In the Guernsey office, James Cooke has been promoted to managing associate and Sam Dingle has been promoted to senior associate.
In Jersey, Josephine Howe and Katherine Neal have both become managing associates.
The law firm said it comes as part of its continued investment in training.
In June, the management buy-out by the partners of Ogier Fiduciary Services from the Ogier group was completed.
The buy-out, first announced in February, was backed by Electra partners, who invested £82m of equity on behalf of their major client Electra Private Equity, alongside a significant investment by the Ogier Fiduciary Services’ management team.
