SalamunAlykum, Janab I am working in non muslim office due to my office work it’s very difficult to offer my prayer in office so I use to offer my afternoon prayer sitting on my desk itself before it get qaza and also in the evening I again offers qaza of these prayer at home. Is my act is correct in my condition

ws, they know ur Muslim,why scare tell them clearly i need lunch time to use offer my prayer and do quick just wajib arkan if very difficult to offer do ur best before qaza,but work is every day n prayer is also every day so be fair.