Dennison Williams

I led the successful migration of medical records between systems, focusing on ensuring data integrity and a seamless transition for healthcare providers. I developed and maintained robust, secure applications using Python, PHP, Perl, and JavaScript to support critical health initiatives, such as the COVID-19 vaccine program. Additionally, I oversaw large-scale systems administration and database management to optimize performance and reliability. I designed and implemented cutting-edge cloud solutions by leveraging Docker for scalable, custom applications. Furthermore, I applied secure programming practices to protect sensitive data and maintain compliance with industry standards.

My Key Accomplishments

• Saved tens of thousands of dollars by developing custom software solutions and integrating open-source technologies.
• Enhanced public health and safety through creation of mobile-first applications and community engagement tools.
• Contributed to healthcare IT infrastructure with cost-effective tools for occupational safety and health informatics.

Provided development operations and software development support to an open source e-learning platform

• Wrote enhancements to 3rd party modules to improve platform functionality for the organization and the larger open source community.
• Architected and deployed virtual development environment which reduced regression bugs and decreased the time to completion for new issues.

Provided custom secure voice infrastructure, network and systems operation support, and custom software development services to support the growth and distribution of premium cannabis clones.

• Developed, monitored, and supported a secure VoIP network allowing for secure communications for staff and customers via law enforcement resistant network.
• Wrote customer lead tracking software integrating Zoho and public data sources to facilitate the expansion of sales from the bay area to the entire California region.
• Architected, configured, monitored, and proactively responded to issues with all site networks to provide highly available secure access to the internet and organization assets.

Supported systems operations and custom sftware development for a radical web development co-operative.

• Wrote a real time vhost monitoring solution that detected broken deployments switching the organizations response from reactive to proactive and improving the organizations SLA.
• Custom WordPress and Drupal development that provided clients with needed functionality on time and under budget.
• Monitoring infrastructure architecture and management support with custom interfaces to ease on call scheduling for team.

Managed the direction of custom IT solutions as lead developer of a 12 person team

• Built customize-able secure voice conferencing system leveraging Linux, OpenVPN, and Asterisk to create turn key solution ad hoc networks for surveillance resistant communication.
• Led cross platform mobile application development team that provided real time resource mapping apps to customers using Drupal, Swiftriver, Twitter API, Kohana, Ushahidi, and Appcelerator.

Resolved RF bugs and wrote custom firmware to support remotely configureable transmitters for this low power FM fabrication shop.

• Developed transmitter firmware for network interface via a Lantronix Xport that allowed for getting and setting of transmitter settings and status remotely via an on board web server.
• Used Oscilloscope and logic analyzer to verify transmitter quality control and to debug firmware issues at line level voltage.

Systems developer and member of large scal systems administration team of operators for the Radio@AOL streaming service.

• As a team member managed 1200+ host network comprised of Solaris and Linux systems to provide streaming radio service.
• Developed tools to perform network and host security audits, log aggregation analysis, and report generation as needed to verify system integrity.
• Contributed as Oracle database administrator supporting the data store for the entirety of Time Warner’s music archive.

Systems developer for a multi platform software development lab that maximized the autonomy for CS students.

• Architected and managed centralized authentication for a heterogeneous development network based on Linux and OpenLDAP.
• Developed web front end that allowed non-technical staff to manage student access to lab resources.