Need to rephrase the following questions:

Acting as a mandate for a federal agency, I skillfully assisted various organizations (for-profit and not-for-profit) receive federal grants and subsidies. I reliably helped various constituents with their immigration matters, contacting US Embassies around the world.

In the position of loan specialist I analyzed and processed applications for commercial mortgages and unsecured loans. I also facilitated the loan closures and obtaining quotes for property and casualty insurance.

As an analyst I delivered solutions for production and performance enhancement, implemented change management. My primary responsibilities were financial and managerial accounting, and analysis of financial statements.

Please note that I am first time user of this forum, so I apologize you find my repeated posts in various sections annoying. Please let me know if I should rather simply post these questions in "General English Grammar Questions" section.

Thanks in advance , or . (Should I be using full stop or comma?)