Alfred Rossi

The Ohio State University, Columbus, Ohio

Thesis: Temporal Clustering of Finite Metric Spaces and Spectral k-Clustering.

The Ohio State University, Columbus, Ohio

The Ohio State University, Columbus, Ohio

The Ohio State University, Columbus, Ohio

Dept. of Computer Science & Engineering, The Ohio State University

Dept. of Computer Science & Engineering, The Ohio State University

Dept. of Computer Science & Engineering, The Ohio State University

Dept. of Computer Science & Engineering, The Ohio State University

Immuta, Columbus, OH

• Pioneered cutting-edge SQL transformers for the integration of privacy mechanisms. Particularly, for rewriting aggregate queries to ensure differential privacy (US Patent 11,593,506, February 2023), and for achieving local differential privacy through randomized response (US Patent 11,783,077, October 2023).
• Led the architectural design and contributed to the development of a system that infers database column types from column data without requiring explicit transfer. Notably, this locality-preserving system works remotely over a sample, offering PAC-like robustness guarantees.
• Implemented critical cryptographic libraries, such as format-preserving encryption (FF1), order-preserving encryption (Boldyreva, Chenette, Lee, O'Neil), and AES.
• Advanced format-preserving encryption and randomized response techniques to finite regular languages. This was achieved by creating an efficient library to enumerate the accepting set of a regular expression, supporting conversion between an accepted value and its index in constant time for a fixed pattern.
• Developed effective best-effort solutions to hard combinatorial optimization problems such as reducing excess privilege in role-based access policies while simultaneously minimizing the number of replacement roles. (NP-hard to even approximate by reduction to boolean matrix factorization.)
• Conceived and implemented a unique clustering algorithm that leverages minimum capacity constraints for k-anonymization.
• Designed and implemented a novel one-pass streaming algorithm for constructing a k-anonymizing attribute suppression decision tree.
• Conceived, developed, and implemented a framework for differential data risk assessment enabling, e.g., detection of queries that would inadvertently re-identify de-identified data.
• Provided expert consultation to the company on modern best practices in mathematical privacy, including the application of differential privacy, zero-knowledge proofs, partially and fully homomorphic encryption, queries over encrypted data, and secure multi-party computation techniques.
• Authored numerous scholarly papers and guidance materials on the application of Privacy-Enhancing Technologies (PETs).
• Frequently served as an advisor to the UK Information Commissioner's Office (ICO) on the application of PETs, including active participation in the PETs Expert Forum (2021-2022) and PETs Expert Roundtable (September 9, 2019).

VentureTech Group, LLC. Columbus, OH

• Advise company technical direction in accordance with best current practice, specifically in the areas of data model design, disaster recovery, internationalization, operations, scalability, security, software development methodology, system architecture, and user data privacy.
• Establish policies and procedures for compliance, governance, and management of risk, especially in the handling of personal data under the General Data Protection Regulation (GDPR).
• Developed a multi-tenant Learning Management Platform (VueJS, golang, Postgres, Google Cloud Platform, Kubernetes), currently in use by Cooper Tire & Rubber Company.
• Architectural and technical lead on a product (under development) that optimizes vehicle service center resource utilization through smart appointment scheduling.

Alder Analytics, LLC. Columbus, OH

• Developed novel cryptographic services to facilitate digital document signing.
• Architected and developed an internationalized (multi-lingual) Learning Management System (C#, VueJS, ASP.NET MVC, MS SQL Server, Azure) for retailers. Currently in use by Under Armour to train third party sales associates (e.g. retail sales associates at Dick's Sporting Goods, Cabela's, ...) on Under Armour products.
• Helped a top 30 U.S. Bank (by asset size) predict the cost of premiums associated with new account marketing campaigns.
• Provided architectural direction and was sole backend developer (golang, Postgres) of a streaming music application (SavageTrap). App was a five star application in both iOS and Google Play stores, and had supported over 290k registered users at the time of shutdown.
• Guided the transition of a top 250 U.S. website (by traffic) from traditional monolithic application architecture to distributed, containerized microservice architecture enhancing availability and fault-tolerance.
• Developed several high-performance application-specific reverse proxies (golang) responsible for operations such as realtime forensic analysis of web traffic, realtime marketing analytics (Druid, Hadoop, Kafka, Zookeeper), template expansion, and load balancing (among others).
• Migrated traditional web-application infrastructure to containerized Docker-based cluster infrastructure with multihost-networking (Rancher, libnetwork) and automated service discovery (consul, etcd, skydock).
• Implemented transparent distributed high performance real time traffic analysis for advertiser dashboards (golang, druid, zookeeper, kafka).
• Applied best practices from distributed systems to architect highly available applications.
• Developed a business intelligence portal (Java, OSGI) integrating Saiku BI with customer databases for a cloud-based sales management service.
• Automated server provisioning with ansible.

