Signal Theory is a U.S.-based marketing and branding agency that helps companies build stronger brands using behavioural science and consumer insights. The firm provides services including brand strategy, advertising, design, and analytics to drive customer engagement and business growth.

SITA is a global air-transport IT and communications provider delivering technology used by airlines, airports and governments โ including passenger processing, baggage systems, airport operations, aircraft data connectivity, flight operations tools and air-to-ground communications.
SK&Y Associates is an aviation consultancy and aircraft remarketing firm specialising in the acquisition, disposal and transaction management of used commercial jet aircraft, providing market analysis, sourcing, sale/lease campaigns and advisory support for airlines, lessors and investors.
Skyworld Aviation is an aircraft marketing and remarketing firm specialising in regional aircraft, providing consultancy, aircraft sales, lease management and transaction support for airlines, lessors and investors.
SMIT Aviation is a UK-based aviation services company that provides aircraft leasing, charter, and ACMI (wet lease) solutions, along with aircraft sales and asset management support to airlines and operators worldwide.
Airlink (Pty) Ltd is a privately owned regional airline based in South Africa, operating scheduled passenger and cargo services across more than 45 destinations in Southern Africa; it provides reliable regional air transport, connecting smaller cities and remote locations with major hubs to support business and leisure travel.
South African Airways (SOC) Ltd is the national flag carrier of South Africa, operating scheduled passenger and cargo flights from its hub in Johannesburg to destinations across Africa and select international routes; it provides full-service air transport including passenger travel, cargo logistics, and loyalty programmes as part of the global airline network.
Southern Airways Express (iflysouthern.com) is a regional airline in the United States that offers scheduled short-haul passenger flights and on-demand charter services, primarily connecting smaller cities and communities with larger hubs, and operates under the Surf Air Mobility group.
SPARFELL is a Switzerland-based private aviation company providing aircraft charter, aircraft management, leasing, and trading services for business aviation clients worldwide. It operates a fleet of private jets and offers end-to-end aviation solutions including acquisition, operations, and concierge services.
An aviation management and consulting services provider offering strategic operational support, capability development, specialist staffing and mission support for aviation companies, governments, and organisations operating in challenging environments.
StandardAero is a global aerospace maintenance, repair and overhaul (MRO) and support services provider that specialises in engine, airframe, and component maintenance, repair, overhaul and testing for commercial, business aviation, military, and industrial customers around the world.
Strom Aviation is a U.S. aviation staffing and recruitment company that specialises in connecting skilled aviation professionals (like aircraft mechanics, technicians and other specialists) with employers in the aerospace and aircraft maintenance sector, as well as supporting workforce and contractor placement services.