Roger founded his own aviation company Leach Aero Services and Central Australian Helicopters (CAH). Leach Aero serviced outback station aircraft along with charter company aircraft throughout Central Australia, Mt. Isa in Queensland and the Barclay region north of the Alice. Central Australian Helicopters serviced the cattle mustering throughout the Northern Territory. The jet helicopters were used for the tourist industry, mining and evacuation work during the wet season. The Hughes 500D did a trip to Heard Island in the Antarctic to support the teams of scientists doing research in the local areas both on land and on the ocean The aircraft was there for a summer season and then returned to Australia by boat to Perth WA. Riding their wave of success, Roger would form Skyport, an umbrella for the group’s tourist operations, which included the acquisition of Ayers Rock Air Services (ARAS). The business would see tremendous growth, peaking at over 300 tourists a day. In addition, the company would delve into evacuation services for hospitals such as Tennant Creek, Alice, and Darwin. They would then gain possession of Chartair, one of the original providers of outback mail runs, which still operates to this day. Skyport would become the first public transit service after taking over the daily "Center-run" operations from Ansett NT, which serviced Darwin, Katherine, Tennant Creek, and Alice Springs daily. Skyport supported the NASA HIGH ALTITUDE Balloon project, both during takeoff, flight and cut-down should it be necessary. CAH helicopters and nomad aircraft aided in the retrieval of the space packages once landed.

Before starting his own Aviation company, Roger took on a brief contract job at the Alice Springs Aeroclub as a licensed engineer. Due to being unable to find the footing he required to launch his own business, he gave serious consideration into leaving the aviation industry entirely and was beginning to look at other walks of life to pursue. However, it was during his time at Alice Springs where he networked with the president of the organization, and due to his sublime work and innovative mind, they shook hands and made a deal, leading to the launch of his own highly successful company.

Following Roger’s return to Australia, he decided to stay there long-term and eventually opening up his own aviation business. Prior to that, he would work as a licensed Aviation Engineer for S.A.A.T.A.S, where he would help test materials and prototypes, investigate parts as well as product failures and damage, and develop innovative new products, parts, and materials for a variety of aircraft. Like his previous roles, he was responsible for dismantling, testing, repairing, and reassembling aircraft engines, assembly of aircraft frames, conducting routine preflight inspections, and general maintenance work.

Roger saw a huge transition from the cold weather as he moved to the Bahamas, where he serviced various aircraft, including the Twin Otters, DC-8, and Grumnan Seaplanes, all of which were targeting Drug Trafficking operations in the southern region. He continued to offer maintenance to the aircraft, which meant the maintenance of and dismantling of airframes, aircraft engines, and other aircraft systems for repair, as well as overhaul, leaning, and reassembly. Additionally, he was assigned to set up a training course that taught indigenous Bahamian natives basic aircraft engineering skills. Roger completed his UK British ARB exams over this period.

Continuing his travels, Roger saw himself working in the Arctic Circle and relocated extensively through the Polar Regions as a “Flying Spanner,” where he supported the Bristow Freighters in supplying the Dew Line bases, settlements, and mines with fuel, food, and supplies. This role's primary function was to accompany aircraft on all flights, handling all the maintenance and engineering duties throughout. This included the repair and overhaul of aircraft structural, mechanical, and hydraulic systems. Roger also completed his Canadian Aircraft License exams while he attained his license.

Upon moving to New Guinea, Roger worked as a Field Engineer, supporting their fixed-wing operations alongside assisting in search and rescue operations. His responsibilities as a Field Engineer involved routine maintenance, conducting site visits, monitoring schedules, preparing contracts, supervising technicians, estimating costs and monitoring expenditures, running field operations, and supporting overall project objectives. It was here that Roger completed his exams and SOE’s to be awarded his Aircraft Engineering License.

During Roger’s time at S.A.A.T.A.S, he worked as an unlicensed aircraft engineer on a single and twin-engine Cessna aircraft fleet. While there, he was required to travel extensively throughout Australia's Northern Territory to support operational aircraft development as per his contract. His duties on the job included conducting inspections, troubleshooting problems, making repairs, making upgrades to aircraft, as well as dismantling, inspecting, testing, repairing, and reassembling aircraft engines. All this while keeping detailed records of all maintenance work being done.

At Airexpress, Roger was part of the engineering team that developed both the Bristow Freighter, a twin-engine aircraft, as well as the Bristow Hercules Engines that was used in the freighter. Both of these units would be utilized by the Australian Army. He and his team would be responsible for working on all stages of the production cycles, from research and design to manufacturing, installation, and evaluation. Additional duties included analyzing problems and deficiencies, developing solutions to resolve them, writing technical documentation for operators, and conducting experiments to improve and further innovate product designs.

Roger began his journey in aviation at the Test Flight Division of De Havilland Aircraft Company as a project developer. He worked on the initial development projects for the Twin Otter, Buffalo Carabu, DHC-6, DHC-8, Turbo Beaver, and even the Space Shuttle Cargo Bay Arm for the NASA Space Shuttle Project. His responsibilities included coordinating the work of support resources, providing day-to-day leadership of projects, reporting activities throughout the project lifecycle, and guiding assistant project managers, analysts, and administrative staff as required.