Battelle Memorial Institute, Columbus, OH

• Provided consulting to Battelle, as needed, on a variety of topics in the realms of scientific computing and systems administration.
• Consulted on the technical planning and feasibility analysis for the implementation of the next generation of Battelle's HPC cluster (Galileo).
• Investigated graph layout algorithms for fast visualization of large (approximately 10,000-node) nearly-planar graphs for use in custom software tool for modeling large scale electrical networks.
• Jointly supported a combined Linux / Windows Server environment including VMware ESXi and WebLogic application servers.
• Jointly responsible for administration and support of 30+ node Linux HPC cluster.

Action Verb, LLC. Las Vegas, NV

• Responsible for designing, implementing, monitoring, and maintaining efficient and fault-tolerant infrastructure for highly available web applications.
• Developed custom DAV (milton.io-based), SFTP (apache mina-based), FTP (mina-based) file servers in Java enabling customer access to files stored in BrickFTP (the company's flag-ship product).
• Instrumented code to capture performance data from applications in production, enabling real-time monitoring and analysis.
• Maintainer of Action Verb's heavily modified internal branch of S3FS (a fuse based file system (C++) backed with Amazon's S3 service.)
• Developed drop-in extension libraries enabling hosted applications to interface with Action Verb's deployment platform.
• Automated infrastructure deployment with Chef (Ruby).
• Systems Administrator for 50+ Linux servers (Ubuntu, RHEL) and several MySQL databases. Systems covered included DNS, FTP, SVN, NFS, mail, web, and application servers.
• Worked extensively with Amazon AWS services including EC2, S3, IAM, RDS, and VPC.

Energetic Systems & Security Technology, Battelle Memorial Institute

• Aided in the design of physical test articles and developed computer-vision based analysis software for performing diagnostic evaluation of multi-view, multi-energy transmission x-ray systems.
• Performed mathematical modeling of the system response of CT scanners and statistical analysis of CT images for diagnostic evaluation.
• Developed applications for the visualization of tomographic reconstructions of CT data and image analysis.
• Analyzed the evolving DICOS standard (a data storage and interchange standard for security imaging devices based on the medical data acquisition standard DICOM), and developed DICOS related software tools. Most notably, a configurable rule based validator for DICOS data sets.
• Performed mathematical modeling of general sensor / system response, with an additional focus on heat flux sensors for use in gathering burn injury prediction data.
• Responsible for supporting group efforts which require software development, most notably a software package for the automated post-processing of test data and report generation.
• Jointly responsible for the design, administration, and continued functioning of the group high-performance computing cluster.
• Recipient of 5 outstanding performance awards, and pending nomination for the Emerging Scientist award at time of departure.

Dept. of Computer Science & Engineering, The Ohio State University

Taught Fall 2017, Spring 2018, Fall 2018, Spring 2019, Spring 2020, Fall 2022, and Spring 2023.

• Topics include propositional and first-order logic, basic mathematical proof techniques, graphs, analysis of algorithms, asymptotic analysis, solving recurrence relations, and basic sorting and searching.

Dept. of Computer Science & Engineering, The Ohio State University

• Topics include concentration inequalities, probability theory, formal learning models (including the PAC, mistake-bound, consistency, and agnostic PAC models), VC dimension, formal models of privacy and their use in machine learning.

Dept. of Computer Science & Engineering, The Ohio State University

• Topics include design and analysis of algorithms and data structures, divide-and-conquer, sorting and selection, search trees, hashing, graph algorithms, string matching, probabilistic analysis, randomized algorithms, and NP-completeness.

Dept. of Physics, The Ohio State University

• Taught recitation courses and labs corresponding to calculus-based mechanics (Physics 131 Autumn 2008), and calculus-based electrostatics (Physics 132).

Dept. of Mathematics, The Ohio State University

• Responsible for teaching the recitation course corresponding to Math 150 (Autumn 2007), grading, holding office hours, and working one-on-one to tutor and enhance student's understanding of pre-calculus mathematics.

thatvideogamesite.com

• Developed several websites for the purpose of selling online advertising.
• thatvideogamesite.com (sold 10/2007): Developed flash game site in PHP. Implemented custom caching system for reducing system load under heavy traffic from digg, fark, and addictinggames.com.
• theunverse.net (no longer online): Social link sharing site developed in Ruby on Rails. Developed javascript heavy front-end with script.aculo.us. Profiled extensively to identify and mitigate bottlenecks in ActiveRecord queries.

Condensed Matter Physics Group, Dept. of Physics, The Ohio State University

• Implemented numerous custom software packages including a web based system for submitting molecular dynamics simulation jobs to a supercomputer, and custom visualization software in C++ for displaying and animating the results of such a simulation.
• Evaluated the efficacy of Bezier curves in the modeling of physical potentials.

High Energy Physics Group, Dept. of Physics, The Ohio State University

• Conceived, designed, and implemented a custom software package to help oversee the manufacturing, testing, and shipment of components for the Stanford Linear Accelerator.
• Interfaced custom test equipment with centralized back-end database.