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Expert’s research for her MSc and PhD focused on the persitant pollutant, tributyltin (TBT), a once popular biocide in antifouling paint. She has
studied the fate of TBT in both temperate and tropical environments. For her Msc. she determined the environmental fate of TBT in areas with high boating
activity such as boat yards, marinas, harbours etc. as well as reference sites. This was achieved by determining the environmental concentrations of TBT in
turtle grass, sand and seawater samples. For her PhD, she used mussels (Mytilus edulis) as sentential organisms as indicators of TBT pollution in three
Atlantic Harbours, and also used dogwhelks (Nucell lapillus) and queen conch (Strombus gigas) as bioindicators of TBT pollution since well over 260 species
of gonochoristic female gastropods are known to grow penis and/or vas deferens once exposed to TBT. Findings from data collected during her PhD. have
been published in peer review journals. In addition, after studying TBT for more than 10 years, Dr. Titley-O’Neal along with two of advisors from the University
of New Brunswick (Saint John) have published a review article about the masculinization of female gastropods in the Journal of Environmental Monitoring.

Team leader and lead author for environmental impact assessment for the expansion of the BVI Cruise Pier and Visitor's Centre in 2012.Completed limited environmental impact assessment for a client in Blunder Bay, Virgin Gorda which was approved in December 2012.