Currently he is the Transmission Line Design Manager, responsible for the Engineering and Design of new or existing Transmission lines as well as Technical Standards and Specifications.  Frank is a member of IEEE, Power Engineering Society, Standards Association, CIGRE and Insulator Conductors Committee (ICC).  Frank was the IEEE-PES-ICC chair from 2016-2017. 
Frank is currently the chair of Subcommittee C, Cable Systems, and has served as chair and vice-chair of several other ICC working and discussion groups.    He is the chairman of CEATI’s Transmission Underground Cable Interest Group as well as a vicechair of EPRI’s Transmission Underground Task Force.  Frank has authored and co-authored several technical papers and presentations pertaining to Transmission Underground Cable Systems. 
Publications
- Frentzas, F. et al. Electrical and physical characterization of a 138 kV XLPE insulated cable with 12 years service life. 10th International Conference on Insulated Power Cables. 2019
- Frentzas, F. Repairing High Pressure Fluid Filled (HPFF) Cable Systems. EUCI Underground Transmission Conference. 2019
- Frentzas, F. et al. HV underground transmission line design for the Burnham Taylor project. IEEE PES T&D Conference and Exposition. 2014
- Frentzas, F. Cable accessories workmanship - US perspective. 8th International Conference on Insulated Power Cables. Jicable. 2011