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Monmouth University
June 1998 - Present
Associate Professor

AT&T Bell Labs/AT&T Laboratories
November 1991 - August 1999
Senior Technical Staff Member

Brookdale Community College
January 1998 - May 1998
Adjunct Professor

Knowledge Systems Concepts, Inc.
March 1987 - April 1991
Senior Scientist

State University of New York at Marcy
January 1989 - May 1990
Adjunct Professor

LTV, Inc.
March 1983 - March 1987
Associate Research Scientist



Dr. Tepfenhart's experience ranges across a broad spectrum of activities. He has performed in the role of instructor, researcher, software developer, and author. Trained as a physicist, his areas of expertise include object-oriented software development, artificial intelligence, and software engineering. His knowledge of modeling physical systems has formed the basis for major contributions in the area of software development. He has been active in the area of OOA/OOD for several large systems. His expertise in this area has been documented in a book titled, UML and C++ A Practical Guide To Object Oriented Development.

Dr. Tepfenhart's industrial responsibilities have included: preparation of research proposals, system engineering, program development, project management, architect, and basic research. As an active member of the research community, he served as Program Chair for the Second International Conference on Conceptual Structures held in Maryland in 1994. He served as the Program Chair for the Sixth International Conference On Conceptual Structures held in Virginia in 1999.

Throughout his career, Dr. Tepfenhart has taken the training of less experienced personnel very seriously. This is demonstrated by the adjunct positions he has held at SUNY, Brookdale, the courses taught inside AT&T, and having mentored students internship programs every year that he has worked in industry.


August 98 – Present: In August 1998, Dr. Tepfenhart took a leave of absence from AT&T to teach at Monmouth University as part of his role at AT&T as a certified recruiter. This leave became permanent in August 1999 with Dr. Tepfenhart joining the Monmouth Faculty. He teaches basic computer science material (data base systems, C++ program development, and object-oriented analysis and design) and software engineering material (mathematical methods and networked computing). He has overseen eight students writing their Masters Theses. He serves as Program Director for the Software Engineering Department.

Nov 94 - August 99: Dr. Tepfenhart served as a technologist in the Operations Technology Center. As a technologist he was charged with identifying software technologies that can create a more reliable long distance network. As a member of the process team, he was instrumental in defining the software development process followed by 1500 developers. As a member of the architecture review board, he has helped set architectural standards followed by 230 projects. As a member of the AT&T foundation architecture team, he has helped establish the strategic direction of object oriented development within AT&T. As team leader in object re-use, he has developed the foundations for a re-use strategy, developed the process, provided the supporting infrastructure, and identified the major content of a repository. In addition, he helped implement a compiler for r++ - a programming language derived from c++ with the inclusion of rules for declarative knowledge.

Nov 91 - Nov 94: Dr. Tepfenhart redesigned and re-implemented the Expert Sectionalization Test System (ESTS). ESTS was an expert system that autonomously identified and localized discontinuities in the long distance telephone network. In addition, he was instrumental in extending this capability in a second system, Automatic Nodal Testing (ANT), to other long distance telephone services, such as the 1-800 portion of the network, with the added functionality for tasking by user command.

Dec 90 - April 91: Dr. Tepfenhart examined the potential use of Probabilistic Causal Modeling (PCM) techniques for Rome Laboratory (formerly Rome Air Development Center) effort, CIWB. Dr. Tepfenhart implemented a PCM based system used in an indications and warnings problem domain. In addition, Dr. Tepfenhart oversaw the design and implementation of a message analysis user interface for completing update vectors as required by I&W knowledge based systems.

June 89 - Dec 90: Dr. Tepfenhart was Principle Investigator for a Rome Laboratory effort, Language Analysis Domain Independent Exploitation Shell (LADIES). In this effort, Dr. Tepfenhart developed the methodologies for evaluating the performance of natural language understanding systems. In addition, he envisioned, designed, and oversaw the development of the LADIES prototype. The LADIES prototype solved a very pressing customer need, namely a software system that functions as a testbed environment for evaluating natural language systems; development environment for constructing message understanding programs at an engineering site; and delivery environment for installation of operational programs in the field. The LADIES prototype provides the ability to interface Automated Message Handling Systems or other message sources with data intensive applications without recourse to programming.

