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Network Engineer III

DPP

Job Location:

San Antonio, TX - USA

Monthly Salary: Not provided by the employer

Posted: 17 September 2026 (3 days ago)

Application Deadline: 15 December 2026

Vacancies: 1 Vacancy

Job Summary

DPP is seeking a Network Engineer III for an opportunity with our client in the Aerospace and Defense Manufacturing industry.

Work location: Onsite in San Antonio TX
Duration: 7 months
Terms: W2 Contract
Work authorization: US Citizen; must hold a current/active Top-Secret clearance with SCI eligibility

Position Summary:

The Network Engineer III will support our Engineering & Sciences San Antonio department.
As a member of the San Antonio department youll get to help architect and build a launch execution network building and sustaining highavailability launch and missile test networks that span classified and unclassified enclaves.
As a networkstrong engineer with meaningful cyber depth you will lead network design implementation and performance tuning while partnering with cyber teams to embed RMFaligned protections and secure baselines into the infrastructure.

Responsibilities:

Design and plan network communications systems.
Provide specifications and detailed schematics for network architecture.
Provide specific detailed information for hardware and software selection implementation techniques and tools for the most efficient solution to meet business needs including present and future capacity requirements.
Conduct testing of network design.
Maintain technical expertise in all areas of network and computer hardware and software interconnection and interfacing such as routers multiplexers firewalls hubs bridges gateways etc.
Evaluates and reports on new communications technologies to enhance capabilities of the network.
Serve as a network engineer on a multidisciplinary team designing and sustaining complex multinode launch and test networks spanning classified and unclassified enclaves.
Work with customer ISSMs/ISSOs and cyber engineering teams to develop and implement network changes in environments operating under or seeking an ATO/IATT ensuring network designs align with RMF/ATO requirements.
Design plan configure and maintain enterprisescale network communications systems delivering and maintaining detailed schematics and specifications for routers switches firewalls multiplexers bridges gateways and related hardware/software.
Lead endtoend testing of network designs validate configurations and monitor hardware and link performance to ensure proper settings reliability availability and compliance with security policies and control objectives.
Develop and execute implementation plans for network enhancements upgrades and migrations coordinating with stakeholders to minimize service disruption and thoroughly documenting all changes and rollback plans.
Engineer and operate core network services (e.g. DNS DHCP NTP AAA) and segmented architectures that enforce welldefined trust boundaries and enable controlled information sharing between multiple enclaves.
Support the architecture and design of bakedin cybersecurity protections by implementing and tuning networklevel security controls (e.g. firewalls VPNs ACLs IDS/IPS NAC) in close coordination with cyber/security teams.
Participate in network operations activities (fault/performance monitoring incident response support change management) using NMS/monitoring tools and log/SIEM platforms as part of an integrated NOC/SOC construct.
Perform physicallayer installation tasks (e.g. fiber patch panels encryption devices) and ensure accurate asbuilt documentation and configuration baselines are maintained.
Produce periodic status reports engineering change documentation and network design artifacts; communicate technical options tradeoffs risks and recommendations to internal and external stakeholders.

Required Qualifications:

Bachelors degree in a Science Technology Engineering or Mathematics (STEM) discipline from an accredited institution and 8 years of related professional/military experience in engineering;
OR a Masters degree in a STEM discipline and 6 years of related experience;
OR a Ph.D. in a STEM discipline and 4 years of related experience.
US Citizenship with a current DoD Top Secret security clearance and SCI eligibility/access that has been active within the last 24 months.
DoD 8570 IAT Level II certification (e.g. Security CE) or equivalent prior to start.
Hands on experience planning implementing operating and troubleshooting routed and switched IP networks (e.g. IPv4 OSPF VLANs VPNs firewalls) in mission critical or real time environments including administration of Microsoft and Linux networked systems and applying foundational cybersecurity practices (e.g. hardening secure configuration access control) in collaboration with cyber/security teams.

Preferred Qualifications:

Proven experience acting as a network design authority or principal engineer for new deployments or major redesigns from concept through implementation and cutover including high and lowlevel designs ICDs addressing and routing plans firewall/ACL matrices and NOC runbooks.
Extensive handson experience designing implementing and maintaining enterprisescale physical and virtual networks (e.g. Cisco routing/switching firewalls VPNs VMware vSphere/ESXi/NSX) with wellmaintained network schematics and configuration baselines.
Deep technical expertise with routing and switching in enterprise or mission networks including route filtering convergence tuning VLAN/VXLAN spanningtree variants MLAG/portchanneling QoS and traffic engineering and tuning network security controls (e.g. firewalls IDS/IPS NAC endpoint protection); Cisco CCNP (or higher such as CCIE) certification is strongly preferred.
Experience architecting and supporting multinode test or launch networks for missile test ranges weapon systems or other realtime mission systems where latency determinism and availability are critical.
Strong experience in engineering and securing DNS DHCP NTP and AAA (RADIUS/TACACS) within missioncritical networks including splithorizon DNS DNSSEC DHCP authorization authenticated NTP and integration of these services with identity systems (e.g. Active Directory identity management solutions).
Extensive experience designing segmented architectures (user server management security outofband components) with welldefined trust boundaries in multidomain or crossdomain environments including segregation and controlled information sharing between classified and unclassified networks using solutions such as guards data diodes and MLS/CDS systems.
Demonstrated ability to align network architecture with RMF/ATO requirements and apply DISA STIGs/CIS benchmarks to routers switches firewalls VPN gateways and other network appliances building standard network baselines (AAA logging NTP SNMP management access banners crypto settings) and verifying compliance at scale.
Proficiency in automation configuration management and InfrastructureasCode for network automation (e.g. Ansible Python Bash PowerShell or similar tools) including device provisioning configuration templating drift detection bulk policy updates (ACLs QoS routing policies) and automated compliance checks.
Experience working within an integrated Network Operations Center (NOC) (fault/performance monitoring event correlation escalation workflows collaboration with SOC personnel) combined with strong troubleshooting skills across layers 17 and a track record of restoring service quickly in complex environments.
Experience leading endtoend network testing and validation including performance resiliency and failover testing in complex distributed environments and developing/executing implementation plans for network upgrades migrations and enhancements while minimizing mission impact; experience with voice and realtime services over IP (e.g. VoIP SIP trunking QoS) in converged voice/data networks is highly desired.
Strong interpersonal written and verbal communication skills; demonstrated ability to work with crossfunctional cyber systems software and test teams to capture requirements document designs and decisions and brief options tradeoffs risks and recommendations to both technical stakeholders and leadership/customer representatives.

Interested Learn more:
Click the apply button to learn more about this position (#26-01018).

DP Professionals (DPP) offers a range of compensation and benefits packages to our employees and their eligible dependents. DPP is a certified Woman-owned Small Business Enterprise (WBE and WOSB) with more than 25 years in the staffing industry. EOE/AA/V/D

Required Experience:

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