JSFiddle - React, Tailwind, and code Playground

HTML

<select><select>

JavaScript

var jsonString = '[{"JD_No":1,"JD_Name":"Network Administrator"}, {"JD_No":2,"JD_Name":"System Administrator"}, {"SUMKEY": 3, "SUMNAME": "RANDOM KEY NAME"}]';

var json_data = JSON.parse(jsonString);

for(var i = 0; i < json_data.length; i++){

    var option = $("<option>");

    for( var key in json_data[i] ){
        // There should only be two keys, if its a number its ID, else option name
        if( typeof json_data[i][key] === "number" ){
            option.attr("value", json_data[i][key]);
        }else{
            option.html(json_data[i][key]);
        }
    }

    $("select").append(option);

}