contacting
v.v. to communicate with someone by calling them, writing an email, or meeting them in person. You use this when you want to reach out to a person or a company.
v. to communicate with a person or organisation by phone, email, or in person. Transitive — requires a direct object representing the entity being reached.
I am contacting the office to ask about my application.
After seeing the job advertisement, she spent the afternoon contacting several former colleagues to ask for a reference.
The legal department is currently contacting all affected parties to ensure they are fully informed of their rights before the mediation process begins next month.
The verb is transitive and takes a direct object without a preposition.
I am contacting with himI am contacting himThe verb 'contact' is transitive and does not take the preposition 'with' — learners often confuse it with the noun 'contact' which does use 'with'.