Meet our leadership

Mark Simner, CEO of TMA Systems is originally from the United Kingdom and has also lived in Germany, the United States and most recently Canada. He holds dual US and UK citizenship and began his education in England, earning qualifications as an Associate Chartered Management Accountant and also a Chartered Global Management Accountant. In the US he attended New York University where he graduated with a Master of Business Administration in Finance—with distinction. He has more than 20 years of experience in growing and scaling SaaS, technology and financial service companies globally and brings deep operational and strategic skills to his role as Chief Executive Officer at TMA Systems.

Prior to joining TMA Systems, he was COO and CFO of Silversmith Capital portfolio company Absorb Software, was CFO at TCV backed portfolio company Varsity Tutors (now listed on the Nasdaq as “Nerdy”) and was also CFO of an American Express owned SaaS Company called Accertify.

Having spent time working in ten different countries, Mark’s a true globetrotter that brings vibrancy and a love of adventure to his work at TMA. From skiing in the Canadian mountains to spending time with his family, his travel bug grants a fresh perspective in both client and internal relationships. Mark will continue to ensure that TMA delivers an industry-leading platform and client experience at every single touch point. He can be contacted at mark.simner@tmasystems.com.

Greg Shell, Chief Operations Officer, is originally from Knoxville, Tennessee, but has lived in the Tampa, Florida area since 1992. He graduated Summa Cum Laude from Florida State University with a Bachelor of Science in International Business and Finance and a minor in Chinese. With nearly 30 years of technology and services experience, Greg brings expansive strategic vision, collaborative leadership, and vast operations knowledge to the company. Specifically, he has spent the last 15 years growing and scaling SaaS based technology companies.    

Prior to joining TMA, he was the Vice President of Client Success of Silversmith Capital portfolio company Absorb Software, Vice President of Professional Services at eLogic Learning, and Senior Manager in the consulting divisions of Deloitte and Arthur Andersen.  

At TMA, Greg leads all post-sale, client-facing departments, including Professional Services, Client Support Services, Client Success, and the RiskPartner COI team. He works closely with other business divisions to support continued growth of the WebTMA product while maintaining TMA’s client success initiatives. He can be contacted at greg.shell@tmasystems.com.

Mike Hill, Chief Technology Officer, is originally from Williams Lake, British Columbia. He graduated from the University of Victoria with a Bachelor of Science (BSc) focused in Computer Science. With over two decades of enterprise software experience, Mike brings a strong technical background and extensive vision to the ever-changing CMMS/EAM industry. Prior to joining TMA, he was the Senior Director of Engineering at Varsity Tutors, a Nerdy company, which provides a learning platform to seamlessly connect learners to experts.

Mike is responsible for leading the TMA engineering team, modernizing processes to drive technology expansion and managing the product roadmap with innovative scope. He can be contacted at mike.hill@tmasystems.com.

Sarah Esteverena, Chief Marketing Officer at TMA Systems, resides in the Boston area of Massachusetts. With more than 20 years of marketing experience, Sarah is responsible for driving TMA Systems’ marketing strategy and brand growth. Sarah has held marketing leadership roles at Acceleration Partners, Cognizant Technology Solutions, Absorb Software, and Dentsu International.  Sarah also serves on the board of advisors at Flare Education, a Boston nonprofit focused on providing mentorship and career readiness skills to students in underserved high schools. Sarah is passionate about delivering marketing that provides exceptional value and top-notch customer experience.

Al Kinnear, Executive Vice President of Sales of TMA System is originally from Winnipeg, Manitoba. Al attended The University of Manitoba and graduated with a Bachelor of Commerce (Honors).  After graduating, Al pursued a Certified Public Accountant designation and moved to Calgary, Alberta Canada where he resides today with his wife Susan.

With over 2 decades of experience as a sales leader, Al is dedicated to driving growth and exceeding sales targets via focused efforts relating to the buyer’s journey and sales enablement within the sales operations he leads.  Al’s leadership style has excelled in creating collaborative and innovative sales environments where the focus on creating unmatched value for clients is paramount.

Prior to joining TMA Systems, Al was the sales leader at Absorb Software for 15 years where he worked with Silversmith Capital Partners and WCAS as the capital partners of Absorb.

Al loves to spend time in the outdoors, as an avid downhill skier and fly fisherman spending most weekends in Fernie, British Columbia.

Steve Min, VP of Finance and Corporate Development, is originally from New York City. He received his MBA from the MIT Sloan School of Management and AB from Harvard University.  Steve has over 25 years of experience in corporate finance, investment banking and consulting.

Prior to joining TMA Systems, Steve worked for companies including IBM, Bank of America, Credit Suisse, Scientific Games, and Harry’s.

Steve is responsible for leading financial strategy, planning, and operations. He also oversees corporate development initiatives and human resources at TMA Systems. He can be reached at steve.min@tmasystems.com.

John Swofford, VP of Sales at TMA Systems, is originally from Tulsa, Oklahoma. He graduated from the University of Tulsa with a Bachelor of Arts in Political Science. He joins TMA with over 17 years of experience in managing Fortune 500 companies’ sales teams in telecommunications and industrial distribution.

