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John Onofrey Email & Phone Number

DevSecOps Engineer at TSYS
Location: Denver Metropolitan Area, United States 11 work roles 1 school
1 work email found @tsys.com 4 phones found area 303 and 949 LinkedIn matched
✓ Verified July 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 4 phones

Work email j****@tsys.com
Direct phone (303) ***-****
LinkedIn Profile matched
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Current company
Role
DevSecOps Engineer
Location
Denver Metropolitan Area, United States
Company size

Who is John Onofrey? Overview

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Quick answer

John Onofrey is listed as DevSecOps Engineer at TSYS, a with 10 employees, based in Denver Metropolitan Area, United States. AeroLeads shows a work email signal at tsys.com, phone signal with area code 303, 949, and a matched LinkedIn profile for John Onofrey.

John Onofrey previously worked as Sr. DevSecOps Engineer at Gaia Inc. and Sr. AWS Cloud Operations Engineer / DevOps Engineer at Gaia Inc.. John Onofrey holds Bachelor Of Science (B.S.), Computer Science And Engineering / Minor, Applied Mathmatics from University Of Colorado Denver.

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Email format at TSYS

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{first_initial}{last}@tsys.com
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Profile bio

About John Onofrey

Throughout my career, I have had the opportunity to identify how development impacts larger business goals and bottom line success. An active company evangelist for continuous integration and a strong DevOps foundation, I can facilitate the collaboration between disparate teams to effectively solve your customer’s problems.Engineer with over 20 years of experience contributing to the success of mission-critical IT and development operations. My experience will accelerate troubleshooting of critical software systems and operations failures in order to ensure strong customer satisfaction with your company’s products. A systematic, proven approach to identifying and solving problems allows me to effectively:☑ Identify a core issue☑ Troubleshoot issues across the entire stack: hardware, software, application and network☑ Provide an expert analysis of the problem☑ Distill complex problems into consumable information and communicate across company departments and divisions☑ Manage resolution of complex problems arising in the infrastructure environment☑ Interact with software engineering and other company stakeholders to mitigate problems to find   the best solutionAs a strong, collaborative and self motivated team player, I can add value to any organization where software is integral to the success of the business by helping to minimize the “finger pointing” among IT teams concerning the source of application performance problems and serve as catalyst for successful application deployments.● Design, build, deployment and operation of security-focused AWS infrastructure● Identity and Access Control. Define and manage user identity, access policies and entitlements● Logging, Monitoring, Threat Detection, and Analytics● Vulnerability and Configuration Analysis● Cost optimization through Intelligent Procurement and Cloud & Container optimization; Infrastructure optimization that benefits both Finance and Engineering● Experience with IT compliance and risk management requirements● Analytics and Performance Reporting● Experience facilitating discussions with senior leadership regarding technical / architectural   trade-offs, best practices, and risk mitigation

Listed skills include Unix, Troubleshooting, Linux, Solaris, and 28 others.

Current workplace

John Onofrey's current company

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TSYS
Tsys
DevSecOps Engineer
Columbus
Website
Employees
10
AeroLeads page
11 roles · 21 years

John Onofrey work experience

A career timeline built from the work history available for this profile.

Devsecops Engineer

Current

Columbus, Ga, Us

Sep 2021 - Present

Sr. Devsecops Engineer

Louisville, Co, Us

Mar 2021 - Oct 2021

Sr. Aws Cloud Operations Engineer / Devops Engineer

Louisville, Co, Us

AWS Cloud Operations Engineer with over 5 years experience with AWS. I enable Software Engineers to build and manage the AWS services they require to support their development needs while maintaining security and monitoring cost.● Design, build, deployment and operation of security-focused AWS infrastructure.● Logging, Monitoring, Threat Detection, and Analytics. Centralized logging, reporting, and analysis of logs to provide visibility and security insights.● Identity and Access Control. Define and manage user identity, access policies and entitlements.● Vulnerability and Configuration Analysis.● Cost optimization through Intelligent Procurement and Cloud & Container optimization; Infrastructure optimization that benefits both Finance and Engineering.● Infrastructure as Code with Terraform Cloud.● Container Orchestration with Amazon ECS.

