Bristow Helicopters is to shed 12 engineering jobs across its operations in Shetland and Aberdeen.
The company recently lost work with Dana Petroleum and BP.
A spokesman for Bristow said it was in consultation with trade unions and employees over the proposals to make the redundancies.
He added that Sumburgh remained a strategically important location for the company and would continue to maintain operational facilities there.
The company also operates a search and rescue contract at Sumburgh Airport.