Avyance Advantage

Organizations must adopt modern technologies, streamline operations, and empower their workforce to stay competitive and mission-focused. At Avyance, we help organizations cut through complexity, harness automation, and build smarter processes that empower their teams to focus on what matters most—delivering lasting impact across federal, commercial, and nonprofit sectors.

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Our Core Values

Our core values are more than words—they underpin how we think, work, and lead.

Excellence

We exceed expectations and deliver impact. We are continuous learners, always working to improve ourselves and our skills. We work efficiently and effectively.

Creativity

We look for solutions that are outside-the-box. We are courageous and take on challenges. We find ways around roadblocks and know to expect the unexpected.

Teamwork

It's all about the team. We boost each other up, partner with our clients, hold ourselves accountable, and show up as one Avyance. We encourage and recognize our colleagues.

Trust

We treat everyone with respect and dignity. We reinforce our credibility through honest communication, empathy, and authenticity. We deliver on our commitments.

These values drive our commitment to excellence, fuel our partnerships, and empower us to deliver lasting impact for our clients and their missions.

Meet Our Leaders

Sarah Jeppesen

Sarah Jeppesen

Founding Partner and Chief Executive Officer (CEO)

Sarah has decades of experience designing and implementing large-scale transformation efforts, combining business needs with a focus on the human side of organizations. She leads teams large and small in delivering innovative and realistic solutions for client challenges, and is dedicated to building teams and workplaces that value diversity and developing people's talents. Sarah enjoys traveling, cooking at home, and is a big William and Mary fan.

Tatiana Jeromskaia

Tatiana Jeromskaia

Founding Partner and President

Tatiana is an experienced executive known for driving business and client success, supporting efforts from strategy development through implementation. She has happily tackled some of her clients' most complex challenges, from the development of a new tax system to product deployments and facility consolidations, to international business strategy, and more. Outside of work, Tatiana takes pleasure in travel, languages, and watching her daughter compete in gymnastics.

Andrea Kiernan

Andrea Kiernan

Vice President, Organizational Effectiveness

Andrea is an Organizational Effectiveness Leader with a passion for all things people. Her expertise in organizational change management, communications, training, leadership development, and program management allows her to build meaningful, trusting relationships with clients and colleagues at all organizational levels. In her free time, Andrea enjoys volunteering in her local community, being outdoors, and spending time with her family.

Lara Van Nostrand

Lara Van Nostrand

Principal

Lara has almost 30 years of experience developing and delivering learning and communication solutions. An engineer by degree, Lara's education and experience help her serve as a bridge between engineers and strategic communicators. As a Certified Technical Trainer (CTT) and Change Management (PROSCI) practitioner, Lara has a systematic and organized style for creating "on-point" client solutions that inspire successful outcomes. Outside of work, Lara enjoys travel, Caminos (aqua and terra), and trees.

Stephen Berry

Stephen Berry

Principal

Stephen brings nearly 20 years of global experience solving complex challenges. He honed his skills in strategy development and execution, project and program management, and process improvement across people, technology, and heavy infrastructure projects throughout the UK, Australia, and US. In his free time, Stephen is working towards his private pilot’s license, loves pizza and British chocolates, and enjoys spending time with his wife and rescue dog, Poppy.