Have you checked that there are buses to your destination in Hertford at the necessary times? If you need a bus from both East and North stations then you must be working an uncomfortable distance from the town centre. I have looked at a random selection of timetables for routes at Hertford North and the best frequencies seem to be 1 per hour.
To be honest if you aren't within walking distance at the Hertford end then I would seriously consider driving if you can.
I calculated using both TfL's and Google Maps journey planners.
Google Maps seems to say that the 395 bus connects well with the train and takes me to Fairfax Road, which is then easily walkable to the office. TfL is more pessimistic and requires a 20 minute walk after a bus. Now, I walk 10 minutes to the station from my work, so double that and it's not so much of a problem if I walk on a level surface.
The most reliable method is going via Silver Street and Hertford East and walking 25 minutes direct to the office.
This is at least until I learn to drive and the commute becomes a dream.