11,730 Network Administrators jobs in the United States

Job Type

Full-time

Description

Overview

Tanaq Technical Services (TTS), a division of St. George Tanaq (SGT)Corporation, is an 8(a) Alaskan Native Small Business that specializes in delivering Enterprise Integrated Technology Solutions and Support Services to the Federal Government. TTS's innovative approach combines proactive strategies, efficient processes, and emerging technologies to deliver seamless, integrated services for our clients. TTS prides itself in being Mission Driven, People Focused. To learn more about us, visit

About the Role

We are seeking a Senior System Administrator - Network Security to support our federal government customer. The Senior Security Administrator will be the Security Team lead and provide security services and support for the government customers' network, as well as policy compliance support for the Division.

This is a hybrid remote position based in Suitland, Maryland, that will require some onsite work at the customer's location. This position is contingent on contract award.

Responsibilities

• Creating or updating security infrastructure and
• Continually monitoring networks for unauthorized access or suspicious activities.
• Work with company staff members to help them stay connected and keep their work devices secure while they are online.
• Design and operate a training program, Service Level Agreements (SLA's), and Standard Operating Procedures which helps employees understand cybersecurity measures and best practice
• Install new software releases, system upgrades, evaluates and installs patches and resolves software related problems.
• Perform system backups and recovery.
• Maintain data files and monitors system configuration to ensure data integrity.
• Rely on experience and judgment to plan and accomplish goals.
• Provide IT Security support to the Information System Security Officer (ISSO) and System Owner (SO) working closely with System Administrators and other security staff within the USCB.
• Support ISSO with continuous monitoring and risk-profiling activities.
• Create and package evidence and artifacts for TCO-managed components for OIS review.
• Design, install, configure, maintain, administer policy and services, monitor, document, manage, and perform reviews and problem resolution for firewall solution based on NIST guidance and Agency Security Policy that incorporates single and/or multiple firewalls.
• Design, install, configure, maintain, administer policy and services, monitor, document, manage, and perform reviews and problem resolution for Content Filtering solutions that include Web Security Gateways and Email Security Gateways, based of NIST guidance and Agency Information Technology Security Policy.
• Design, install, configure, maintain, administer policy and services, monitor, document, manage, and perform reviews and problem resolution for Network Access Control solution that is based on the most recent version of NIST guidance 800-53 and Census Information Technology Security Policy.
• Performs a variety of IT-related tasks.

• Minimum 8 years of experience in IT security for federal agencies.
• Experience being a team lead or managing/directing others.
• Extensive knowledge of NIST 800-53, FISMA, and federal IT security standards.
• Familiarity with Remedy, Splunk and SolarWinds.
• Experience and expertise in using the Gigamon toolset
• Proficient with standard concepts, practices, and procedures within the IT security field.
• Experience managing systems for a federal government agency.
• Experience with network security, including firewall, VPN, and IDS/IPS management.
• Ability to work collaboratively and independently.
• Excellent verbal and written communication skills.
• Ability to pass required Federal background screening/security check, including basic and expanded investigations. Ability to obtain and maintain both government clearance and customer approval.
• U.S. Citizenship required.

• Bachelor's degree in Computer Science, Information Technology, Engineering or a related field.
• Professional Certifications such as CompTIA Security+ or Certified Information Systems Security Professional (CISSP), CCNA Security, CCNP Security, Adaptive Security Appliance (ASA), Cisco Certified Design Professional (CCDP), CCIE Security, Cisco IronPort Web Security Appliance (WSA), Certified Cloud Security Professional (CCSP), or Global Information Assurance Certification (GIAC) Certifications., or similar certifications, highly desired.

• Candidates must reside in or within commutable distance of Suitland, Maryland.
• Prolonged periods of sitting at a desk and working on a computer. May need to lift up to 25 pounds occasionally.

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Benefits:

• Competitive salary

1. Must have knowledge in the development, configuration, installation, and maintenance of networked systems including local area networks (LANs) and wide area networks (WANs), telephony systems; and perform routing network configuration management functions.
2. Must have knowledge of network standards, protocols, and procedures.
3. Knowledge in network architecture and topology, including transmissions protocols, broadcasting, switching, control, and management.
4. Must have knowledge in performing routing networking configuration management functions.
5. Must have knowledge in network systems management methods including end-to -end systems performance monitoring.
6. Must have experience with using various tools, utilities and appliances, to perform network management, analysis, monitoring, troubleshooting and mitigation.

