I teach courses on GNSS at Saint Louis University, including Introduction to GPS (GIS 2010) and Precise Positioning and Applications of GNSS (GIS 4930/5930).

• Editorial Board, IOP Measurement Science and Technology, since 2024 January.

• Session Chair, Institute of Navigation International Technical Meeting (ITM) & Precise Time and Time Interval Meeting (PTTI), 2024 & 2022 & 2019 & 2017.

• Scientific Committee, European Frequency and Time Forum (EFTF), since 2023 September.

• Committee, UCAR’s University Community Programs (UCP) Strategic Planning Project, since 2022.

• Editorial Advisory Board, GPS Solutions, since 2018.

• Panelist, American Institute of Aeronautics and Astronautics (AIAA) Rocky Mountain Annual Technical Symposium, 2023.

• Editor, Special Issue “Timekeeping in Space: Technology, Practice, Promise, and Benefits”, GPS Solutions (Impact Factor: 5.222), 2021-2023.

• General Co-Chair, IEEE GNSS+R Workshop, 2023.

• Committee, National Institute of Standards and Technology (NIST) Physical Measurement Laboratory (PML) Internal Awards Program, 2021.

• Technical Program Committee, IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication (ISPCS), 2017 & 2016.

• Technical Program Committee, IEEE International Frequency Control Symposium, 2016.

• Reviewer for journals such as GPS Solutions, NAVIGATION, IEEE Transactions on Instrumentation and Measurement, Metrologia, IOP Measurement Science and Technology, Remote Sensing, Elsevier, Algorithms, Artificial Satellites, IEEE Industrial Electronics Magazine.

• In 2023, Digital Locations, Inc interviewed me on Positioning, Navigation, and Timing (PNT). Here is the Podcast. It was also reported by Yahoo Finance.

• In 2021, President's FY 2021 Budget Request to Congress -- NIST (Page 20) reported my research on time scales. It says "NIST scientists demonstrated the first next generation ‘time scale’ — a system that incorporates data from multiple atomic clocks to produce a single highly accurate timekeeping signal for distribution.”

• In 2021, NIST news and a LinkedIn blog reported my co-authored paper "A Resilient Architecture for the Realization and Distribution of Coordinated Universal Time to Critical Infrastructure Systems in the United States." This work was also mentioned in 2021 Commerce Accomplishments. It says "NIST recommended steps to boost resilience of U.S. timekeeping."

• In 2021, NPR news, Nature podcast and AAAS news reported my co-authored paper "Frequency ratio measurements at 18-digit accuracy using an optical clock network." 

• In 2019, APS news and NIST news reported my corresponding-authored paper "Demonstration of a time scale based on a stable optical carrier."

• In 2019, ScienceDaily reported my co-authored paper "Towards the optical second: Verifying optical clocks at the SI limit."

• In 2017, phys.org news reported my first-authored paper "Incorporating an Optical Clock into a Time Scale."

• In 2017, Wikipedia on Leap Second mentioned my first-authored paper "The effects of the January 2016 UTC offset anomaly on GPS receivers monitored at NIST." This blog discussed the paper in details.

• In 2016, NIST news and phys.org news reported my co-authored paper "Precision Time Transfer using IEEE 1588 over OTN through a Commercial Optical Telecommunications Network."

• 2023, Trusted Reviewer, IOP Publishing.

• 2019, NIST Distinguished Associate Award, Department of Commerce. Here's the webpage.

• 2018, Outstanding Reviewer Awards, IOP Measurement Science and Technology.

• 2013-2015, Student Representative, IEEE Ultrasonics, Ferroelectrics, and Frequency Control (UFFC) Society.

• 2013, Best Student Paper, 45th Institute of Navigation Precise Time and Time Interval (PTTI) Meeting.

• 2012, Best Student Paper, 44th Institute of Navigation Precise Time and Time Interval (PTTI) Meeting.