Leadership Team

Our leadership team is committed to delivering on the vision of ASG: to create solutions that fuel business transformation and enable our customers to seize the opportunities of the Information Technology (IT) economy.

Executive Management


Sara Singh M.D, FAPA

President & Chief Executive Officer

Dr. Sara Singh is certified with American Board of Internal Medicine and American Board of Psychiatry and Neurology. She is an active member of Health Information and Management Systems Society. Dr. Singh has spent the majority of her professional career in senior leadership roles with health care organizations…

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Mandeep Singh PMP, CISM

Chief Operating Officer

Mandeep Singh, COO and CTO of A Square Group, is an ITIL expert and certified CIO. He excels in leading large organizations, particularly in healthcare and technology, towards modern and efficient structures. With a focus on enhancing care quality and transparency, he has successfully directed multiple government…

Senior Management


Jeff Turner, PMP, MBA

Vice President, Health & Federal Civilian

Mr. Jeff Turner is a seasoned Business Executive overseeing Federal contracts in Enterprise Architecture, IT, Program Management, and Partner Relations. With 25+ years of experience, he delivers full life-cycle IT solutions and manages programs for prestigious agencies. Formerly at Northrop Grumman, Jeff held…

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Larry Janeshek

Chief Information Security Officer

Mr. Janeshek ensures A Square Group’s information security. He manages strategy, cyber controls, threat management, and integration. With prior cybersecurity roles for corporate and government clients, he brings expertise as a former police officer and Army veteran, holding a Master’s in Cybersecurity from DePaul…


Lisa Carr, SHRM-CP, PHR

Director, Human Resources & Support Services

Lisa Carr is ASG’s Support Services director with 25+ years of HR expertise. She oversees operations and specializes in Employee Relations, Benefits, Recruiting, Compensation, and Process Improvement. She also manages facilities, IT support, payroll, and contracts.

7. Geoffrey Xiao

Geoffrey Xiao

Senior Vice President, Digital Transformation

Mr. Geoffrey Xiao is a seasoned leader in AI/ML-based SaaS solutions and MLaaS architectures. He co-develops technical strategies, maintains an innovative roadmap, and supports client modernization projects. With a background in software engineering and AI/ML-based products, Geoffrey holds an MBA and a Master of…

10. Anchulee Raongthum

Anchulee Raongthum, MBA-HCM, MSIDT

Director of Outreach, Education & Support

Anchulee Raongthum leads learning & development and empowers cross-functional teams to excel in healthcare outreach, technical support, and program innovation. With 15+ years of experience, she has a successful track record in business development, marketing, and program/project management for government health…

Gary Harmon - Vcie President, DHS and DoD Accounts

Gary D. Harmon

Vice President, DHS and DoD Accounts

Mr. Gary Harmon is a senior executive specializing in strategy, process/policy optimization, business development, and technology innovation. He has served in multiple executive leadership roles designing and executing high-impact strategic initiatives and programs that drove revenue growth and penetration…

Methta Tran

Methta Tran

Chief growth Officer, Business Developmenet

Methta Tran possesses a strong track record of leading and managing strategic initiatives across various federal agencies, especially in the healthcare sector. She brings a wealth of experience and expertise in business development, client relations, and program execution to her role at ASG.

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Patrick “Dean” Papa

Program Director

Mr. Dean has 20+ years of global business and technology leadership. He specializes in application and infrastructure consulting, transformation, modernization and migration, data center exit delivery, and cloud engagements. With expertise in government and Fortune 100 projects, Dean excels in strategy…

11. Zach Main

Zach Main, PMP

Program Manager

Zach has had a career that includes experience as a division director, program manager, and senior policy maker in government, and as an executive, program manager and independent consultant with IT and management consulting firms. These varied assignments, in addition to his…

Sheila Haines, PMP - Program Manager

Sheila Haines, PMP

Program Manager

Sheila Haines brings over 15 years of federal health expertise in agile project management, software procurement, security support, data analytics, and systems integration to her role at A Square Group, LLC. She oversees the cloud migration of Application Development Organizations, enhancements in efficiency and…

Karl Laubengayer, CISSP, ISSAP, ISSMP - Program Manager

Karl Laubengayer

Program Manager

Mr. Karl Laubengayer possesses 25+ years’ experience in the federal and commercial marketplace. He has been the customer, supplier and vendor to numerous Fortune 100 companies and the Department of Defense. Focused primarily on Cyber Security and Program Management, Karl has led …