The winter thaw finally has occurred in some parts of the United States and that includes a flurry of new business contracts being signed in the past few months.

The Massachusetts Dental Society extended its contract with its preferred registration partner, Convention Data Services, through 2017.

Under the agreement, CDS will continue to provide full registration services, membership integration, CEU application, lead management and exhibitor services for the annual Yankee Dental Congress.

“For the past nine years, the Massachusetts Dental Society has chosen to use CDS for registration and lead retrieval for its flagship event, the Yankee Dental Congress. … Their onsite team is proactive and extremely customer service oriented. Their development team is always willing to research new ideas. There are twists and turns in producing any event, and it is reassuring to know that we have CDS there to help manage any registration problems that come our way,” says Alisa Ufland, director of marketing, Massachusetts Dental Society.

The congress, New England’s largest dental meeting and the fifth largest dental meeting in the U.S., draws nearly 28,000 attendees from around the country.

The American Society of Nephrology appointed SPARGO as their housing management company for their 2015, 2016 and 2017 annual ASN Kidney Week meetings.

In addition, ASN appointed SPARGO as their registration management company for ASN Kidney Week 2015.

This week-long event attracts upwards of 13,000 attendees from more than 100 different countries around the world.

ASN Kidney Week provides attendees with opportunities to exchange knowledge, learn the latest scientific and medical advances and listen to discussions with leading experts in the field.

SPARGO currently handles ASN’s Expositions sales and management as well.

Vision Source, North America’s premier network of private practice optometrists, has selected Experient to be their preferred provider for unified event services including sourcing, planning, registration, housing, mobile app and lead retrieval. These services will be featured at The Exchange 2015, their annual member meeting, and will return each year through 2020.

“Since 2011 Experient has been providing the highest levels of consultation, event services and technology to Vision Source’s annual meeting, The Exchange,” said Randy Sones, Vision Source’s vice president of Marketing and Advertising.

He added, “Experient’s unified suite of event services yields vaulable demographic and behavioral data that we use to design better experiences for our guests.”

Founded in 1991, Vision Source is North America’s largest network of independent optometrists consisting of nearly 4,000 industry influencers.