VistA​/MUMPS Sustainment Subject Matter Expert

The Squires Group is seeking a VistA/MUMPS Sustainment Subject Matter Expert (SME) to provide senior-level technical expertise supporting the sustainment, maintenance, and production operations of VistA-based applications. This role will serve as a technical resource for diagnosing and resolving complex production issues, leading root cause analysis, supporting defect resolution, and ensuring application stability and release readiness.

The ideal candidate will have significant hands-on experience with VistA and MUMPS, strong knowledge of VistA technical architecture and data structures, and a proven track record supporting legacy, mission-critical healthcare systems in production environments.

• Provide expert technical guidance on VistA and MUMPS-based application sustainment, maintenance, and operations.
• Analyze, triage, and resolve complex VistA defects, incidents, service requests, and production issues.
• Perform root cause analysis across application code, data, configuration, workflow, interfaces, and technical environments.
• Provide Tier 2 and Tier 3 production support, including incident prioritization, escalation, workaround identification, and resolution planning.
• Develop and review defect resolution plans, including remediation approach, code and data impacts, testing strategy, release considerations, and rollback planning.
• Support application testing, validation, release readiness, deployment planning, and post-release monitoring.
• Collaborate with developers, testers, product owners, release managers, operations teams, and government stakeholders to resolve technical issues and maintain application stability.
• Identify opportunities to improve sustainment processes, defect prevention, monitoring, backlog management, documentation, and knowledge transfer.
• Provide technical recommendations regarding application maintenance, data correction, configuration, and system performance.
• Document technical findings, root cause analyses, resolution approaches, and knowledge gained from production issues.
• Support modernization and continuous improvement efforts where legacy VistA functionality, architecture, or processes are being enhanced or transitioned.

• Significant hands-on experience supporting VistA sustainment, operations, maintenance, or modernization.
• Strong knowledge of MUMPS programming and VistA technical architecture.
• Experience working with VistA routines, globals, File Man, data dictionaries, cross-references, and package dependencies.
• Proven ability to diagnose and resolve complex production defects within legacy or mission-critical systems.
• Experience providing Tier 2/Tier 3 application support, ticket triage, incident management, and defect resolution.
• Experience working within structured software development, testing, release, and change management processes.
• Strong analytical and problem-solving skills, with the ability to conduct root cause analysis across code, data, configuration, interfaces, and environments.
• Excellent written and verbal communication skills, including the ability to explain complex technical issues to both technical and non-technical stakeholders.

Preferred Qualifications

• Prior experience supporting Department of Veterans Affairs (VA) systems or federal healthcare platforms.
• Familiarity with VA product-line delivery models and federal application sustainment practices.
• Experience with release management, Agile, Dev Sec Ops , and federal compliance requirements.
• Experience with application monitoring, root cause analysis reporting, data correction, table maintenance, or legacy system modernization.
• Experience collaborating with government stakeholders and cross-functional technical teams in a federal environment.

• W2 Hourly rate starts at $90+/hour. Pay rates are based on experience and qualifications, and are subject to change at any time.
• Benefits vary by compensation type and may include paid time off (PTO), medical, dental, and vision coverage, life insurance, long-term disability insurance, a 401(k) plan, and additional optional benefits.

4 Reasons to Join The Squires Group, Inc.:
1. Our Commitment to You - We offer competitive pay, multi-year projects, and a list of exciting clients.
2. Work-Life Balance - We work hard; we work smart and have quality time for family and "life."
3. Golden Rule - We treat our consultants the way we want to be treated: with integrity, professionalism, and trust.
4. We Care About You – We help you meet your career goals and continuously support your efforts in the field.

Check out our Referral Program!
The Squires Group will pay you for every qualified professional that you refer and we place. If you see a position posted by The Squires Group and know the perfect person for the job, please send us your referral. For more information, go to .

The Squires Group, Inc. is an Equal Opportunity/Affirmative Action Employer.

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