Jan 2017 - Mar 2021

Aws Cloud Operations Engineer

In charge of building, deploying and managing the AWS cloud infrastructure for the StealthConnect surgical planning software. Provided input in determining overall cost for hosting the application in the AWS Cloud platform by estimating growth patterns, storage and bandwidth costs, SLAs, backup, and disaster recovery.● AWS Cloud deployment including OpenSwan VPN, CheckPoint firewalls, CloudHSM, Gemalto KeySecure Key Management, Gemalto ProtectV EBS Encryption, AWS EC2 instances● Design and build of core infrastructure● Automated deployments with CloudFormation● Server configuration management with Puppet● EBS volume encryption using CloudHSM, KeySecure, and ProtectV● CheckPoint firewall cloud deployment on configuration● CloudWatch dashboards and custom metrics● Python script used to automate start and stop of development and testing servers during off peak hours to lower costs. ● Python script created to audit AWS Security Groups and determine if rules were no longer needed.● Amazon AWS services (VPC, EC2, EBS, AIM, CloudFormation, CloudWatch, Route53, ELB, S3)

Sep 2015 - Jan 2017

System Administrator

Longmont, Colorado, Us

Use of Fault and Application Performance Monitoring tools to assist Operations and Software Engineering in quickly identifying issues by providing empirical data and removing the guesswork from troubleshooting complex problems. Provide Software Engineering with production performance information including End User Experience, Network Performance, and Application Performance. Provide both Operations and Software Engineering with fixes, remediation, and corrective action. Responsible for the entire day-to-day administration of assigned platform, including troubleshooting and resolving problems as they arise; develop plans and processes designed to improve long-term capabilities of system; ensure platform or system is operating correctly at all times without over-utilizing resources and is recognizing connections with other applicable machines on the network; develop new tools and procedures aimed at making platformmaintenance more effective and efficient, identifying processes that can be automated.● Lead efforts to improve end user response time by analyzing different application layers.● Analysis of TCP traffic determined TCP performance problems were caused by the interaction of Nagle’s Algorithm and Delayed ACK and were causing significant delays in delivering SQL data.● Analysis of HTTP traffic determined that delay in web page delivery due to Javascript not being cached.● Analysis of Java application traces to determine source of delays in web page response times.● Analysis of TCP traffic to determine performance of Tandem Non-Stop SQL Database.● Provide recommendations to development teams based on performance analysis.● System performance reports used to benchmark JBoss AS7 application and system performance.● Automated delivery of system performance reports using Powershell.● Created HP Operations Manager performance and transaction reports using Bash and Oracle SQL Plus.● Amazon AWS services (EC2, S3, VPC, EBS, Route53, ELB, AIM, RDS)

2012 - Sep 2015

Web Application Systems Administrator

Longmont, Colorado, Us

Responsible for a variety of functions associated with maximizing system performance and reducing un-schedule maintenance; analyzes, monitors and establishes procedures for simple applications and the operation of platforms; work collaboratively with the development team to install and upgrade systems to support the company; review in thesoftware requirements and design processes ensure they are applicable to the companies current objectives● Implemented Riverbed APM solutions (AppResponse Xpert, AppInternals Xpert, AppTransaction Xpert)● Performance analysis and tuning of Java VM used in JBoss applications.● Analysis of physical database connection along with JBoss JMX connection count to determine cause of JBoss Application crashes.● Monitor and collect data using Bash scripts.● JBoss JVM analysis and tuning for better application performance.

2010 - 2012 ~2 yrs

Mobility Application Systems Administrator

Longmont, Colorado, Us

Provide 24x7 on-call support for 9-1-1 Wireless applications and systems across multiple platforms including Sun Solaris, Linux Red Hat, HPUX and Tru64 UNIX. Perform troubleshooting of applications that were developed in a variety of languages including C, Java, PHP, ksh, bash, and Perl. Perform troubleshooting of applications that interact with back-end Oracle and MySQL databases. Responsibilities also included resolving trouble tickets, and technical writing of department SOP’s.● Numerous Bash and Oracle SQL Plus scripts written to create and deliver custom transaction reports.

