Here is my first entry for your project. The main concept here is a simple yet appealing and professional design that uses 2 hands to form a dove. The 2 hands represents the joining of people as a group while the dove symbolizes a vessel in the Christian Scripture, very much like the Holy Spirit. Clean and Vibrant which appeals to mostly everyone especially young adults.
This design works great in color and in black & white. It also scales pretty well.
Looking forward to your feedback. Thanks and have a nice day!