Initialism of sustainer engine start.
Initialism of second engine start.
Initialism of secondary engine start.
Initialism of State Emergency Service, any of various state-based emergency service organisations, staffed by volunteers and operating within state legislation.
The SES in Western Australia is another operational arm of the Fire and Emergency Services Authority.
Initialism of Senior Executive Service, a high-ranking position classification of the civil service (public service).
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It has often been suggested that Australian governments by adopting the SES model are gradually following United States practice where senior levels of the public service are staffed by political appointments of the president.
Initialism of Simple Email Service.