Cath Lee, chief executive of the SCC, has become chief executive of the new charity. Karen Heenan, chief executive of CTN, has become director of the new organisation but will stand down in July.
Lee said she did not envisage making any redundancies as a result of the merger. The two organisations employ six staff between them, equating to 5.5 full-time equivalents.
The SCC has an office in London and CTN is based in Guildford, Surrey. Both offices will be kept. Lee said the merger would enable the two organisations to become more efficient by, for example, reducing the amount of staff time spent doing research.
"The current climate means that we all have to look at how we can be most effective," she said. "With the Charity Commission cutting back on services and other umbrella providers losing funding in this area, we anticipate that all charities and trustees - but particularly small charities - will have a greater need for support in the challenging months and years ahead."
The SCC was established in January 2008 to help small charities share resources, skills and experience to help them achieve their objectives. CTN was founded in 1998 to provide information and discussion forums for trustees, as well as trustee recruitment services.