I don’t know THE hashkafa, but can repeated what my Rebbe told me the day before I started my first job.
Remember, you are going to work to earn a parnassa so that you can provide the necesseties for your wife and children. You are not a lowlife for leaving the beis medrash to fulfill this task. Remember though, that it is important to have fixed times for learning, both morning and night that no matter what, you will always keep. Tefilla, with a minyan, is a no brainer and should always be kept. If situation arises that might compromise either tefilla with a minyan or fixed learning schedule, call me to discuss. On days when there no work (sunday, legal holiday) increase your learning by adding an additional seder. While at work, remember while you are there. To do your job, not to become the most popular person in the office. Don’t go for drinks with the guys, or “do lunch” with them, even in a kosher restaurant. Be cordial to them, don’t become their best friends. The females in the office, if they say hellow, or if it is obvious you are purposely ignoring them, say good morning, no need to get into discussions. If working on project with females, be sure other males are always around too, preferably as part of the team. If not sure how to proceed, I am always available for you to call. Do so.
Nothing about pursuing hevel havalim, nothing about how I am low life for taking a job and leaving the kollel and nothing about how this is not what hashem wants from me.