who I Worked With or Whom I Worked With
This sounds friendly and natural.
9. Formal Business Writing
The engineer with whom I worked completed the design on time.
The wording is more formal and polished.
10. Casual Conversation
A: Who are you working with now?
B: I’m working with the marketing team.
Nobody would normally expect whom in this casual situation.
Practice Section
Choose who or whom in each sentence. Remember that the answers may depend on whether you want natural everyday English or traditional formal grammar.
1. Who/Whom did you work with last year?
2. She is the person who/whom I worked with.
3. Who/Whom did Sarah invite to the meeting?
4. The manager with who/whom I worked was very kind.
5. Do you remember who/whom I worked with?
Answers
1. Who — This is the natural choice in everyday English: Who did you work with last year? Traditional formal grammar may use whom.
2. Who — She is the person who I worked with is natural modern English. Whom is also possible in formal usage.
3. Whom — In traditional grammar, whom is the object of invite: Whom did Sarah invite? In everyday speech, however, Who did Sarah invite? is extremely common.
4. Whom — After the preposition with, traditional grammar uses whom: with whom I worked.
5. Who — Do you remember who I worked with? is natural conversational English.
FAQs
What is the difference between “who I worked with” and “whom I worked with”?
There is usually no difference in meaning. Both refer to the person or people you worked with. The main difference is style. Who I worked with is more natural in modern everyday English, while whom I worked with sounds more formal or traditional.
Is “who I worked with” grammatically correct?
Yes. Who I worked with is widely accepted in modern English and is especially common in speech and informal writing. English often allows a preposition such as with to appear at the end of a sentence or clause.
Is “whom I worked with” correct?
Yes, especially under traditional grammar rules. In whom I worked with, whom is the object of the preposition with. The phrase is more formal than who I worked with, but it is not normally needed in casual conversation.
Should I say “who did you work with” or “whom did you work with”?
For everyday conversation, “Who did you work with?” is the best choice. It sounds natural and is used very often by native speakers. “Whom did you work with?” is more formal and follows the traditional object-pronoun rule.
Is “with whom I worked” better than “whom I worked with”?
With whom I worked is more formal because the preposition with comes before whom. It can work well in formal documents or academic writing. Who I Worked With or Whom I Worked With.
Can I use “who” instead of “whom” in modern English?
Yes. In many everyday situations, who is replacing whom. This is especially common in questions and when a preposition is placed at the end. You should still recognize whom because it appears in formal writing and expressions such as to whom and with whom.
Conclusion
The choice between who I worked with and whom I worked with is easier once you stop treating it as a simple right-or-wrong question.
Who I worked with is the natural choice for most everyday English. You can use it in conversation, casual emails, interviews, and ordinary writing without worry.
Whom I worked with follows the traditional object rule and sounds more formal. It is still correct in many formal contexts.
If you want an especially formal structure, you can move the preposition to the front and say with whom I worked.
The most useful everyday sentence is simple:
Who did you work with?
If you remember the traditional he/him test, you will also understand why whom exists. Just remember that modern English does not always follow the old rule strictly.
So, when speaking naturally, who is usually your safest choice. Use whom when the tone calls for more formal or traditional English.
