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About Tantus Tech

Our Vision

To Make Our World Better by enhancing the ability of citizens to access government services that ensure, sustain, and improve their quality of life.

Our Mission

We combine innovative technologies and modern working methods to achieve results that positively impact citizens and their communities by collaborating with the government to create efficient, easy to use, citizen-centric solutions.

Leadership Principles

Our four executives, Buck Keswani, Karlene Stecchi, Rhian Thompson, and Raj Nair are proud to represent diverse backgrounds and skill sets. They believe in providing all of our team members with the opportunities and support they need to thrive professionally. Their leadership is driven by their call to serve—serve their employees, serve their communities, and serve their nation.

Our Leadership


Buck Keswani

Chief Executive Officer

Buck Keswani grew up in a large Indian-Chinese family in Vienna. With all of his extended family members living on the same street, he was always surrounded by people and grew to appreciate the importance of human connection. His parents, who were also business owners, told him to “never start a business.” With that in mind, Buck founded Tantus Tech.

Buck’s desire to start Tantus Tech stemmed from a recurring feeling of disconnect in delivery after his experiences working with other companies. He believed that clients deserved more: more passion, more attention, and better pricing. He knew that he could do things better, and after receiving project requests from ex-colleagues, he did.

Buck strongly believes in doing the right thing. And, to the best of his abilities, strives to treat everyone fairly, maintain his personal and professional integrity, and make a positive difference in the world.


Karlene Stecchi

Executive Vice President

Since joining the Tantus team in 2009, Karlene Stecchi has been the driving force behind Tantus Tech’s growth strategy and corporate operations. Now the EVP, Karlene is dedicated to bringing Tantus Tech’s vision to life with every client and employee interaction. She is committed to developing the next wave of Federal contracting leadership - and is actively involved in ACT-IAC. Karlene has served as Industry Chair for the Voyagers Leadership Program in 2020, Industry Vice Chair for their inaugural Associates's Program, and currently serves as Industry Vice Chair for the Voyagers 2021 class.

As a mother of two young sons - you can also catch Karlene cheering on her children at the local skatepark. She is passionate about volunteering and - drawing from her own early childhood experiences, Karlene seeks to work with organizations that support children experiencing the effects of poverty, specifically children in the foster care system.


Rhian Thompson

Chief Operating Officer

Rhian Thompson is an experienced Chief Operating Officer with a demonstrated history in the Information Technology and Consulting Services industry.

Rhian is a versatile and seasoned professional in her field and holds a Masters in Management of Information Technology from the University of Virginia. She is skilled in business process and process design, alignment, portfolio management, organizational change management, requirements analysis, and enterprise software.

ِAlong with being a business development professional, Rhian seeks to create positive change in the lives of those around her. She is a strong advocate for marginalized communities, minorities, and women in business.


Raj Nair

Chief Financial Officer

Before taking the CFO role in October 2017, Raj was involved with Tantus Tech in multiple capacities since 2006. Raj will be leading the company’s finance strategy, budgeting and planning, accounting, financial reporting, treasury, tax, and contracts administration. Raj has over 25 years of leadership level experience in the GovCon sector. He is also the proud father to three daughters and loves spending time with his family.


Natalia Slasinski

Talent Acquisition Manager

Natalia has proven experience in managing the full life cycle of talent acquisition strategy, which includes short and long term recruitment planning, resource allocations, onboarding, and hands-on management of the recruiting team. Since joining Tantus, Natalia has developed and implemented recruitment plans, met with hiring managers to discuss hiring needs, and built trust within hiring managers and recruitment staff. Natalia is a seasoned professional in talent management who holds a Bachelors of Science degree in Psychology and Social Services from the Babes-Bolyai University in Cluj-Napoca, Romania. Her experience led her to D.C. where she was Senior IT Recruiter at Infinity Technology, LLC., and Senior Team Lead at eGlobalTech. She has a proven track record for strategizing, sourcing, screening, and delivering high quality and engaged talent within a fast-paced work environment.

Join our team

Leadership is never about the leader. It’s about the people you lead.

Karlene Stecchi - Executive Vice President