Riverside-backed Red Nucleus, a provider of strategic learning and development, scientific services and advisory, completed the acquisition of Human Element Solutions, an events, video, digital content provider. Financial terms were not disclosed. "Our focus on the human element, connecting people with content in the most engaging and effective manner possible, and commitment to delivering high-quality solutions to our clients will remain unchanged; however, our ability to provide our clients with additional service offerings will expand significantly,” Nate Johns, Human Element Co-Founder.