JSFiddle - React, Tailwind, and code Playground

HTML

<select>

</select>

<button>
  Click me to bind
</button>

JavaScript

var data = [{"employee_id":"1","first_name":"Ganesh","last_name":"Mulay"},
 {"employee_id":"2","first_name":"Rahul","last_name":"kumar"},
 {"employee_id":"3","first_name":"Kiran","last_name":"Raj"}
];

$("button").on("click", function() {
	var $select = $("select").empty(); // Click options
  for (var i = 0; i < data.length; i++)
  	$("<option/>").text(data[i].first_name + " " + data[i].last_name).val(data[i].employee_id).appendTo($select);
});