Senior Systems Integration & DevSecOps Engineer

Accelint Holdings LLC; Sterling (VA); On-site; USD 120,000 - 180,000; Full time

Job summary

Lyntris is seeking a Senior Systems Integration & DevSecOps Engineer for on-site work in Sterling, VA. The role focuses on integrating and testing complex DoD software systems, building repeatable tooling, and maintaining secure pipelines across modular architectures.

Ideal candidates have deep experience in software integration, test automation, and secure environments, with TS/SCI clearance and U.S. citizenship. Work is performed in a classified environment with standard on-site hours.

Qualifications

• Minimum 5 years of relevant experience in software integration and DevSecOps
• Experience building test automation, harnesses, or test utilities
• Experience with secure or regulated software environments
• U.S. citizenship and active TS/SCI security clearance prior to start date

Responsibilities

• System Integration & Test: Integrate and test software subsystems and external systems; write and maintain SWIT and SIT test threads; participate in integration events with government stakeholders.
• Test Tooling & Automation: Build and maintain test tooling (simulators, stubs, data generators); develop automated test suites; extend CI/CD regression coverage.
• Reusable Engineering: Create versioned, documented tooling assets for reuse across programs; contribute to conventions for interface documentation and environment config.
• Infrastructure & DevSecOps: Use containers to deploy software; build automation pipelines; implement security controls in the pipeline.
• Collaboration & Documentation: Work with cross-functional teams; write and maintain docs for integration, test, and deployment; share practices with junior engineers

Skills

Systems integration

DevSecOps

Python

Linux shell scripting

GitLab

Education

STEM degree

Tools

Kubernetes

Docker

Podman

Helm

ArgoCD

Flux

GitLab

Artifactory

Job description

About this position

NOTE: This position will be onsite at a facility in Sterling, VA

**This position requires anactive U.S. national security clearance.To learn more about the security clearance process please access thislink.

Lyntrisis a defense technology company that connects sensing to action across the connected battlespace.Lyntrisbrings together the talents ofAccelintand Vitesse teams under one mission, with each contributing deepexpertisewithin their domain.Combining differentiated hardware,softwareand missionexpertise, Lyntris helps customers sense threats, make sense of complex conditions and act with greater speed,precisionand confidence in contested environments.

Lyntris supports U.S. and allied defense organizations across every branch — including Navy, Army, Air Force, SpaceForceand allied partners — spanning strategic,operationaland tactical missions and every domain: Space, Air, Land, Sea and Cyber. With more than 200 active defense programs,Lyntrisworks at every level of the mission, from national command authority to the tactical edge.

Solutions are designed by operators who understand the mission, engineered for the conditions that degrade or defeat standard systems, and built on an open, modular architecture that integrates into existing programs without requiring them to start over.Lyntrismoves faster than the traditional defense cycle — with integrated design, build and test capabilities in-house — and delivers systems that sustain and endure long after initial fielding.

Job Description

Senior Systems Integration & DevSecOps EngineerFull timeOnsite

NOTE: This position will be onsite at a facility in Sterling, VA

**This position requires anactive U.S. national security clearance.To learn more about the security clearance process please access thislink.

Lyntrisis a defense technology company that connects sensing to action across the connected battlespace.Lyntrisbrings together the talents ofAccelintand Vitesse teams under one mission, with each contributing deepexpertisewithin their domain.Combining differentiated hardware,softwareand missionexpertise, Lyntris helps customers sense threats, make sense of complex conditions and act with greater speed,precisionand confidence in contested environments.

Lyntris supports U.S. and allied defense organizations across every branch — including Navy, Army, Air Force, SpaceForceand allied partners — spanning strategic,operationaland tactical missions and every domain: Space, Air, Land, Sea and Cyber. With more than 200 active defense programs,Lyntrisworks at every level of the mission, from national command authority to the tactical edge.

Solutions are designed by operators who understand the mission, engineered for the conditions that degrade or defeat standard systems, and built on an open, modular architecture that integrates into existing programs without requiring them to start over.Lyntrismoves faster than the traditional defense cycle — with integrated design, build and test capabilities in-house — and delivers systems that sustain and endure long after initial fielding.

Job Description

The Senior Systems Integration & DevSecOps Engineer is a hands‑on engineering role focused on integrating and testing complex DoD software systems, building the tooling that makes that testing repeatable, and maintaining the secure pipelines and environments those systems deploy into. This engineer works across subsystem and external system boundaries, writes the automation that catches integration problems before formal test events, and builds tooling with an eye toward reuse beyond a single program.

This position supports the Beyond Line of Sight (BLOS) Engagement Controller and Manager (BECM) program and requires solid software integration engineering, test engineering, and DevSecOps experience in classified, highly regulated environments.

