Senior Integration Engineer

Concept Solutions, LLC (CS) is seeking an experienced Senior Integration Engineer to support a mission-critical application modernization program for a Department of War (DoW) customer.

This initiative will modernize and streamline access across a portfolio of production applications by establishing a unified platform with single sign-on, a common user experience, and a repeatable approach to integrating applications.

As a Senior Integration Engineer, you will play a key role in maintaining and enhancing the integration services that connect these applications. You will work with API gateways, legacy interfaces, and modern integration patterns to ensure reliable communication between systems while supporting the continued operation of existing mission-critical applications.

• Maintain privileged access to integration services and API gateways connecting the application portfolio.
• Troubleshoot and resolve integration incidents, defects, and connectivity issues to ensure system reliability and continuity.
• Maintain integration contracts, correlation identifiers, and acknowledgment mechanisms across connected systems.
• Establish and maintain OpenAPI contracts at the platform gateway to standardize existing integrations.
• Support the platform team's data feeds and integration requirements.
• Work with legacy interfaces and existing application integrations to support modernization without disrupting ongoing operations.

• 7+ years of experience in integration engineering, including REST APIs, OpenAPI specifications, API gateways, and message-based or Change Data Capture (CDC) integration patterns.
• Demonstrated experience working with legacy interfaces and integrating systems developed by other teams or vendors.
• Ability to troubleshoot complex integration issues and support production application environments.

Preferred Qualifications

• Experience with Envoy, Debezium, MuleSoft, or similar integration technologies.
• Current favorably adjudicated Tier 5 investigation or active Top Secret clearance.

Work Location and Schedule

Location: Hybrid. Reston, VA headquarters and approved remote locations within the United States, with on-site work at Government facilities in Northern Virginia and Maryland as required. Government-furnished equipment is used for all access to Government environments.

Schedule: Full-time, Monday through Friday, with core hours of 9:00 a.m. to 3:00 p.m. Eastern. Work follows two-week sprints, with a customer demonstration each sprint.

Travel: 0–10%, within the Washington, DC metropolitan area.

Security Requirement: U.S. citizenship required. This is a privileged-access role. Candidates must hold a current favorably adjudicated Tier 5 investigation, hold a Top Secret clearance, or be eligible to obtain one. An active clearance may allow an earlier start.

Compensation: $170,000–$180,000 annually, depending on experience.

This position is contingent upon contract award, with an anticipated start in October 2026.

Company Profile:

Founded in 1999 and headquartered in Reston, Virginia, Concept Solutions, LLC (CS) is a leading small business in technology, engineering, and management consulting. We are the innovative and agile force behind strategic solutions that enhance organizational efficiency and safeguard our nation across Aerospace, Defense, and National Security sectors.

For over 25 years, CS has been a trusted partner for the Federal Aviation Administration (FAA), Department of Homeland Security (DHS), Department of Justice (DOJ), Department of Defense (DoD) and other federal agencies delivering vital IT, security, and project management services.

Our commitment to excellence is reflected in our adherence to CMMI-DEV ML3, ISO 9001:2015, ISO/IEC 20000-1:2018, and ISO/IEC 27001-1:2013 standards. CS boasts company highlights that include:

• Over two decades of experience across over $300 million in contract awards supporting critical FAA programs
• Multiple contract vehicles providing opportunities across FAA, DoD, NOAA, and other Federal agencies
• Innovation Council - CS maintains an active Internal Research and Development (IR&D) program that is geared towards identifying emerging technologies and pursuing technological innovations

At CS, we know our success stems from our talented team. That’s why we prioritize the wellbeing and growth of our employees, fostering a positive culture centered on innovation, engagement, and career development.

Benefits: Concept Solutions offers a competitive benefits and salary package you would receive from a large company. We offer health, dental, vision and life insurance, as well as a comprehensive 401(k) plan with matching and immediate vesting.

Concept Solutions is an Equal Opportunity Employer, and we value workplace diversity. We invite resumes from all interested parties and consider applicants for all positions without regard to race, color, religion, sex, national origin, age, marital status, sexual preference, personal appearance, family responsibility, the presence of a non-job-related medical condition or physical disability, matriculation, political affiliation, veteran status, or any other legally protected status. Concept Solutions is a VEVRAA federal contractor, and we request priority referral of veterans for available positions.