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Sr. Network Administrator
As a Sr. Network Administrator, you are a vital part of our technology infrastructure team, ensuring the reliability, security, and performance of our network systems. You design, implement, and manage our network infrastructure, playing a key role in supporting our organization's mission and enabling seamless operations. You are a technical leader who provides guidance and mentorship to junior team members, fostering a culture of continuous improvement and innovation.
This position requires an Active DoD Secret Clearance.
This position is Fully Remote.
Job Duties and Responsibilities:
- Design, implement, and maintain secure AWS GovCloud-based network architecture
- Support high-availability configurations across Availability Zones.
- Architect network configurations to support 99.99% uptime objectives and rapid failover.
- Develop and maintain detailed network diagrams and architecture documentation.
- Configure and manage VPN gateways, Load balancers, Elastic IP configurations
- Monitor bandwidth utilization, latency, and throughput.
- Optimize performance to support high transaction volumes and low-latency user experiences.
- Implement and maintain network security controls aligned to:
- DoD cybersecurity mandates
- DISA STIG requirements
- CC SRG guidance
- Harden network components and validate configuration compliance.
- Support vulnerability remediation and patch management activities.
- Collaborate with cybersecurity teams on incident response and containment.
- Ensure secure interconnections with external DoD systems and APIs.
- Implement 24/7 monitoring and alerting for network availability and anomalies.
- Conduct proactive capacity planning and scalability assessments.
- Perform root cause analysis on outages or performance degradation.
- Validate backup and disaster recovery network pathways.
- Support secure API integrations and third-party system interfaces.
- Participate in Technical Status Meetings and provide network health updates.
- Contribute to Monthly Status Reports with network metrics and risk posture.
Maintain and update:
Network architecture diagrams
Configuration management documentation
SOPs and runbooks
- Recommend infrastructure improvements to enhance resilience and scalability.
- Support Authority to Operate (ATO) sustainment documentation as required.
Education & Experience:
- Bachelor's degree in Computer Science, Information Technology, or a related field.
-
10 years of experience in network administration.
- 5 years of experience in a DoD environment
- Proven experience with firewall management, VPN configuration, and network security.
- Experience with cloud networking, particularly AWS GovCloud.
- Experience with scripting and automation.
- Certified as a AWS Solutions Architect
- Active DoD Secret Clearance
Preferred Qualifications:
- Relevant certifications such as CCNA, CCNP, or CISSP
Why Join Sierra7?
Sierra7 is a Small Disabled Veteran Owned Business. We were founded in 2009 with the mission of “serving those who serve". We are a Service-Disabled Veteran-Owned Small Business (SDVOSB) and CMMI-SVC Level 3-appraised member of the government technology and services industry. We are a proud recipient of the 2024 Gold HIRE Vets Medallion Award from the US Department of Labor, which recognizes employers who successfully recruit, hire, and retain Veterans.
Benefits:
- Medical/Dental/Vision
- FSA (Flexible Spending Account)
- HSA (Health Savings Account)
- Life Insurance, Voluntary Life Insurance, Voluntary Short- and Long-Term Disability
-
Additional Supplemental Medical Benefits
- Critical Care, Hospital Indemnity, Legal Plan, Accident
- 401K
- Legal Assistance
- Financial Wellness
- Paid Time Off (PTO)
- Federal Holidays
- Education Reimbursement
- LinkedIn Learning
- Employee Referral Program
This posting is for prospective candidates only. Unsolicited third-party resume submissions will be considered property of Sierra7, Inc. and will not be acknowledged or returned.
We will never send communications through any other domain, including @sierra7careers.com, @gmail.com or @yahoo.com. ALL communications will come from a @sierra7.com domain. We will never request payment from you, nor will we send payment to you, prior to your start date. If you have been asked to send or receive any payment, or if you have any doubt about whether you have been contacted by a Sierra7 employee, please contact us at Talent.Acquisition@sierra7.com
Disclaimer:
As required by local law, Sierra7 provides reasonable ranges of compensation for hired roles based on labor costs in the states of California, Colorado, Hawaii, Illinois, Maryland, Minnesota, New York, Washington, and the District of Columbia. The base pay range for this position in these locations is shown below. Compensation for roles at Sierra7 varies depending on a wide array of factors, including but not limited to office location, role, skill set and level of experience.
The above statements are intended to describe the general nature and level of work being performed by people assigned to this classification. They are not to be construed as an exhaustive list of all responsibilities, duties, and skills required of personnel so classified.
Sierra7 will not provide sponsorship for employment-based immigration benefits for this position. To be considered for this position all candidates must be a US Citizen. This position is not a C2C opportunity.
Sierra7 will not provide sponsorship for employment-based immigration benefits for this position. To be considered for this position all candidates must be a US Citizen. This position is not a C2C opportunity.
Sierra7 is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to any status protected by federal, state, or local law.
Equal Opportunity Employer Veterans Disabled
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