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Leadership Team

Julieann Esper Rainville 1



Given her passion for better servicing caregivers in the post-acute care industry, Julieann joined the board of Viventium in 2023. Most recently, she also took over as interim CEO. She is an Operating Partner with Advent, working on the HCIT portfolio, and a Board member at Azalea Health. She has spent the past 26 years working in enterprise software, with senior executive roles at PointClickCare, Cyncly, and UKG (Kronos). Her earlier career was spent in venture capital at Battery Ventures and investment banking at Bank of America Merrill Lynch. Julieann has been named #1 in the Top 25 Women Leaders in Healthcare Software by the Healthcare Technology Report, was on the Woman of the Year by Women in IT shortlist, and received the Stevie Silver Award for Female Executive of the Year. In her free time, Julieann is an exercise enthusiast and avid reader, and her most active passion outside of work is being a soccer and swim mom to her four kids. 

Schools: Smith College, Harvard Business School



With over 25 years of experience as a forward-looking, entrepreneurial financial and operational executive, Mark’s background includes being the CFO for high-growth SaaS-based businesses that are VC and PE backed, and he is also a CPA. Recently, he led the successful acquisition of a SaaS-based wealth management company – twice – to two public companies. His goal is to institute the processes and procedures needed to create a decision-focused culture that drives accelerated growth and efficiency. When not working, Mark enjoys spending time with his family and four dogs and spending more time thinking about going skiing and playing golf than actually doing either.

Schools: Boston University



Terra has nearly 20 years of experience in the HCM industry in roles ranging from sales and sales management to training to marketing. Terra truly believes in the Viventium lifestyle and that being “In It With You” extends beyond the walls of the Viventium offices. Going by the adage that “you are the average of the five people you spend the most time with,” she strives to surround herself – and the company – with the best people. Terra realizes the potential in her employees, and in the way she creates a fun and balanced work environment to nurture their growth and success, she makes her employees want to work with her.

Schools: Ursinus College, Fairleigh Dickinson University



Abe was the first of the Kohn sons to join the company back in its early years. He has overseen the company’s technology development efforts since 1992. We have him to thank for developing the architecture of our current software and core processing technology. Abe’s dedication has led the Viventium development team from, quite literally, a team of one to what it is today.

Victor Williams


Victor sees every problem as an opportunity to improve. Victor has more than 30 years of experience within IT helping small, medium, and large organizations integrate security and automation into their business processes, and he has spent 18.5 years in the elections space supporting and creating products that support the democratic process in the United States. Driving efficiencies and the synergy of people, process, and technology are the foundation of what he does, and he believes, as Winston Churchill once said, that “Success is not final, failure is not fatal – it is the courage to continue that counts.” When not working, Victor enjoys spending time with his family, playing softball and basketball, reading, and working in the yard.

Schools: University of Nebraska-Lincoln



With over 30 years of experience leading operations and implementation teams, Howie brings a history of creating not only truly high-performing teams but also organizational cultures that are focused on helping our people and our clients succeed at the highest level. Throughout his career in administration and consulting around benefits and HR, Howie has played every role from day-to-day operations to corporate CIO. These experiences have helped Howie understand what it takes to provide remarkable service from all vantage points. Howie realizes that operations and implementation work is hard and stressful, so it is important to also find time to have fun. He tries to bring some comic relief to his meetings and often makes pop cultural references to movies, books, or songs that are usually only understood by his wife. 



Helaine has spent over 25 years leading human resources in publishing, media, and non-profit companies. She has a wealth of experience in benefits, HRIS, employee relations, talent acquisition, DEI, and learning and development. She believes in the power of building trusting, strong, and long-term relationships with employees and leadership. Her specialty is in crafting innovative employee benefit and development programs, and she enjoys watching employees grow! When not working, Helaine enjoys spending time with her family and playing pickleball.

Schools: SUNY Albany



Alex has spent her entire career in the HCM space in roles ranging from sales to training to sales management. She loves collaborating with prospects and clients by leveraging technology to help streamline their payroll and HR operations. Alex always focuses on helping businesses improve their workflows so they can get back to the most important aspects of running their business – their employees and their clients. When it comes to leadership, Alex subscribes to what philosopher Albert Schweitzer once said: “Example is not the main thing in influencing others. It is the only thing.” She is not afraid to dive into any and all projects that make her team better.

Schools: Lynn University



In his 15 years with the company, Zishe has undertaken roles ranging from service to implementation to product management. He applies his practical knowledge from his payroll administrator days to every project. As the CPO, Zishe stands firmly behind our software and truly believes that there is nothing the Development Team can’t do. Zishe brings not only an energy to every project but also the conviction that each project will work.


VP, Research & Development

Simon is a Russian born, Israel raised, United States dwelling software guru who brings his experiences in system architecture, quality management, and software engineering to his leadership of the development team. Along with our CTO, Abe, we consider Simon to be the brains behind the Viventium technology. Software security is a personal favorite of his; he holds multiple patents in mobile security and has also presented at numerous security conferences. Simon doesn’t seem to understand the phrase, “It’s not possible,” a fact evident not only in his achievements but also in the way he approaches work.

Schools: The Academic College of Tel-Aviv, Yaffo


VP, Operations

Nicole is an experienced and innovative leader in the payroll industry, overseeing all aspects of client service and implementation experiences. She has a passion for people and bettering our clients’ investment with Viventium and cultivates a culture of improvement, empowerment, and collaboration between our associates and our clients. Always “In It With You,” Nicole is solution driven and believes “Imagination is everything. It is the preview of life’s coming attractions.” – Albert Einstein

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