if you want to be taken seriously...

...don't use Comic Sans MS in your email sig. Just don't. I suppose you can use it for your own name to try to give the impression that you're "just a simple, ordinary guy", but under no circumstances use it for your job title or employer. Form reinforces or contradicts content, people. Seeing the words "analyst", "engineer", "senior" in Comic Sans MS font is irrepressibly funny, and I will proceed to mentally point and laugh at your correspondence.

It's also rather disheartening to read the word "services" in Comic Sans MS as part of your employer's name. It really doesn't shore up your customers' confidence that they're buying high-quality expertise...