Callahan Enterprises

Careers

Available Positions

We are continuously seeking qualified, motivated individuals with integrity who want to become part of a growing company with a huge potential to succeed. We value our employees and the role they play in our success. We recognize and reward their achievements and we invest in their training, development, benefits and compensation. We take our work seriously and looking for those who do the same, but who also takes pride in solving complex problems and satisfying our clients. Imagination, Innovation, continuous improvement and creativity are all highly desired.

The majority of our positions are in the IT industry. However, we often have administrative, sales, and clerical positions. Our available positions can also be anywhere in the continental U.S.; therefore, all job descriptions for Current Openings show exact locations. Job Descriptions for On-Going Needs may be for multiple locations.

We invite you to explore our web site to learn more about:

•Our company
•Our people
•Our ethics



Systems Engineer

Job Description

Our growing company is looking for a Systems Engineer to help build out, maintain, and troubleshoot our rapidly expanding infrastructure.  You will be part of a talented team of engineers that demonstrate superb technical competency, delivering mission critical infrastructure and ensuring the highest levels of availability, performance and security. The candidate must have a background in IT, computer systems engineering, or systems engineering and analysis.


Responsibilities


Manage and monitor all installed systems and infrastructure
Install, configure, test and maintain operating systems, application software and system management tools
Proactively ensure the highest levels of systems and infrastructure availability
Monitor and test application performance for potential bottlenecks, identify possible solutions, and work with developers to implement those fixes
Maintain security, backup, and redundancy strategies
Write and maintain custom scripts to increase system efficiency and lower the human intervention time on any tasks
Participate in the design of information and operational support systems
Provide 2nd and 3rd level support
Liaise with vendors and other IT personnel for problem resolution


Requirements


BS/MS degree in Computer Science, Engineering or a related subject
Proven working experience in installing, configuring and troubleshooting UNIX /Linux based environments.
Solid experience in the administration and performance tuning of application stacks (e.g.,Tomcat, JBoss, Apache, Ruby, NGINX)
Solid Cloud experience, preferably in AWS
Experience with virtualization and containerization (e.g., VMware, Virtual Box)
Experience with monitoring systems
Experience with automation software (e.g., Puppet, cfengine, Chef)
Solid scripting skills (e.g., shell scripts, Perl, Ruby, Python)
Solid networking knowledge (OSI network layers, TCP/IP)
Experience with encryption devices and Wide Area Networking (WAN) protocols to include ATM and SONET.
Experience with Infiniband protocol.
CompTIA Security+ CE or equivalent certification.