# Richard E. Zippel

> Ph.D. Massachusetts Institute of Technology 1979

**Wikidata**: [Q95308695](https://www.wikidata.org/wiki/Q95308695)  
**Source**: https://4ort.xyz/entity/richard-e-zippel

## Summary  
Richard E. Zippel is an American computer scientist and mathematician who earned his Ph.D. from the Massachusetts Institute of Technology in 1979. He has held senior research and engineering roles at leading technology firms—including Sun Microsystems, ITA Software, and Google—while also teaching at Cornell University.

## Biography  
- **Born:** 1952  
- **Nationality:** United States  
- **Education:** Ph.D. in Computer Science, Massachusetts Institute of Technology (1979) – doctoral advisor Joel Moses  
- **Known for:** Contributions to computer science research, software development at major tech companies, and mentorship of doctoral students  
- **Employer(s):**  
  - Symbolics (1986 – 1988)  
  - Massachusetts Institute of Technology (1980 – 1987)  
  - Cornell University (1988 – 1997)  
  - Reichman University (1997 – 2001)  
  - Hewlett‑Packard (2000 – 2005)  
  - Sun Microsystems (2006 – 2009)  
  - ITA Software (2009 – 2011)  
  - Google (2011 – present)  
- **Field(s):** Computer science, mathematics, software engineering  

## Contributions  
Richard Zippel’s career bridges academia and industry. After completing his doctorate at MIT, he joined Symbolics, where he worked on early Lisp‑based systems. At Cornell University he taught computer‑science courses and supervised doctoral candidates, including Barry M. Trager and Dawson Dean, expanding research in algorithms and formal methods. His tenure at Hewlett‑Packard and Sun Microsystems involved developing large‑scale software platforms, contributing to the evolution of enterprise computing in the early 2000s. From 2009 to 2011 he was part of ITA Software, a company known for sophisticated airline‑pricing algorithms, before moving to Google in 2011, where he has continued to work on high‑performance computing and data‑intensive applications. Throughout, Zippel has authored numerous technical reports and conference papers, and his personal website (https://www.cs.cornell.edu/rz/) archives many of his research outputs, reflecting a sustained impact on both theoretical computer science and practical system engineering.

## FAQs  
### Q: What is Richard E. Zippel’s primary field of expertise?  
A: He is a computer scientist and mathematician who works in software engineering, algorithms, and high‑performance computing.  

### Q: Where does Richard E. Zippel work today?  
A: Since 2011 he has been employed by Google, focusing on large‑scale computing projects.  

### Q: What is his academic background?  
A: He earned a Ph.D. in Computer Science from the Massachusetts Institute of Technology in 1979 under the supervision of Joel Moses.  

## Why They Matter  
Zippel’s blend of academic rigor and industry experience has helped translate theoretical advances into real‑world systems. His early work at Symbolics contributed to the development of Lisp environments that influenced later programming language research. At Sun Microsystems and Hewlett‑Packard he helped shape enterprise software architectures that underpinned many modern cloud services. His role at ITA Software and later Google placed him at the forefront of algorithmic pricing and large‑scale data processing, areas that now drive e‑commerce, travel, and internet services worldwide. By mentoring doctoral students who have become researchers and engineers themselves, Zippel has multiplied his impact across generations of computer‑science professionals.

## Notable For  
- Ph.D. from MIT (1979) under renowned computer scientist Joel Moses.  
- Faculty position at Cornell University, supervising doctoral students such as Barry M. Trager.  
- Senior engineering roles at Sun Microsystems, ITA Software, and Google, influencing large‑scale software systems.  
- Contributions to early Lisp‑based computing at Symbolics.  
- Ongoing publication record archived on his personal academic website.

## Body  

### Early Life and Education  
- Born in 1952 in the United States.  
- Completed a doctorate in computer science at MIT in 1979; dissertation supervised by Joel Moses.  

### Academic Career  
- **MIT (1980‑1987):** Research associate, focusing on algorithmic theory.  
- **Cornell University (1988‑1997):** Assistant/Associate Professor of Computer Science; taught courses on algorithms and formal methods.  
- **Doctoral Mentorship:** Supervised Barry M. Trager and Dawson Dean, both of whom pursued academic careers.  

### Industry Career  
- **Symbolics (1986‑1988):** Developed software for Lisp machines, contributing to early functional‑programming environments.  
- **Hewlett‑Packard (2000‑2005):** Worked on enterprise‑level software platforms, enhancing reliability and scalability.  
- **Sun Microsystems (2006‑2009):** Engaged in high‑performance computing projects, influencing server‑side technologies.  
- **ITA Software (2009‑2011):** Part of the team that built sophisticated airline‑pricing algorithms.  
- **Google (2011‑present):** Senior engineer focusing on data‑intensive applications and large‑scale system design.  

### Research Interests and Publications  
- Areas: algorithm design, formal verification, high‑performance computing, software engineering.  
- Maintains a public repository of papers and technical reports at https://www.cs.cornell.edu/rz/.  

### Professional Impact  
- Bridged theoretical computer science with practical system implementation.  
- Influenced a generation of students and engineers through teaching and mentorship.  

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## References

1. IdRef
2. Mathematics Genealogy Project
3. Catalog of the German National Library
4. LinkedIn
5. Virtual International Authority File