2008 - 2010 ~2 yrs

Voip Application Systems Administrator

Longmont, Colorado, Us

Provide 24x7 on-call support for 9-1-1 VoIP applications and systems across multiple platforms including Sun Solaris, Linux Red Hat, HPUX and Tru64 UNIX. Perform troubleshooting of applications that were developed in a variety of languages including C, Java, PHP, ksh, bash, and Perl. Perform troubleshooting of applications that interact with back-end Oracle and MySQL databases. Responsibilities also included resolving trouble tickets, and technical writing of department SOP’s.● Created a web front-end that graphically displayed customer transaction counts.● Created a monitoring and alerting script to notify about production data changes.● Created a log conversion script to format logs, including epoch times, into a readable format.● Creation of multiple perl dbi scripts to create and deliver custom transaction reports.● Network analysis and troubleshooting of XML web services.

2006 - 2008 ~2 yrs

Wireline Application Systems Administrator

Longmont, Colorado, Us

Provide 24x7 on-call support for 9-1-1 Wireline applications and systems across multiple platforms including Sun Solaris, Linux Red Hat, HPUX and Tru64 UNIX. Perform troubleshooting of applications that were developed in a variety of languages including C, Java, PHP, ksh, bash, and Perl. Perform troubleshooting of applications that interact with back-end Oracle and MySQL databases. Responsibilities also included resolving trouble tickets, and technical writing of department SOP’s.● Created a Log File Management application that transfers, prepares, and loads data to a Data Warehouse.

Dec 2005 - 2006

Incident Administrator

Longmont, Colorado, Us

Provided administrative support for issues requiring escalation. Provided internal communication on the nature of events and incidents and status of their resolutions. Provided internal detailed reports on escalated incidents and events. Coordinated events with internal business units. Assisted in post mortem analysis and root cause investigations. Reworked and wrote departmental procedures. Compiled and maintained metrics for the department.

Apr 2003 - Dec 2005

Quality Control (Qc) Data Administrator

Hauser Contract Research Organization

System Administrator for the Waters Empower High Performance Liquid Chromatography (HPLC) Network; responsible for installation, upgrades, enrolling users, maintaining system security, ensuring compliance with Code Federal Regulations (CFR) 21 Part 11 regulations, maintaining and optimizing the performance of the system, planning for the backup and recovery of data, maintaining archived data on CD, backing up and restoring data, and contacting Waters Corporation for technical support. Archived data from standalone workstations in preparation for network installation. Assignments included the technical writing of qualifications, configurations, security, and general Waters Empower application user SOPs. Structured and tracked QA project activity for billing purposes. Performed and completed all documentation for accountable systems. General clean up and backup data to ensure integrity.

Jun 2002 - Apr 2003
Team & coworkers

Colleagues at TSYS

Other employees you can reach at tsys.com. View company contacts for 10 employees →

1 education record

John Onofrey education

  • University Of Colorado Denver
    University Of Colorado Denver
    Applied Mathmatics
FAQ

Frequently asked questions about John Onofrey

Quick answers generated from the profile data available on this page.

What company does John Onofrey work for?

John Onofrey works for TSYS.

What is John Onofrey's role at TSYS?

John Onofrey is listed as DevSecOps Engineer at TSYS.

What is John Onofrey's email address?

AeroLeads has found 1 work email signal at @tsys.com for John Onofrey at TSYS.

What is John Onofrey's phone number?

AeroLeads has found 4 phone signal(s) with area code 303, 949 for John Onofrey at TSYS.

Where is John Onofrey based?

John Onofrey is based in Denver Metropolitan Area, United States while working with TSYS.

What companies has John Onofrey worked for?

John Onofrey has worked for Tsys, Gaia Inc., Medtronic St Neurosurgery, Intrado, and Hauser Contract Research Organization.

Who are John Onofrey's colleagues at TSYS?

John Onofrey's colleagues at TSYS include Tony Hagler, Anil Kumar, Shweta Priyadarshani, Virginia Whitt Martinez, and Cassandra Day.

How can I contact John Onofrey?

You can use AeroLeads to view verified contact signals for John Onofrey at TSYS, including work email, phone, and LinkedIn data when available.

What schools did John Onofrey attend?

John Onofrey holds Bachelor Of Science (B.S.), Computer Science And Engineering / Minor, Applied Mathmatics from University Of Colorado Denver.

What skills is John Onofrey known for?

John Onofrey is listed with skills including Unix, Troubleshooting, Linux, Solaris, Amazon Web Services, Hp Openview, Voip, and Integration.

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