Work Environment:Full‑time on‑site in Sterling, VA, split between standard office space and SCIF work. Flexible daily start and end times, coordinated with program needs and facility access windows.

Duties & Responsibilities

System Integration & Test

Integrate and test software subsystems and external systems, identifying issues related to interface contracts, data exchange, timing, usability, functionality, safety, and securityWrite and maintain SWIT and SIT test threads, cases, and steps, and support traceability from requirements through verification evidenceParticipate in integration events with external system owners and government stakeholders, including dry runs, formal test events, and site activitiesTriage integration defects across system boundaries, isolate root cause, and work with the responsible team to drive closure

Test Tooling & Automation

Build and maintain test tooling: simulators, stubs, message injectors, data generators, log analyzers, and results reportingDevelop automated test suites and utilities, and keep them current as subsystems and external interfaces changeExtend automated regression coverage inside CI/CD so integration failures surface early rather than at test eventsProduce consistent test reporting and evidence artifacts for both engineering and compliance consumers

Reusable Engineering

Build tooling and test assets as versioned, documented components rather than one‑off scripts, so they hold up when another program picks them upFlag duplicated effort across teams and help consolidate it into shared componentsContribute to common conventions for interface documentation, test structure, and environment configuration

Infrastructure & DevSecOps

Use container technologies to configure and deploy software to lab, integration, and customer site environmentsBuild and maintain automation pipelines, artifact management, and environment provisioning, including disconnected and classified enclavesImplement security and compliance controls inside the pipeline rather than at the end of the cycle

Collaboration & Documentation

Work with cross‑functional teams to define, design, and implement new software and its verification approachWrite and maintain documentation for integration, test, and deployment processesShare integration and test practices with less experienced engineers on the teamStay current with developments in software integration, test engineering, and secure delivery

Required Qualifications

A degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 5 years of relevant experience, or an advanced degree in a related field and a minimum of 3 years of experienceHands‑on experience integrating and testing software across subsystem or external system boundariesExperience building test automation, harnesses, or test utilities, not only authoring test cases against existing toolingExperience working in secure or regulated software environmentsExperience working in cross‑functional software development teamsWorking knowledge of at least one major public cloud provider (AWS or GCP preferred)Experience with container and orchestration technologies (e.g., Kubernetes, Docker, Podman, Helm, ArgoCD, Flux)Proficiency with Python and testing frameworks such as Pytest; Linux shell scripting and core CLI tooling (grep, awk, sed, ssh, scp); pipeline development using tools such as GitLab and ArtifactoryExperience creating test threads, cases, and steps for SWIT and/or SITActive and transferable TS/SCI U.S. government issued security clearance required prior to start dateU.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Preferred Qualifications

Experience testing distributed, real‑time, or message‑driven systems where timing and ordering matterExperience building interface simulators or emulators for systems unavailable in the labExperience with test reporting and results aggregation standards (e.g., JUnit XML, CTRF, Allure)Experience with behavior‑driven test formats (Gherkin, Cucumber)Experience with data integration and streaming technologies, including NiFi, Kafka, and REST APIsExperience mentoring engineers or leading a small technical effortExperience with documentation tools like SwaggerExperience with modeling tools like CameoAWS Certified Solutions Architect Associate certificationCertified Kubernetes Administrator certificationDoD IAT Level II security certification (Security+ CE, GSEC, SSCP, or CCNA Security)

Physical Requirements

Prolonged periods sitting at a desk and working on a computer.Must be able tolift upto 15 pounds at times.This position has an on‑site requirement of 5 days per week at a secure controlled information facility in Sterling, VA.

Clearance Requirements

Some positions willrequire access to U.S. National Security information. Positionsthat require this access will berequiredto receive andmaintaina U.S. government personnel security clearance (PCL). In order toqualify for this position, the candidate must be a US Citizen and either currentlypossessthis National Security eligibility or be able to complete the investigation application process with a favorable determination andmaintainthat eligibility throughout their employment. To learn more about the security clearance process please access thislink.

EEOC & Know Your Rights

Lyntriscompanies are Equal Opportunity Employers. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, disability, status as a protected veteran or any other status protected by applicable federal, state, and local law. We ensure that all employment decisions, including hiring, promotion, compensation, and other terms and conditions of employment, are based on merit, qualifications, and business needs. For more information about your rights, please review the "Know Your Rights" poster from the Equal Employment Opportunity Commission (EEOC). Know your Rights:EnglishSpanish

Pay Scales & Benefits

The listed pay scale reflects the broad, minimum to maximum, pay scale for this position for the location for which it has been posted and is not a guarantee of compensation or salary. Other compensation considerations may include, but are not limited to, job responsibilities, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, or other applicable factors.