Dr Omairey's current research is centred on three interconnected themes: sustainable and circular pavement materials; ageing, durability, and performance of infrastructure materials; and computational modelling of pavement and construction systems. Through these areas, her work supports the development of low-carbon, resilient, and resource-efficient transport infrastructure while promoting the adoption of innovative materials and technologies within the highway sector.

She joined the School of Computing, Engineering and Digital Technologies at Teesside University in June 2022 as a Lecturer in Civil Engineering and was appointed Course Leader for the MSc Civil and Structural Engineering programme in January 2023. Prior to joining Teesside University, she worked at Leeds Beckett University as a Degree Apprenticeship Assessor in Civil and Building Services Engineering. She obtained her PhD in Highway Engineering from Aston University in 2021 under the supervision of Professor Yuqing Zhang.

Her research contributions include the development of a finite element framework for predicting oxidative ageing in asphalt pavements under multiphysical environmental conditions, the characterisation of anti-ageing modified bitumen using ageing-related kinetics, and the evaluation of recycled waste plastics as sustainable modifiers and partial replacements for conventional bitumen.

Her work has been supported through several competitive funding awards, including the UKRI Knowledge Transfer Partnership (KTP) Award (2026–2029), British Council Transnational Education (TNE) funding (2026–2027), UKRI Regional Innovation Fund – Short Knowledge Transfer (RIFsKT) Award (2024), the Rees Jeffreys Road Fund Research Grant (2022–2023), the Schlumberger Foundation Faculty for the Future Fellowship (2018–2021), and the Newton Fund (UK–China Joint Research and Innovation Partnership Fund) (2018).

Alongside her research activities, Dr Omairey teaches and supports a broad portfolio of civil engineering modules, including Civil Engineering Technology, Site Surveying, Sustainability, Engineering Geology, Enterprising Project Leadership, Engineering Research Project, Geotechnics, Soil Mechanics, and Construction Materials.

She also contributes to Teesside University's transnational education initiatives through annual teaching visits to partner institutions in China, including North China University of Water Resources and Electric Power and Anyang Institute of Technology, where she delivers block teaching on Civil Engineering and Geological Disaster Management programmes.

Dr Omairey is actively involved in supporting Degree Apprenticeship learners through academic mentoring, initial skills assessments, mock End-Point Assessment (EPA) professional discussions, and EPA report reviews. Through these activities, she helps apprentices develop the technical, professional, and reflective competencies required for successful programme completion and progression towards professional registration.

Her publication and research portfolio spans pavement engineering, asphalt ageing and durability, recycled and sustainable construction materials, bitumen science, multiphysics modelling, finite element analysis, and circular economy applications within transport infrastructure. She also serves as a peer reviewer for several international journals in the fields of civil engineering, construction materials, and pavement engineering.