Lewa has a total ranger force of 147 men. Maintaining high motivation and moral through training, high quality equipment issues and uniforms, and good working and living conditions instills a sense of pride in the ranger force resulting in a dedicated and efficient conduct of their responsibilities.

The ranger force includes armed rangers, Tracker dog team, predator monitoring and tracker team, rhino surveillance teams (who keep a daily check and count of Lewa's rhino), 24 hour operations room coverage (connecting Lewa to Kenya Police, Kenya Wildlife Service, Anti Stock Theft Unit, Laikipia Wildlife Forum, all the community conservation areas that Lewa is involved in, and many other stations), night guards for buildings and equipment, rangers manning eleven entrance gates and a team of fencers whose role is to maintain the 140 km long electric game fence.

Aerial surveillance is a vital aspect of Lewa's security operation. Aerial reconnaissance of the Conservancy and surrounding wildlife areas are carried out on a regular basis in Lewa's Super-cub aircraft. Lewa has three experienced, resident pilots and the aircraft is used as back up to armed contacts when necessary and various security related follow-ups. Two of the pilots are Kenya Police Reservists and the aircraft has been called out to support incidents of stolen stock from communities, elephant and rhino poaching incidents and armed banditry attacks, with great effect. Regular reconnaissance flights are carried out in conjunction with The Kenya Wildlife Service based close to Lewa, in a concerted attempt to keep a close eye on elephant movements and their whereabouts. The ability to carry out aerial surveillance is one of Lewa's most important tools in the fight against poaching and insecurity in this region.