Network Engineer

Techsur Solutions LLC•Reston, VA

18d•Hybrid

About The Position

TechSur Solutions is a digital services company whose mission is to enable digital transformation for our customers to improve quality and efficiency. Based in the DC metropolitan area, TechSur specializes in advanced cloud services, modernization for both IT structures and applications, leveraging Agile development, and Data Analytics. Since we were formed in August of 2016, we have supported multiple impactful and exciting government programs. Position Summary We are seeking a highly skilled Network Engineer (Mid–Senior Level) to design, maintain, secure, and optimize our on-premises and cloud-connected infrastructure. The ideal candidate will have strong hands-on experience with firewalls, switches, routers, laptops/endpoints, Office 365 tenant administration, Azure services, and modern network security practices. This role is critical to maintaining integrity, confidentiality, and availability of systems that handle sensitive organizational and client data.

Requirements

5–8+ years of experience in network engineering or related roles.
Strong hands-on expertise with Cisco routers, switches, firewalls (ASA/FTD) or equivalent appliances.
Experience managing on-prem and hybrid network architecture.
Solid understanding of TCP/IP, routing protocols, DNS, DHCP, VPN, SD-WAN, and network troubleshooting.
Proficiency with Azure (networking, identity, security) and Office 365 administration.
Familiarity with PowerShell or automation tools for network/cloud operations.
Demonstrated experience implementing and maintaining secure network boundaries.
Excellent communication, problem-solving, and documentation skills.

Nice To Haves

Cisco certifications: CCNA/CCNP (or equivalent knowledge).
Microsoft certifications in Azure or M365.
Experience working in environments with sensitive data, regulatory controls, or formal security processes.
Exposure to zero-trust architectures, SASE, SIEM/SOAR, and endpoint management platforms (Intune preferred).

Responsibilities

Manage and maintain on-prem network systems including Cisco firewalls, switches, routers, and wireless infrastructure.
Oversee network segmentation, VLAN design, routing, and redundancy planning.
Monitor system health, capacity, and performance; optimize for uptime, throughput, and reliability.
Manage connectivity across corporate offices, remote workers, VPN users, and cloud environments.
Implement and maintain strong perimeter defenses, IDS/IPS configurations, and security policies.
Enforce secure configurations across all network appliances following CIS benchmarks and industry leading practices.
Collaborate with the security team to support audits, vulnerability assessments, incident response, and remediation.
Ensure protection of sensitive data across endpoints, servers, and cloud workloads.
Maintain logging, monitoring, and compliance reporting across all managed systems.
Manage and secure the Office 365 tenant, including identity, authentication, Exchange Online, Teams, and admin center operations.
Support and integrate Azure networking elements—VNets, VPN gateways, firewalls, private endpoints, NSGs, and hybrid configurations.
Assist with zero-trust initiatives, identity hardening, MFA/conditional access optimization, and cloud service connectivity.
Oversee build, configuration, patching, and lifecycle management of laptops and local systems.
Ensure secure baseline configurations for endpoints, including BitLocker, antivirus, posture management, and patch compliance.
Troubleshoot connectivity, device performance, and secure access issues.
Own documentation of network diagrams, configurations, change management, and operational runbooks.
Participate in on-call rotations and handle priority incidents with urgency.
Lead or contribute to network modernization, cloud adoption, and infrastructure-as-code initiatives where applicable.
Evaluate and recommend new technologies to enhance performance, security, and scalability.
Work closely with the cybersecurity, cloud, help desk, operations, and leadership teams.
Communicate technical concepts clearly to both technical and non-technical stakeholders.
Participate in planning meetings, system design sessions, and project implementation cycles.