Unable to automatically index nested json as nested type elastic search

Elastic Stack Elasticsearch
4

So my actual json is like this. The above was just a shortened version -

employee
    {
      "id":"1",
     "firstname":"managerFirst",
     "lastname":"managerLast"
     "email":"test",
     "address":"test",
     "gender":"male"
    assistants:[
    {
       "id":"122"
       "firstname":"assistant1",
       "lastname":"assistant1Last"
    },
    {
       "id":"234"
       "firstname":"assistant2",
       "lastname":"assistant2Last"
    }
    ]
    }

Given the above json do you recommend storing assistants as a nested type ? @Mark_Harwood
My requirement is that i want to be able to retrieve parent docs using properties of a child such that retrieve all managers who have an assistant named test.

I was able to search using a match query on assistants.firstname and assistants.lastname but could this cause me any problems in future that i am not aware of or is this way of searching totally fine given my requiremnt and document strcture