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Role: Senior Network Security Engineer Email Security Focus

Location: Ewing Township, NJ

Type _ Contract

Job Summary

We are seeking a Senior Network Security Engineer with deep expertise in email security to strengthen our cybersecurity posture. This role involves reviewing, enhancing, and maintaining the security of the organizations email infrastructure, conducting threat analysis, and collaborating with the security operations team to respond to email-related incidents, including phishing, spoofing, malware delivery, and business email compromise (BEC) attempts.

Key Responsibilities

Email Configuration & Optimization

• Review and optimize configurations for email security platforms including Cisco Ironport, Cofense, Abnormal Security, and Microsoft technologies.
• Audit and enforce SPF, DKIM, and DMARC records for proper alignment.
• Maintain and enhance secure email gateway (SEG) and cloud email security configurations.
• Refine policies for anti-spam, anti-malware, and phishing detection.
• Perform daily review of email logs, quarantines, and alerts from security platforms.
• Investigate email-based incidents such as email bombing, phishing, spoofing, and malware.
• Develop and maintain playbooks for email threat detection and response.

Security Operations & Threat Hunting

• Collaborate with Cybersecurity, Infrastructure, third-party SOC, and incident response teams during email security incidents.
• Conduct threat hunting and retrospective analysis using logs and forensic tools.
• Tune alert thresholds, detection logic, and anomaly detection rules in email security platforms.

User Awareness & Support

• Provide technical guidance on secure email practices to support teams and end-users.
• Assist with phishing simulation campaigns and security awareness training related to email threats.

Required Qualifications

• 10+ years in network or cybersecurity roles, with 5+ years dedicated to email security.
• Strong understanding of email protocols (SMTP, IMAP, POP3) and authentication methods (SPF, DKIM, DMARC).
• Hands-on experience with Cisco Ironport, Cofense, Abnormal Security, and Microsoft email technologies.
• Solid knowledge of email-based threats and attacker techniques.
• Proven experience in phishing and business email compromise (BEC) incident response and investigation.

• Seniority level Mid-Senior level

• Employment type Contract

• Industries IT Services and IT Consulting

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• Responsibilities :
  • Configure and maintain firewalls, intrusion prevention systems (IPS), and secure network architecture .
  • Perform network risk assessments and vulnerability scans.
  • Design and enforce access control policies and segmentation strategies.
  • Investigate and respond to security incidents or suspicious network behavior.
  • Work with cross-functional teams to ensure compliance with industry standards and security frameworks (NIST, ISO 27001, etc.).

• Key Tasks :
  • Expertly configure Palo Alto Networks firewalls using features like App-ID, User-ID, and Content-ID.
  • Manage and optimize security policies , NAT , and traffic inspection .
  • Utilize Panorama for centralized firewall management.
  • Troubleshoot complex network security issues related to Palo Alto products.
  • Implement advanced threat prevention and zero trust models using Palo Alto technologies.

• Responsibilities :
  • Configure and manage IPSec, SSL, and client-based VPNs .
  • Troubleshoot connectivity issues and VPN authentication failures .
  • Ensure VPN solutions support MFA, strong encryption , and are aligned with corporate access policies .
  • Monitor and audit VPN sessions to detect misuse or anomalies.
  • Integrate VPN configurations with Palo Alto firewalls and cloud access controls.

• Customer Intimacy : Understand and anticipate customer needs, be flexible and responsive, and value deep, long-term relationships.
• Team Before Self : Be humble, reward and recognize, and respect and value the opinions of all.
• Commitment & Accountability : Take responsibility, be passionate, and be responsive.
• Speed, Excellence & Innovation : Be creative and innovative, find efficient solutions, and provide quality products, services, and solutions.
• CIRCOR Absolutes : Safety, Ethics & Controls.

• Working as part of the Security Architecture & Engineering team, assisting with ongoing, hands-on configuration and management of current and future network security technologies specifically related to Secure Web Gateway (SWG) and Remote Application/Service Access (ZTNA).
• Building, implementing, and maintaining all network security solutions and technologies.
• Assisting with the design and implementation of security monitoring solutions such as SIEM and other tools.
• Designing and implementing network security on Azure cloud and on-premises environments.
• Developing technical solutions and security tools to help mitigate network security vulnerabilities.
• Assessing and identifying security risks in the network and implementing the remediation.
• Auditing, managing, and maintaining network security solutions such as Palo Alto, Zscaler, Layer-7 network security protection solutions, and network access control.
• Administering perimeter security systems such as firewalls, load-balancers, NAC, WAF, etc.
• Providing recommendations and best practices to protect corporate networks and site-located networks.
• Conducting proactive research and analysis to identify security weaknesses.
• Documenting and designing network diagrams for existing and future network architecture.
• Recommending and implementing strategic and tactical changes to network infrastructure.