John is responsible for the day-to-day management of the sales department. He can be reached at john.swofford@tmasystems.com.

Don Wildauer, GM, Prime & Global Partnerships, Prime Technologies at TMA Systems is originally from Cherry Hill, New Jersey, but has resided in the Valley Forge, Pennsylvania area for many years.  He received a Bachelor of Electrical Engineering and Minor in Mathematics from Villanova University and holds a Master of Management in Business Administration from Pennsylvania State University.  Don brings more than 30 years’ experience leading and growing global technology businesses.  Prior to joining TMA Systems in 2022, he served as Senior Vice President at Prime Technologies.

Don is responsible for Prime Technologies’ calibration management software sales, services, customer success, technical support and quality system.  He can be reached at don.wildauer@tmasystems.com.

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Adam Deatherage, Vice President of Operations at TMA Systems, is originally from Tulsa, Oklahoma. He graduated from the University of Colorado with a Bachelor of Arts in Public Relations. With over 15 years of experience in software consulting and personnel management, his experience at TMA has included roles in Client Support, Professional Services, Consulting, and Sales. Adam is primarily responsible for the management of Implementations, Consulting, Migrations, and Technical Services within the Professional Services organization.

Jenny Pino, Director, Client Success at TMA Systems, resides in Tulsa, Oklahoma where she has resided for over 40 years. Jenny is a long-time veteran with TMA Systems with over 2 decades of experience serving customers and solving problems for them. Jenny has experience in the client experience from initial sale to the ongoing support process. Her experience at TMA includes roles in Client Support, Quality Assurance, Professional Services, Solutions Engineer, and Client Success. In her current role, Jenny is responsible for the day-to-day management of Client Support Services, Client Success Management, and WebTMA Administrative Services. She can be contacted at jenny.pino@tmasystems.com.

Dan Wolfe oversees TMA Systems’ flagship product, WebTMA, while providing support and strategic guidance across the organization’s product portfolio. He collaborates with cross-functional teams to align with the company’s goals and vision.

With over 20 years of experience in software engineering and technical leadership, Dan has built and led high-performing teams, driving digital transformations and modernizing system architectures. He co-founded and managed a consultancy business, delivering innovative solutions to public and private sector clients. As a former Chief Technology Officer, Dan successfully transitioned product development from third-party vendors to internal teams and established engineering practices that prioritized quality and performance. He has held leadership roles at WRKOUT Media Ltd., NTT DATA Services, and Varsity Tutors overseeing complex integrations, developing technical roadmaps, and championing agile and DevOps practices.

Dan is passionate about fostering collaboration, enhancing operational efficiency, and creating impactful software solutions that enable organizational success. He can be reached at dan.wolfe@tmasystems.com.

Maggie Zieba joined TMA Systems in May 2022, bringing more than a decade of experience in all areas of financial planning, analysis, and office administration.

Throughout her career, Maggie has developed and integrated processes and procedures in alignment with finance function that impact efficiency and positively affect bottom-line productivity. With a strong combination of software knowledge, CPA credentials and proven leadership skills, she has built effective processes and driven growth at the financial level for NAI Hiffman, CDK Global, Bluff City Materials and Cleo.

As TMA's VP Global Controller, she leads a team focused on M&E deals execution and integration, enhancing internal and external reporting, and support to leadership team. Passionate about increasing efficiency and reducing operational costs, Maggie is a key stakeholder in strategic planning for business growth and new acquisitions.

Outside of work, Maggie enjoys diving, snowboarding, and hiking.

Lesli Amos joined TMA Systems in May 2024, bringing over a decade of expertise in sales, marketing, and revenue operations. Originally from the Kansas City metro area, she moved to Boston to attend Boston University, where she graduated with honors in Sociology and Psychology. She has called the area home ever since. As the Senior Director of Revenue Operations at TMA, Lesli leads the marketing and sales operations and enablement teams, partnering closely with leadership to bring go-to-market strategies to life.

Lesli’s career spans diverse leadership roles in high-growth organizations, where she has consistently driven operational excellence and revenue growth. Prior to joining TMA, she led marketing and revenue operations teams at Acceleration Partners and Absorb Software, a former Silversmith Capital portfolio company.

Lesli is passionate about aligning cross-functional teams, leveraging data to deliver actionable insights, and creating scalable solutions that empower organizations to thrive.

Outside of work, Lesli enjoys spending time with her husband, James, and their energetic beagle mix, Joey.

Joe McVay has served in various roles at TMA Systems including Senior Implementation Consultant, Product Manager, and is now the Director of Solutions Engineering. Joe has over 14 years of experience in CMMS and EAM applications spanning verticals such as Higher Education, Healthcare, Public Sector, and Manufacturing.  

Joe is responsible for leading technical demonstrations of our product offerings and assisting our Engineering department with new development initiatives. Joe can be reached at joe.mcvay@tmasystems.com.