Matthew Promenchenkel
Ann Arbor,MI
Summary
Accomplished Senior IT Engineer with a proven track record at Merit Network, specializing in Linux server administration and IT infrastructure configuration. Expert in implementing security measures and automating server functions, demonstrating strong problem-solving skills and a commitment to excellence. Skilled in fostering team collaboration and enhancing system reliability and security.
Overview
17
17
years of professional experience
Work History
Senior IT Engineer
Merit Network
Ann Arbor, MI
08.2019 - Current
- Implemented security measures for public-facing resources, including geo IP blocking, fail2ban with iptables rate limiting, and Duo Unix for two-factor authentication
- Developed and improved puppet code for automating internal server functions, ensuring smooth and reliable operations
- Wrote custom Nagios monitoring checks to test systems stats as well as transactional checks
- Created VMware templates for new Linux OS deployments
- Managed local DNS and Cloudflare configurations to maintain reliable and secure web services
- Configured Single Sign-On (SSO) to streamline user authentication processes for internal and cloud hosted services
- Designed custom workflows and processes for Jira queues and customer portals for teams across the company
- Coordinated the migration of self hosted Atlassian applications to the cloud (Jira, Confluence, Bitbucket, Hipchat)
- Designed and implemented the IT infrastructure to host radb.net and whois.radb.net - handling a huge volume of daily traffic
- Employed Git for version control and patch management, integrating with Puppet for automated configuration file deployment
- Configured SPF, DKIM, and DMARC records for email domain authentication, reducing spam and phishing risks
- Maintained notes for projects and processes ensuring clear documentation and collaboration
- Utilized HAProxy with Let's Encrypt for load balancing, high availability (keepalived) and secure communications
- Scripted google account provisioning and managing processes with GAM
- Planned for regular maintenance and patching of hosted applications as well as quarterly operating system patching
- Participated in an on-call rotation, providing timely support and resolution for critical issues
- Tracked security and access issues with Palo Alto firewalls
Systems Analyst - Intermediate
Merit Network
Ann Arbor, MI
09.2012 - 08.2019
- Built and supported a reliable hosted email service with dozens of servers for large and small customers
- Worked with customers to plan and perform the migration of their self hosted email systems to MeritMail
- Configured and tuned Cisco IronPort email filtering appliance for mail routing and delivery
- Managed load balancing and SSL certificate deployments with F5 load balancers
- Built Linux servers to host postfix MTAs with simple reputation blocking and anti spam filtering
- Standardized the deployment of Sympa distribution list management software for new customers
- Coordinated and documented processes for our customers to migrate to Google or Office 365 in the year leading up to the end of the MeritMail service
- Planned and performed the migration of merit.edu email, calendaring and groups to Google Workspace from Zimbra Collaboration Suite
Desktop Support Specialist
Merit Network
Ann Arbor, MI
10.2009 - 09.2012
- Provided tier 1 support for Merit's hosted email service and RADb
- Worked with the NOC on other tier 1 networking issues
- Used Zenoss for system monitoring
Desktop Support Specialist
UofM ITCS
Ann Arbor, MI
08.2008 - 10.2009
- Performed Apple and Dell certified hardware repairs
- Provided OS reinstall, Virus removal, backups, and other end user troubleshooting tasks
- Mentored and trained part time student employees
- Consulted customers on new computer and hardware purchases
Education
BA - Telecommunications
Michigan State University
12.2007
Skills
- Linux server administration - Ubuntu
- IT infrastructure configuration - Puppet
- Monitoring Systems - Nagios
- Command Line Proficiency – Bash
- Reverse Proxy Management - HAProxy
- SSL Certificate Management - letsencrypt
- Virtualization technologies - VMware
- Web Protocol Expertise
- Application support
- Server maintenance
- Email Delivery Optimization
- DMARC DKIM SPF Implementation
- LDAP Administration
- SSO Implementation Experience
References
References available upon request.
Timeline
Senior IT Engineer
Merit Network
08.2019 - Current
Systems Analyst - Intermediate
Merit Network
09.2012 - 08.2019
Desktop Support Specialist
Merit Network
10.2009 - 09.2012
Desktop Support Specialist
UofM ITCS
08.2008 - 10.2009
BA - Telecommunications
Michigan State University
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