• Bachelor's degree in information systems or related discipline, or equivalent training.
• 5+ years of related work experience in a network security role.
• Technical expertise in Azure networking and cloud security solutions.
• Strong knowledge and understanding of secure network architecture, protocols, routing, switching, and wireless.
• Deep knowledge in network traffic packet analysis.
• Expertise with threat detection and response tools and automation.
• Ability to stay positive and adapt quickly to changing business models, project requirements, and technologies.
• Ability to think through problems and visualize solutions.
• Ability to implement, administer, and troubleshoot network infrastructure devices, including firewall (Palo Alto, etc.).
• Public Cloud infrastructure (AWS, Azure, GCP).
• Strong understanding of current network security issues and threats and how they can be manifested in complex environments, such as understanding of network fundamentals and common Internet protocols (Ethernet, ARP, IP, ICMP, UDP, TCP, SSL, HTTP, DNS, BGP).
• Strong communication, consultative, influencing, and presentation skills.

• Understanding the best practices, risk & control frameworks, and applicable existing and new legal/regulatory requirements (ITAR, NIST 800-171, CMMC, data privacy and breach notification laws, ISO 27001, NIST CSF and SP 800-53 etc.).
• Security-related certifications such as OSCP, GCIH, GCIA, CCNP, CCNP Security, CCIE, Cloud Networking (Azure), Palo Alto, Checkpoint, Zscaler, and other security certifications.

Details:

Stefanini Group is hiring!

Stefanini is looking for a Network Security Engineer in various locations across USA (Onsite)

For quick apply, please connect with Akash Gupta; Ph: /

W2 Only!

Key Responsibilities:

Firewall Management:

• Design, implement, and maintain firewall policies and rules for Palo Alto and Juniper firewalls.
• Configure and manage Ivanti SSL VPN Gateway to ensure secure remote access.
• Implement and manage Cisco ACI for network segmentation and micro-segmentation.

• Monitor firewall logs and security events to identify and mitigate potential threats.
• Perform regular security audits and vulnerability assessments.
• Develop and enforce security policies and procedures.

• Utilize strong networking skills to troubleshoot and resolve network issues.
• Implement and maintain network segmentation strategies.
• Collaborate with the team to ensure network infrastructure aligns with security best practices.

• Execute and manage Linux server commands for system administration and security.
• Ensure the security and performance of Linux-based servers within the network.

• Document configurations, procedures, and processes.
• Prepare and present reports on security posture, incidents, and improvements.

• Work closely with other IT team members to ensure seamless integration of security measures.
• Provide guidance and support to junior team members.

• Minimum of 5 years of experience in firewall administration and network security.
• Extensive experience with Palo Alto and Juniper firewalls.
• Proven experience with Ivanti SSL VPN Gateway.
• Strong experience with Cisco ACI and micro-segmentation.
• Solid understanding of Linux server commands and administration.

• Excellent problem-solving and analytical skills.
• Ability to work under pressure and manage high-volume workloads.
• Strong communication and interpersonal skills.
• Certifications such as Palo Alto Networks Certified Cybersecurity Associate (PCCSA), Juniper Certified Internet Specialist (JCIS), or equivalent are highly desirable.

• Bachelor's degree in Computer Science, Information Technology, or a related field.

DMI is a leading provider of digital services and technology solutions, headquartered in Tysons Corner, VA. With a focus on end-to-end managed IT services, including managed mobility, cloud, cybersecurity, network operations, and application development, DMI supports public sector agencies and commercial enterprises around the globe. Recognized as a Top Workplace, DMI is committed to delivering secure, efcient, and cost-effective solutions that drive measurable results. Learn more at

DMI, LLC is seeking a Network Security Engineer to join us.

Duties and Responsibilities:

The Network Security Engineer role requires extensive Palo Alto Panorama, Firewalls, and Global Protect experience, along with extensive networking experience. Palo Alto Prisma Access and Zero Trust Network Access knowledge and experience are highly desired. A Network Security Engineer is responsible for providing architectural, technical, and problem resolution support for a Federal Agency network and security infrastructure that promotes a secure and scalable environment that aligns with the security requirements of our customer.

