Software Application Support Engineer

ManTech International; United States; On-site; USD 80,000 - 110,000; Full time

Job summary

MANTECH seeks a Software Application Support Engineer to join our technical support team in Chantilly, VA. You’ll be the technical expert for our custom software applications, assisting enterprise clients and internal users with complex configurations and integrations.

Minimum qualifications include a Bachelor’s degree in IT/CS/MIS or equivalent, 4+ years in technical software support, and strong SQL, HTML/CSS/JS, RESTful APIs, and cloud experience (AWS/Azure). TS/SCI with Poly is required.

Qualifications

• Bachelor’s degree in Information Technology, Computer Science, MIS or equivalent tech degree with 4+ years in technical software support.
• Strong SQL to verify data and troubleshoot issues.
• Familiarity with HTML, CSS, JavaScript and browser developer tools.
• Understanding of RESTful APIs; experience with Postman or log viewers.
• Familiarity with AWS/Azure cloud architectures and SaaS apps.
• Experience using ServiceNow for enterprise support.

Responsibilities

• Diagnose, isolate, and resolve complex application errors and workflow issues.
• Write basic to intermediate queries to verify data and troubleshoot reporting.
• Review API payloads and logs to identify data exchange failures.
• Document troubleshooting steps and communicate with customers in tickets.
• Replicate and document defects for escalation to Product/QA teams.
• Create and maintain user-facing help articles and knowledge base content.

Skills

SQL

HTML

CSS

JavaScript

RESTful APIs

Postman

Splunk

Datadog

ServiceNow

Education

Bachelor’s degree in Information Technology, Computer Science, or MIS

High School Diploma + 10+ years experience

Tools

AWS

Azure

Postman

DevTools / Browser Inspect

Job description

MANTECH Software Application Support Engineer

General information

Requisition # R68493

Posting Date 06/08/2026

Security Clearance Required TS/SCI w/ Poly

Remote Type Onsite

Time Type Full time

Description & Requirements

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Software Application Support Engineer to join our technical support team in Chantilly, VA. In this role, you will be the dedicated technical expert for our custom software applications. Your primary focus will be assisting enterprise clients and internal users with complex software configurations, application errors, data inquiries, and integration workflows.

Responsibilities include but are not limited to:

• Diagnose, isolate, and resolve complex application errors, workflow interruptions, and software anomalies reported by users.
• Write basic to intermediate database queries to verify data integrity, investigate user-reported discrepancies, and troubleshoot reporting issues.
• Review and analyze API payloads, webhooks, and third-party integration logs to identify where data exchanges are failing.
• Own technical issues from initial report through to resolution by documenting detailed troubleshooting steps, customer communications, and root causes within the ticketing system.
• Replicate and document verified software defects with clear technical evidence (logs, reproduction steps, environment details) for escalation to the Product and QA engineering teams.
• Create and maintain user-facing help articles, FAQs, and internal knowledge base documentation regarding application features and updates.

Minimum Qualifications:

• Bachelor’s degree in Information Technology, or Computer Science, or Management Information Systems (MIS) or in equivalent technology degree and 4+ years of experience in a technical support role specifically supporting software applications, SaaS products, or web-based platforms or High School Diploma and 10 + years of experience.
• Strong foundational knowledge of SQL (or NoSQL) to query databases for data verification and troubleshooting.
• Familiarity with HTML, CSS, JavaScript, and browser developer tools (Inspect/Console) to diagnose front-end application behavior.
• Understanding of RESTful APIs and experience using tools like Postman or log viewers (e.g., Splunk, Datadog) to investigate application errors.
• Familiarity with cloud-based architectures (AWS, Azure) and how modern SaaS web applications function.
• Experience using enterprise support platforms such as ServiceNow.

Preferred Qualifications:

• Relevant technical certifications such as CompTIA A+, Network+, or Security+, or the ability to obtain a certification within 6 months of start date.
• Demonstrates a logical approach to problem-solving and an innate curiosity to figure out why an application is behaving unexpectedly.
• Excellent written and verbal communication, with the ability to explain technical workflows and workarounds clearly to non-technical users.
• Exhibits a strong desire to help people, showing patience and professionalism when dealing with frustrated users during critical software disruptions.

Clearance Requirements:

• Must hold an active TS/SCI clearance with Polygraph.

Physical Requirements:

• Must be able to remain in a stationary position 50%.
• Needs to occasionally move about inside the office to access file cabinets, office machinery, etc.
• Frequently communicates with co-workers, management, and customers, which may involve delivering presentations.
• Must be able to exchange accurate information in these situations.

MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.

If you need a reasonable accommodation to apply for a position with MANTECH, please email us at [e-mail] and provide your name and contact information.