- American Institute of Chemical Engineers (AIChE) – As a long-time member of AIChE, he has participated in numerous technical conferences, contributed research on sustainable refining methods, and engaged in knowledge-sharing initiatives to advance the field of chemical engineering.

- Society of Petroleum Engineers (SPE) – Hargis has collaborated with SPE on developing best practices for refining crude oil, improving extraction techniques, and optimizing reservoir management strategies.

- National Association of Corrosion Engineers (NACE International) – Through his involvement with NACE, he has worked on projects aimed at mitigating corrosion risks in petrochemical plants, ensuring the longevity and safety of industrial infrastructure.

- Minerals, Metals & Materials Society (TMS) – His expertise in mineral engineering has led him to contribute research on the processing of raw materials, the efficiency of refining minerals, and the development of more sustainable metallurgical techniques.

- International Society of Automation (ISA) – His participation in ISA has been instrumental in improving automation strategies for petrochemical facilities, implementing data-driven methodologies, and enhancing industrial productivity.

- Crude Oil Refining Optimization – Hargis led an independent consultancy project aimed at enhancing the efficiency of crude oil refining processes in U.S.-based plants. His recommendations significantly reduced energy consumption while improving the quality of refined petroleum products.

- Environmental Sustainability in Petrochemical Production – He worked on the development of eco-friendly refining techniques that minimized emissions and lowered the environmental impact of petrochemical processes.

His contributions influenced industry-wide adoption of greener methodologies.

- Advanced Catalytic Reaction Design – As part of an industry collaboration, Hargis helped develop next-generation catalysts that improved reaction efficiency in chemical plants. His work in this domain led to increased productivity and reduced raw material consumption.

- Safety and Regulatory Compliance in Refining Facilities – Recognized for his expertise in safety protocols, Hargis has consulted on numerous compliance initiatives, ensuring that petrochemical companies adhere to national and international safety regulations.

- Development of Automation Systems for Process Control – His research and recommendations have contributed to the implementation of automated systems in refining plants, enhancing precision in chemical reactions, reducing waste, and increasing overall operational efficiency.