Why am I still not loosing weight?

Male or female? Calorie intakes differ.

You can get stronger rather than weaker with some training. Are you doing any strength exercises when you go to the gym? I’d switch to every other day to the gym to give your body time to recover.

When you walk on the job do you change the pace? Do you switch shoes halfway through the shift?

You are adding cardio to cardio. Try switching to strength exercises.

Change your speed back and forth during your shift. This will strengthen your muscles and reduce exhaustion.

Changing your shoes mid shift will also help with exhaustion.

My first question is, how are you calculating your food intake? Are you weighing all solids on a digital scale and measuring liquids? Are you using cups/spoons for everything? Or are you estimating?

Before going any further we need to know that you are actually eating the number of calories you think you are.

And as Jgnatca said, you're doing cardio on top of cardio. I know it seems like that should result in more weight loss, but sometimes it does the exact opposite, or at least appears to. This is because excessive cardio raises cortisol (stress hormone) levels, which can cause water retention, which in turn masks fat loss because the number on the scale stays the same, or even goes up. Switch to strength training, three days a week. You don't need more cardio on top of your job.

Do you have an activity tracker that tells you the number of steps you do per day? That could be helpful in assessing what your calorie intake should be. If the app you downloaded is this one, I would put you at highly active for your activity setting when calculating your calorie needs.