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About ARSIEM Corporation

At ARSIEM Corporation we are committed to fostering a proven and trusted partnership with our government clients. We provide support to multiple agencies across the United States Government. ARSIEM has an experienced workforce of qualified professionals committed to providing the best possible support.

As demand increases, ARSIEM continues to provide reliable and cutting-edge technical solutions at the best value to our clients. That means a career packed with opportunities to grow and the ability to have an impact on every client you work with.

ARSIEM is looking for a Network Engineer to support Cyber Security Defensive Operations with configuration of Cyber Range consisting of 10s to 100s of VMs, physical and virtual network devices, and firewalls utilizing Infrastructure as Code (IaC), Terraform, Ansible, VMWare and other automation technologies. You will work closely with Hunt, Red and Blue Team operators to understand their desired configurations for the Cyber Security Range to support training, force on force exercises, and mimicking of customer infrastructures. You will work with a team of other Software Engineers, System Administrators, Network Engineers and Systems Engineers supporting the Cyber Range and develop innovative solutions to complex problems. You will be part of a larger development team supporting the Cyber Security Directorate's Defensive Network Operations organization with direct mission support activities when not working on the Cyber Range. This position will support one of our government clients in Laurel, MD.

Responsibilities

+ Provide network and systems administrator support to the Defensive Network Operations (DNO) program for the development and maintenance of the Innovation and Training Center for mission customers.

+ Provide Tier 1/2/3 technical services to perform daily monitoring and troubleshooting of the Innovation and Training Center components

+ Provide maintenance and support for active usage of the Innovation and Training Center, this includes building physical and virtual instances for lab, exercise, training, and other use, tearing down the instances after use is completed, and preparing Innovation and Training Center for the next use;

+ End user support and troubleshooting during all uses of the Innovation and Training Center;

+ Provide installation, upgrade, maintenance and support, patching, troubleshooting and removal of Innovation and Training Center hardware including servers, switches, routers, and firewalls;

+ Configure and administer next generation firewalls (e.g. Palo Alto, McAfee) and suggest new rules, routines, and indicators of compromise.

+ Lead network engineering efforts through subject matte expertise and understanding of the system;

+ Build and maintain complex Linux systems hardened to meet operational standards;

+ Provide installation, upgrade, maintenance and support, patching, troubleshooting and removal of all Innovation and Training Center software;

+ Enable orchestration and automation of the Innovation and Training Center utilizing automation systems such as Puppet, Kickstart, Packer, Terraform, Ansible and Bash/Python scripts;

+ Implement a health and status monitoring solution and,

+ Setup and assist with Microsoft Environments (e.g. Group Policy, Active Directory, etc.), container technologies like Docker and Gluster/libvirt Linux knowledge/abilities and similar technologies.

Minimum Qualifications

+ Bachelor's degree plus 8-years of relevant experience, or Master's degree plus 6-years of relevant experience or an Associate's degree plus 10-years of relevant experience or high school diploma/GED plus 12-years of relevant experience may be considered.

+ Degree must be in Network Engineering, Systems Engineering, Information Technology, or related field.

+ Relevant experience must be in computer or information systems design/development, programming, information/cyber/network security, vulnerability analysis, penetration testing, computer forensics, information assurance and/or systems engineering. Additionally, must have experience in network or system administration.

+ Current experience with management of virtualized infrastructure, to include multi-node and multi-site networks

+ Experience with networking and virtualization

+ Experience with building and maintaining networks consisting of physical and virtual equipment

+ Experience with standard network services – DNS, DHCP, NTP, Syslog, etc.

+ Experience configuring and administering next-generation firewalls (e.g. Palo Alto, McAfee)

+ Experience with Infrastructure as Code (IaC)

+ Experience with scripting languages such as Bash, PowerShell, Batch, and Python

+ Experience with Terraform and Ansible

+ Experience with Puppet, Kickstart, Packer

+ Experience with cybersecurity tools, network configurations, and operational tools

+ Knowledge of operating systems, including Windows and Linux, application behaviors, and network traffic analysis

+ Experience in a fast-paced environment and working with flexible customer requirements

Preferred Qualifications

+ Experience operating in an agile development environment and DevOps

+ Experience with container technologies such as Kubernetes and Docker

+ Knowledge of penetration testing or red team operations

+ Experience utilizing and development with Splunk

+ Experience with Nutanix

+ Defensive Cyber Security Operations​

The ARSIEM pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) job responsibilities, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other laws.

Benefits:

For an overview of our benefits, please visit our benefits tab.

https://www.arsiem.com/careers/

Original Posting Date:

2025-11-04

Clearance Requirement: This position requires an active TS/SCI with a polygraph. You must be a US Citizen for consideration.

Candidate Referral: Do you know someone who would be GREAT at this role? If you do, ARSIEM has a way for you to earn a bonus through our referral program for persons presenting NEW (not in our resume database) candidates who are successfully placed on one of our projects. The bonus for this position is $5,000, and the referrer is eligible to receive the sum for any applicant we can place within 12 months of referral. The bonus is paid after the referred employee reaches six months of employment.

ARSIEM is proud to be an Equal Opportunity and Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status, age, or any other federally protected class.