June 89 - Sept 90: Dr. Tepfenhart was Principle Investigator for a Rome Laboratory effort, Expert On Line Evaluation System. In this effort, Dr. Tepfenhart developed an expert system to evaluate the performance of sensor fusion and correlation algorithms in an advanced testbed environment. Performance issues which this system addressed include functional and execution issues. The functional issues included validity of the algorithm, accuracy of results, sensitivity to inputs, and recommendations for parameter tuning to enhance the functional performance. The execution issues included system resources required, speed, and recommendations for parameter tuning to enhance the execution performance.

April 88 - June 89: Dr. Tepfenhart was Principle Investigator in two efforts concerned with the evaluation of expert system technology. In the first effort, OPUS C2 Application and Evaluation Study, Dr. Tepfenhart developed the framework and methods for evaluating expert system tools in the context of information processing applications. His efforts resulted in 1) a characterization of typical information processing needs, 2) formalization of problems solving approaches employed in expert systems, 3) methods for evaluating the knowledge base of expert systems, 4) a suite of benchmark software representative of information processing needs, and 5) an assessment of the validity and suitability of these benchmarks for expert system tool test and evaluation. In the second effort, Multi-Spectral Signal Processor Sizing Study, Dr. Tepfenhart assessed the suitability of employing advanced expert systems to perform signal processing in an air based sensor platform. This study focused on employing expert systems to manage sensors, interpret sensor outputs, and perform situation assessment. The result of this effort was an estimate of the processor size and throughput required.

March 1987 - March 1988: Dr. Tepfenhart was a Technical Leader for a Rome Laboratory effort, Data Architecture Concepts for Knowledge Based Systems (DKBS). Dr. Tepfenhart lead the development of an architecture for an integrated knowledge/data system capable of supporting multiple users, reasoning over data captured in a data base, and learning from experience. This effort required the development of an advanced data/information model called the Situation Data Model to provide consistency checking and operations consistent with data base management systems. In addition, the foundation for a new theory describing reasoning by analogy was laid and is currently being extended.

June 1986 - March 1987: Dr. Tepfenhart was the Principle Investigator on an IR&D program at LTV, Inc. to develop an expert system named CASSANDRA for controlling the process by which Carbon-Carbon composites are produced. The program he developed included the capabilities for reasoning about sensor outputs, material process states, and pro-active control. Pro-active control was achieved by inferring material properties from the current material process state, predicting the future evolution of the process on the basis of mathematical equations describing the process, diagnosing if future process states would result in diminished product quality, and prescribing alterations in the process to avoid critical process states. Key contributions of this program were: sensor interpretation techniques, integration of numeric and symbolic processing, and reasoning about physical phenomena.

January 1986 - June 1986: Dr. Tepfenhart was the Principle Investigator on an IR&D program at LTV, Inc. to develop an expert system known as the Optical Materials Expert System (OMES). OMES was developed to select optical materials for use in thin-film multi-layer optics. The program he developed included the capabilities for reasoning about the environment, material interactions, and structural factors constraining selection of materials. Key contributions of this program were: models for the environment, integration of numeric and symbolic processing, and integration of a materials data base with an expert system.


Doctor Of Philosophy in Physics awarded by the University of Texas at Dallas in May 1987 upon the completion of his dissertation entitled, A Semiclassical Method for Inversion of Spectral Lineshapes: Application to Radiative Collisions.

Master of Science in Physics was awarded by the University of Texas at Dallas in December 1981 on completion of the required course of studies and research at the Institute of Atomic and Nuclear Physics in Magurelle Romania under a National Science Foundation grant.

Bachelor of Science in Physics was awarded by the University of Texas at Dallas in May 1979.

Associate in Arts and Sciences was awarded by Richland College in August 1977.


Co-winner of the 1977 Texas A&I Mathematics Competition.

Listed in Who's Who In The East, 1996-1997.

Listed in Who's Who In The World, 1997-1998.


Member Sigma Xi, Dallas Chapter.

Member, American Association For The Advancement Of Science.