Senior .NET Systems Architect Developer - TS cleared

Bart & Associates, Inc.; North Charleston (SC); On-site; USD 110,000 - 160,000; Full time

Benefits offered by this job

Premium medical plan

Tuition assistance

Transit benefits

Virtual exercise platform

Job summary

Bart & Associates, Inc. seeks a Senior .NET Systems Architect / Developer to support a federal program within a legacy tech environment. The role focuses on maintaining, enhancing, and stabilizing systems while enabling data movement and integration across platforms.

The ideal candidate has strong .NET/C# development skills, experience with legacy COBOL/mainframe components, and a proven ability to improve deployment workflows and interoperability. Active Top Secret clearance expected.

Qualifications

• Bachelor’s degree or equivalent experience.
• 5–8+ years in software development or system architecture.
• Strong experience with .NET Framework / .NET Core and C#.

Responsibilities

• Support development and maintenance of .NET/C# applications in a legacy environment (MS Visual Studio).
• Stabilize and coordinate development and production environments with stakeholders.
• Design data movement/integration solutions across multiple platforms.
• Analyze existing systems (including mainframe components) and propose enhancements.
• Support ETL processes and data modeling for reliable data flow.
• Collaborate with federal staff, vendors, and internal teams for continuity.

Skills

NET Framework/.NET Core

C# development

Visual Studio

SQL Server (MS SQL)

Data integration/ETL

Legacy systems/Cobol

System integration

Communication & collaboration

Education

Bachelor’s degree in CS / IS / Engineering

Job description

Senior .NET Systems Architect / Developer

At B&A, we foster and embrace a distinct set of values that we live by and instill in all aspects of our organization: dedication, commitment, partnership, trust, and recognition. We have incorporated these values into successful delivery for our customers since 1988. B&A believes in ensuring its employees feel deeply connected to B&A, recognizing successes and hard work, and providing continuous opportunities to learn and grow. Our people are entrepreneurial thinkers that combine mindset, vision, and experience to drive value – not only to us as an organization, but to the clients we support. We promote a collaborative culture with our clients, and with each other, as one team working towards a common vision. We’d love for you to join our team!

Description

We are seeking an experienced Senior .NET Systems Architect / Developer to support a federal program operating within a legacy technology environment while supporting ongoing system enhancements and integration efforts. This role focuses on maintaining, enhancing, and stabilizing existing systems while contributing to incremental improvements in system architecture, data integration, and development processes. The ideal candidate will have strong experience in .NET/C# development, familiarity with legacy systems, and a demonstrated ability to support data movement and integration across multiple platforms. This role will also contribute to improving development and deployment workflows, including supporting environment setup and system interoperability.

Responsibilities

• Support development and maintenance of .NET/C# applications within a legacy system environment using Microsoft Visual Studio.
• Assist with establishing and stabilizing development and production environments, including coordination with stakeholders to address setup, configuration, and deployment challenges.
• Design and implement data movement and integration solutions across diverse platforms (legacy systems, databases, and modern tools).
• Analyze existing systems (including COBOL or mainframe components) and recommend practical enhancements to improve performance, reliability, and maintainability.
• Support data modeling and ETL processes to ensure consistent and reliable data flow.
• Collaborate with federal staff, vendors, and internal teams to support continuity of operations and technical alignment.
• Contribute to system and network architecture discussions, including connectivity and performance considerations.
• Support evaluation and application of modern tools and technologies, where appropriate, to enhance data processing and analytics capabilities.
• Identify opportunities to improve efficiency and scalability within existing system constraints.
• Assist with documentation, knowledge transfer, and system continuity efforts.

Education and Experience

• Bachelor’s degree in Computer Science, Information Systems, Engineering, or equivalent experience.
• 5–8+ years of experience in software development and/or system architecture.

Required Qualifications

• Strong experience with:
  • .NET Framework / .NET Core
  • C# development
  • Microsoft Visual Studio development environments
  • Oracle and/or Microsoft SQL Server (MS SQL)
• Experience with data integration, data movement, or ETL processes.
• Familiarity with legacy systems, including COBOL or mainframe environments.
• Experience troubleshooting and supporting development and deployment environments.
• Understanding of system integration and distributed systems.
• Strong communication and collaboration skills.

Preferred Qualifications

• Experience working in federal or highly regulated environments.
• Familiarity with modern data platforms, including Databricks or similar technologies.
• Experience with data modeling and database design.
• Exposure to cloud platforms (Azure, AWS, or similar).
• Basic understanding of network architecture and system connectivity.
• Exposure to AI/ML or advanced analytics tools.

Certifications (Preferred)

• CompTIA Security+ (or equivalent baseline certification)
• CompTIA Network+
• Microsoft Certified: Azure Fundamentals or Azure Solutions Architect
• Databricks Data Engineer Certification (desired)
• ITIL Foundation Certification

Key Attributes

• Strong problem‑solving mindset in bridging legacy and modern systems.
• Practical, detail‑oriented approach to system stability and incremental improvement.
• Ability to work effectively in structured environments with evolving requirements.
• Collaborative approach across government, contractor, and vendor teams.
• Commitment to documentation, knowledge sharing, and operational continuity.

Security Clearance

Active Top Secret clearance. Able to obtain TS/SCI.

Notable Clients

B&A serves Department of Justice, Department of State, FDA, Army, federal, state, local government, private sector, and higher education.

Benefits and Programs

B&A offers full‑time employees 100% premium paid medical plan options covering medical, prescription, dental, vision, life insurance, AD&D, disability, Teladoc, and accident insurance. Employees enjoy paid time off, tuition assistance, sponsored trainings and certifications, commuter transit benefits for DC Metro employees, and free subscription to a virtual exercise platform (NEOU). B&A focuses on employee engagement, wellness, and assistance through programs such as B&A Cares, mentorship, job shadowing, brand ambassador, Lifeworks EAP, monthly virtual events, and an annual wellness challenge.

EEO

B&A provides equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state and local laws. B&A participates in e‑Verify and complies with all non‑discrimination statutes in each location of operation.