A Network Security Engineer also focuses on both the short-term and the long-term strategy, recommends technology solutions and improvements to the network and security-related environments and is also responsible for delivering clear, concise, timely communications that promote confidence in our team's ability to deliver operational excellence. They also perform Tier III "Build and Run" activities across multiple network and security environments, and review and recommend configuration changes, as needed.

The day-to-day responsibilities include the design, implementation, operations, troubleshooting, and resolution activities across multiple domains. They may be required to participate in system upgrades, deployments, and enhancements while focusing on delivery objectives, critical issues, and policy adherence. All Network Security Team members periodically work after hours to support system outages and critical infrastructure upgrades. This position may also require an on-site presence one or more days per week.

Education:

BS Degree in Computer Science or Engineering, or equivalent work experience (required)

Experience:

• 10+ years of relevant technical Network/Security Engineering experience (required)
• Certifications: Desire three or more of the following: CCNP, CCDP, CCSP, CISSP, OSCP, PCNSE, PCNSA, ITIL

Required Skills:

• Extensive experience with Palo Alto Firewalls (ex: 3200 and 5200/5400/5600 series)
• Extensive experience with Palo Alto Panorama 9.x and above
• Extensive experience with Palo Alto Global Protect
• Extensive experience with Palo Alto Firewall Threat Protection, URL filtering, and other similar security features
• Extensive experience with decryption/TLS/Security Profiles/PKI and deep understanding of PCAPS
• Extensive experience with application-based traffic and designing solutions for Firewalling (Internal/Perimeter/External)
• Experience with Palo Alto Prisma Access-based Infrastructure, supporting multiple Data Centers and numerous offices

Desired Skills and Abilities:

• Vendor hardware and software support, such as Cisco, Juniper, Palo Alto, and others
• Data Center, WAN, LAN, WLAN, Firewall, and Load Balancer systems and support
• Analysis and forensic tools, along with effective troubleshooting of ingress/egress and zoned traffic
• Azure Infrastructure and understanding Azure VNETs, Routing, and Firewalling
• Microsoft Entra ID and SAML authentication
• Laptop setup and configurations
• Implementing ZTNA with an understanding of all integration points of the ZT pillars, such as endpoint, identity, and workloads
• Developing ZT security policies that incorporate telemetry from identity systems, endpoints, and external management systems
• Whitelisting IP space for various project teams to access external vendors and to ensure safe and secure connectivity
• Creating Zones and Policies for various network segments and troubleshooting connectivity across Security Zones
• Work with internal applications teams, design, and implement an appropriate ZTNA program with PA Prisma Access
• Develop documents that describe design, security controls, and operational manuals
• Develop and participate in internal and external testing of applicable applications to ensure that sufficient security is in place
• Effective time management and organizational skills, and ability to translate technical issues for business users
• Work independently as well as in a team environment with effective interpersonal communication skills
• Analytical, communication, and problem-solving skills
• Support InfoSec Standards and Best Practices
• Thrives in a fast-paced environment and looks for ways to do things more effectively (Current Mode/Future Mode)

Additional Requirements: Successful completion of a Public Trust background investigation and/or a Public Trust clearance.

Min Citizenship Status Required: Must be a U.S. Citizen

Physical Requirements: No physical requirements are needed for this position.

Location: Arlington, VA / Dallas, TX

#LI-MP1

DMI is a diverse, prosperous, and rewarding place to work. Our culture is shaped by five core values that guide how we work, grow, and succeed together:

• Do What's Right - We lead with honesty and integrity.
• Own the Outcome - We take responsibility and deliver.
• Deliver for Our Customers - We are relentless about delivering value.
• Think Bold, Act Smart - We innovate with purpose.
• Win Together - We collaborate and celebrate our success.

These values aren't just ideals-they show up in how we support every part of your well-being:

• Convenience/Concierge - Virtual health visits, commuter perks, pet insurance, and entertainment discounts that make life easier.
• Development - Annual performance reviews, tuition assistance, and internal career growth opportunities to help you thrive.
• Financial - Generous 401(k) matches, life and disability insurance, and financial wellness tools to support your future.
• Recognition - Annual awards, service anniversaries, referral bonuses, and peer-to-peer shoutouts that spotlight your achievements.
• Wellness - Healthcare coverage, wellness programs, flu shots, and biometric screenings to support your health.

