Atomic physics, a branch of physics whose modern formulation is about a century old has claimed a large number of Nobel Prizes over the last few decades.Despite rapid advancements in research, the development of practical devicesusing quantum effects has only recently taken off with incentives such as theUK Quantum Technology Programme. This programme has spent £120Mfrom 2014 to 2019 into four different ’hubs’: Sensors & Timing, Computing& Simulations, Imaging and Communication. Each hub comprising of a largecollaboration of research groups and industrial partners. This marks a strongtechnological push towards practical and commercial quantum-base devices.The work discussed in this thesis is partially funded by the Sensors & Timing hub with other contributions from EPSRC and DSTL. All three partiesare interested in the advancements of quantum technologies to commerciallevels using atomic physics, a challenge currently limited by the engineeringcomplexity and the sensitivity quantum systems have to their surroundings.It are these two challenges this thesis aims to provide solutions for.Our investigation into the different parts of the interferometer have identifiedtwenty-six enhancements of atom interferometers of different scale. We reportsome on their effectiveness including the testing of composite pulse techniquesadapted from nMRI and proposed characterisation of laser systems usingspeckle-based spectrometers. In particular, we discuss the finalisation of amode-locked laser characterisation for providing a frequency reference to ourexperiments along with proposed modifications to typical set-ups. Progresstowards a new quantum rotation sensor is also reported on along with areview of systematic errors and their origin in atom interferometers.