senmonka no renrakusaki wo kaisya ni tutaete kudasai.

の connects two nouns. In this sentence, it shows that 連絡先 is associated with 専門家.

So:

• 専門家 = expert, specialist
• 連絡先 = contact information, contact details
• 専門家の連絡先 = the expert’s contact information / the contact details for the expert

This noun + の + noun pattern is extremely common in Japanese.

連絡先 means contact information or contact details.

It can refer to things like:

• a phone number
• an email address
• a mailing address
• other ways to reach someone

It does not mean the act of contacting someone. It means the information you use in order to contact them.

を marks the direct object of the verb.

Here, the thing being passed on or conveyed is 専門家の連絡先, so that is why it takes を:

• 専門家の連絡先を = the expert’s contact information (as the thing being conveyed)

With 伝える, a very common pattern is:

• A を B に 伝える
  = convey/tell/pass on A to B

In this sentence:

• A = 専門家の連絡先
• B = 会社

Because 会社 is the recipient or target of the information.

With verbs like 伝える, に often marks the person or organization that receives the message:

• 先生に伝える = tell the teacher
• 友だちに伝える = tell a friend
• 会社に伝える = tell the company / pass it on to the company

So に here does not mean physical location. It marks who the information is being conveyed to.

It is:

• 伝える = dictionary form
• 伝えて = て-form
• 伝えてください = please convey / please tell / please pass on

The pattern てください is a standard polite way to ask someone to do something.

So 伝えてください means:

• please tell
• please convey
• please pass on

depending on context.

It is a polite request, not a harsh command.

Compared with English, it often feels like:

• Please tell ...
• Please pass on ...

It is polite and very common in everyday and business Japanese.
A stronger, more direct command would sound different.

Both can sometimes be translated as tell, but they are not exactly the same.

• 教える often means teach or inform someone by giving them information
• 伝える means convey, pass on, or relay

In this sentence, 伝える suggests passing the expert’s contact details along to the company. That makes it a very natural choice.

So the nuance is closer to:

• Please pass the expert’s contact details on to the company

rather than simply:

• Please teach the company the expert’s contact information

By itself, 専門家 does not show singular or plural clearly.

So 専門家の連絡先 could mean:

• the contact details of an expert
• the contact details of the expert
• in some contexts, even experts’ contact details

Usually the context tells you which one is meant. Japanese often leaves number unspecified unless it needs to be clear.

Japanese does not have articles like the and a/an.

That means a noun like 専門家 can mean:

• an expert
• the expert
• experts

depending on context.

The same is true for 会社:

• a company
• the company

So when translating into English, you choose the article that makes the most sense from the situation.

No, not in this sentence.

Although に can mark a place, here it marks the recipient of the information.

So:

• 会社に伝える = tell the company / convey it to the company

If it were marking a location, the meaning would be different. Here the sentence is about communication, not physical position.

No. Standard Japanese is normally written without spaces between words.

So this would usually be written as:

専門家の連絡先を会社に伝えてください。

Spaces are often added in learning materials to help beginners see the parts of the sentence more clearly.

A good breakdown is:

• 専門家の連絡先 = the expert’s contact information
• を = object marker
• 会社に = to the company
• 伝えてください = please convey / please tell

So the overall pattern is:

• [thing being conveyed] を [recipient] に 伝えてください

This is a very useful pattern to remember for practical Japanese.