DMI values employees for their talents and contributions, and we take pride in helping our customers achieve their goals. Because when we live our values, we all win together.

*** No Agencies Please ***

Applicants selected may be subject to a government security investigation and must meet eligibility requirements for access to classified information. US citizenship may be required for some positions.

Granite delivers advanced communications and technology solutions to businesses and government agencies throughout the United States and Canada. We provide exceptional customized service with an emphasis on reliability and outstanding customer support and our customers include over 85 of the Fortune 100. Granite has over $1.85 Billion in revenue with more than 2,100 employees and is headquartered in Quincy, MA. Our mission is to be the leading telecommunications company wherever we offer services as well as provide an environment where the value of each individual is recognized and where each person has the opportunity to further their growth and achieve success.

Granite has been recognized by the Boston Business Journal as one of the "Healthiest Companies" in Massachusetts for the past 15 consecutive years.

Our offices have onsite fully equipped state of the art gyms for employees at zero cost.

Granite's philanthropy is unparalleled with over $300 million in donations to organizations such as Dana Farber Cancer Institute, The ALS Foundation and the Alzheimer's Association to name a few.

We have been consistently rated a "Fastest Growing Company" by Inc. Magazine.

Granite was named to Forbes List of America's Best Employers 2022, 2023 and 2024.

Granite was recently named One of Forbes Best Employers for Diversity.

Our company's insurance package includes health, dental, vision, life, disability coverage, 401K retirement with company match, childcare benefits, tuition assistance, and more.

If you are a highly motivated individual who wants to grow your career with a fast paced and progressive company, Granite has countless opportunities for you.

EOE/M/F/Vets/Disabled

General Summary of Position:

We are seeking a highly skilled and motivated Network Security Engineer to join our team. The successful candidate will be responsible for designing and building complex multi-vendor network solutions to support our North American business customers and maintain our core infrastructure. This role requires in-depth knowledge of various network technology and vendor implementations including Fortinet, Cisco. The ideal candidate will have strong expertise in routing protocol design, security, sd-wan implementations, and comprehensive documentation skills.

Duties and Responsibilities:

• Design, implement, and maintain complex multi-vendor network solutions for business customers.
• Collaborate with cross-functional teams to assess network requirements and develop appropriate solutions.
• Configure and troubleshoot network devices, including routers, switches, firewalls, and other network appliances.
• Develop, maintain, iterate and improve internal reference architecture.
• Ensure network security by implementing and managing firewalls, VPNs, and other security measures.
• Develop and maintain detailed network documentation, including design diagrams, configuration guides, and standard operating procedures.
• Monitor network performance, identify issues, and implement solutions to optimize network efficiency.
• Provide technical support and guidance to customers and internal teams.
• Stay updated with the latest industry trends and technologies to ensure network solutions are current and effective.
• Participate in on-call rotations and respond to network emergencies as needed.
• Operate and maintain vendor specific core infrastructure including tracking licensing, tracking, planning and conducting firmware upgrade.

Required Qualifications:

• Minimum of 2-3 years of experience in network and security engineering.
• Proficiency in designing and implementing network solutions using vendors such as Fortinet, Cisco.
• Strong understanding of routing protocols (e.g., BGP, OSPF) and VPN tunnels.
• Experience with network security principles and practices, including firewalls, VPNs, and intrusion detection/prevention systems.
• Excellent troubleshooting and problem-solving skills.
• Ability to create and maintain detailed network documentation.
• Strong communication skills and ability to work effectively in a team environment.
• Experience with Network Automation/DevOps including familiarity with Python, CI/CD tools and scripting large deployments/complex changes.
• Relevant certifications such as NSE 4,5,6,7, CCNP, or equivalent.
• Experience in a customer-facing role, providing technical support and solutions.
• Experience operating hypervisors, on prem and in the cloud.
• Experience operating the Fortinet product suite: Fortimanager, Fortianalyzer, etc.

Preferred Qualifications:

• Preferred 5-8 years of experience in network and security engineering.
• Extensive familiarity with the Fortinet product offering.
• Experience operating and maintaining data center grade Fortinet equipment, experience planning and conducting upgrade cycles for Fortinet equipment.
• Experience at Managed Service Providers that support Fortinet.
• Advanced certifications such as Fortinet NSE 7, 8+, CCIE, JNCIP or equivalent.
• Experience with multi-cloud networking (MCN), unified SASE and network function virtualization (NFV).
• Knowledge of wireless networking technologies and solutions.