David H.

David H.

Data Engineer

Canada
Trusted member since 2023
25 years of experience

David has effectively overseen large-scale production environments throughout his career, implemented robust disaster recovery solutions, and automated critical processes.

David's proficiency extends to performance tuning, data management, and database health monitoring, leveraging tools like DataDog, Nagios, and Munin.

He also possesses expertise in scripting and programming languages such as Bash, PHP, and SQL and has a proven track record of leading teams and delivering projects on schedule.

With his solid technical knowledge and strategic problem-solving abilities, David is a valuable asset to any organization.

Main expertise

Data EngineeringData Engineering15 years
SQLSQL21 years
PHPPHP20 years
Team LeadingTeam Leading15 years
7+

Experience9

LexisNexis Risk Solutions

Database Administrator

LexisNexis Risk Solutions
Insurance
Dec 2023 · 2y 10m
  • Managed and maintained critical database systems on a contract basis.
  • Ensured high availability, performed performance tuning, and maintained database security.
  • Monitored database health, executed backups, and supported disaster recovery processes.
  • Collaborated with cross-functional teams to optimize data workflows and support business operations.
MySQLMySQL
SQLSQL
OracleOracle
ETLETL

Data Engineer

Pason Systems Inc.
Apr 2010 · 16y 6m
  • Managing MySQL Percona production servers in a 26TB replicated environment for drilling data, encompassing thousands of databases (with millions of tables).
  • Automating balancing a sharded database system, transferring heavily used databases to nodes with lighter volumes, and archiving older data (over 200 databases daily).
  • Ensuring the high availability of databases through ProxySQL and Orchestrator.
  • Establishing geographically dispersed database instances for disaster recovery.
  • Conducting monthly tests for recovery point and recovery time objectives using Terraform.
  • Utilizing DataDog for alerts, monitoring database health, analyzing query performance, and managing automated jobs.

Senior Database Administrator (MySQL)

Pason Systems Inc.
Energy and Utilities
Apr 2010 - Dec 2023 · 13y 8m
  • Managed MySQL Percona production servers in a 26TB replicated environment for drilling data, encompassing thousands of databases and millions of tables.
  • Automated the balancing of a sharded database system by redistributing heavily used databases to lower-volume nodes and archiving older data, processing over 200 databases daily.
  • Ensured high availability of databases through the implementation of ProxySQL and Orchestrator.
  • Established geographically distributed database instances to support disaster recovery and business continuity.
  • Conducted monthly testing of recovery point and recovery time objectives using Terraform.
  • Utilized DataDog for alerting, database health monitoring, query performance analysis, and automated job management.
MySQLMySQL
TerraformTerraform
InfluxDBInfluxDB
DataDogDataDog
ELT
3+

Data Engineer

Echostar Technologies
Aug 2008 - Mar 2010 · 1y 7m
  • Managing 5 MySQL production servers in a 10-terabyte replicated environment, recording set-top box health data, which grows at 14 to 17 gigabytes daily.
  • Creating a database alert system to monitor database and server health, master/slave balance, data integrity, benchmarking, and profiling.
  • Creating and approving database, table, and query structures for embedded SQLite systems used in millions of set-top boxes.
  • Overseeing and assisting with all other MySQL instances used in different departments.
  • Creating and teaching SQL courses for employees who interface with SQL.

Database Administrator

Echostar Technologies
Telecommunications
Aug 2008 - Mar 2010 · 1y 7m
  • Managed five MySQL production servers in a 10TB replicated environment recording set-top box health data, with daily growth of 14–17GB.
  • Maintained and updated the data warehouse; modeled and designed new tables in production; optimized existing tables to meet reporting needs and improve performance (up to 30× faster in some cases).
  • Created a comprehensive database alert system to monitor server health, master/slave balance, data integrity, benchmarking, and profiling.
  • Designed and approved database, table, and query structures on embedded SQLite systems deployed in millions of set-top boxes.
  • Oversaw and supported all MySQL instances used across various departments.
  • Developed and delivered SQL training courses for employees interacting with databases.
MySQLMySQL
OracleOracle
SQLiteSQLite
ETLETL
SubscriberBASE

Data Engineer

SubscriberBASE
Jun 2007 - Jul 2008 · 1y 1m
  • Managed 11 MySQL servers, which included 7 secondary servers in a replicated environment for an online media company.
  • Utilized Nagios, Munin, Trac, and MySQL proxy for performance monitoring, data management, server tuning, load balancing, backup and recovery, user profiles, and project management.
  • Developed a database panel to monitor database and server health, perform benchmarking, and conduct profiling.
  • Completed a LAMP-based data warehouse application with a report builder and fully automated ETL processes.
SubscriberBASE

Database Administrator

SubscriberBASE
Telecommunications
Jun 2007 - Jul 2008 · 1y 1m
  • Managed 11 MySQL servers, including 7 secondary servers in a replicated environment for an online media company.
  • Utilized Nagios, Munin, Trac, and MySQL Proxy for performance monitoring, data management, server tuning, load balancing, backup and recovery, user management, and project oversight.
  • Developed numerous automated data management scripts using Bash and PHP.
  • Modified server configurations to boost performance for business units and streamline data management.
  • Created a database panel to monitor server and database health, benchmarking, and profiling.
  • Built a LAMP-based data warehouse application with a report builder and fully automated ETL processes.
PHPPHP
MySQLMySQL
BashBash
ETLETL
Excel Telecom

Database Administrator

Excel Telecom
Internet of Things (IoT)
Jun 2006 - May 2007 · 11m
  • Administered MySQL, Oracle, SQL Server, and Sybase databases in an 8TB environment.
  • Conducted performance benchmarking and tuned MySQL to improve system performance.
  • Resolved issues related to I/O contention, file operations, memory management, and stored procedures.
  • Played a key role in migrating data from multiple Oracle and Sybase instances to a MySQL replication setup handling millions of daily transactions.
  • Developed numerous stored procedures and automated scripts in Bash and PHP for database monitoring, data management, user management, backup and recovery, and ensuring 24/7 availability.
PHPPHP
MySQLMySQL
SQLSQL
OracleOracle
BashBash
PL/SQLPL/SQL

SQL Database Administrator / Programmer

FilmStew
Entertainment and Media
Mar 2000 - May 2006 · 6y 2m
  • Managed a small programming team, editorial team, data entry team, and contracted graphic designers to support FilmStew.com operations.
  • Administered SQL Server and MySQL databases, handling creation, normalization, optimization, warehousing, security and encryption, backup and recovery, tuning, and activity monitoring.
  • Developed the website using storyboards, translating requirements into tasks, performing QA/testing, and managing programming projects.
  • Utilized PHP, Classic ASP, JavaScript, XML, AJAX, and HTML for web development.
  • Built a content management system and accountability reporting tools for data entry processes.
  • Oversaw daily email, networking, internal and web security, and server management.
PHPPHP
MySQLMySQL
JavaScriptJavaScript
HTMLHTML
SQLSQL
2+

Engineering excellence

All Data Engineers who have applied to Proxify are scored from 0 to 300 on engineering excellence, one of the five parameters we evaluate. This score reflects engineering excellence only, based on interviews, take-home assignments, live coding sessions, and/or on-the-job performance reviews. The curve shows how all evaluated Data Engineers are distributed across that range, where our acceptance threshold for this parameter sits, and where David stands.

050100150200250300Engineering excellence scoreShare of engineersmedianmeanProxifyacceptancethreshold
David
Score 209 · Top 5% of engineers

Education

University of Calgary
University of Calgary
BA1989 - 1992

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