I hate to be the bearer of (more) bad news, but from a composition standpoint, it's extremely weak as well.
It reads like the transcription of one of those annoying TV news interviews with John Q. Public, where the interviewee uses big words and fancy phrases that he doesn't fully understand, in an attempt to sound smart. But the nuanced meaning of the phrases doesn't make sense in the context in which they are used.
Was English your second language? I get sort of a non-native speaker vibe from your diction and structure.
Some examples of what I'm talking about...
I will be a great asset to this field
You aren't an asset to a field; you are an asset to an organization.
Some people join the navy in order to serve their country, in fulfilling their patriotic duty. While others make their decisions on a knowledge base in order to strengthen their education and improve their careers.
"In fulfilling their patriotic duty" doesn't make sense. I think you mean they join
to fulfill their patriotic duty. This is one of the reasons I question whether you are a native speaker, since I know English pronouns are a bitch and there is often little rhyme or reason to when you use "to" vs. "for", for example. Oh, and this second sentence is a fragment. Since it starts with "while", it should be part of the first sentence as it is part of the same thought.
However, I would like to think that I belong to neither specific group but intend on being the middleman.
The word "specific" is awkward and completely unnecessary. It's clear what 2 groups you are talking about, so I don't know what you intended the word" specific" to add to the meaning of the statement. Also, you tie the phrases together with a "but", yet they don't really have that kind of relationship to each other.
Do you not know which group you are in? "I would like to think" suggests that it is merely just a hope or a goal that you are in that group. Be definitive. State the you belong to neither group, not that you would like to think--implying aspiration as opposed to actuality or certainty--you belong to neither.
The word "middleman" has a somewhat negative connotation. He's the annoying guy in the middle who adds little value to a transaction.
A better approach for this whole segment is to lay out the 2 reasons why people join and then say that you feel both things strongly, not that you are a wishy washy guy in the middle who feels "neither" of those things. You aren't neither, you are both.
Since you've already gotten a lot of feedback on content, I won't continue my copy edit since it will be useless after a major rewrite, but after you shape up the content, if you repost, I'd be happy to do another copy edit.