Meet Marathon CFO Leadership Team

Not your average CPAs.

Jim Elgart, CPA

Founder, Partner, CEO


​A fisherman can always spot another fisherman from afar. And Jimmy Elgart can spot a self-starter with big ambitions because he’s one himself.

MarathonCFO Founder and CEO Jimmy Elgart is a CPA who’s spent more than 20 years as an accounting and business development manager, with more than 10 years as a corporate CFO of leading entrepreneurial ventures in life sciences, advertising, franchising and professional services.


Originally founded in 2011 and focused on Boston, Jim has seen his unique business model catch on and spread it's wings from Seattle, to Los Angeles, to North Carolina, to Minneapolis, to Manhattan and Brooklyn, to the US Virgin Islands, to St. Petersburg, Russia. 

Jim has extensive experience in establishing and managing dynamic, mid-market businesses. From Accounting and Budgeting to HR and Recruitment, to Tax Planning, International Expansion, and M&A, Jim has led and mapped financial strategies for companies across several business sectors. 

Prior to founding Marathon CFO, Jim served as the CFO of the ad agency Cambridge Biomarketing, helped develop the international footprint of the retail consulting firm Gordon Brothers, and was a key member of the franchise practice at the public accounting firm Gray, Gray, and Gray. 


Additionally, Jim has been a founder, investor or principal in multiple enterprises.   He earned a B.A. from Boston University, and an M.B.A. and M.A. in Latin American Studies from Tulane University. 

Mark Werling

Partner, CFO/COO

San Francisco Bay Area

"When you know you're destined for greatness, your potential haunts you. It keeps you up at night. You won't feel complete until you succeed." 

Mark joined the practice in early 2017 and is fanatical about helping entrepreneurs unlock the value in dynamic businesses and help them to navigate through high growth and key transition points in their business life cycle. Progressive experience in finance and operations management within start-ups, turnarounds, private equity backed ventures, Fortune 100 companies, and franchise-based enterprises. 


Demonstrated ability to streamline business operations that drive growth, increase efficiency and drive positive EBITDA. Strong qualifications in developing and implementing financial controls and processes, human resource management, securing financing, implementing new ERP systems, and facilitating change management.  

In offering critical assistance to entrepreneurial companies, Mark works directly with company management to help stabilize both financial and operational performance by developing and implementing comprehensive profitability and working capital plans. Mark’s team oriented and consensus building approach provides a leadership synergy that fosters break-through idea generation and execution.


Mark’s past experience includes:


  • CFO of a private equity backed ecommerce/multi-channel luxury home goods retailer. Shifted the company strategy to prioritize the ecommerce channel, eliminated lower margin channels and optimizedthe cost structure. Transitioned HR and benefit administration to a 3rd party professional employer organization (PEO) and launched the Company 401k plan. Led the move from an internally managed distribution center to an outsourced 3rd party logistics (3PL) company. 


  • Senior Consulting Manager of California’s largest regional CPA firm, BPM. Served as the interim CFO/controller for various clients in different stages of significant transition until the company returned to a steady state of operations or a permanent hire was found. Included in this was the refinancing of lines of credits, asset-based loans, capital and operating leases. Mark has served as an expert witness in the United States Bankruptcy Court on behalf of the Debtor in a Chapter 11 bankrupcty case.


  • Business Analyst with LifeScan, a Johnson & Johnson Company, supporting the sales and marketing channel. Responsibilities included preparing strategic planning models, supporting new product development, creating department and divisional budgets and helping to develop overall marketing strategy.


  • Mark’s early career was spent auditing companies with both BPM and Deloitte in a variety of industries including consumer products, medical devices, wineries, technology, real estate, non-profit organizations, and included an overseas assignment in Sydney, Australia.


Mark has an M.B.A. from University of Notre Dame, and a B.S.C. in Accounting from Santa Clara University. Overseas travels included an MBA internship in Cape Town, South Africa and a study abroad program in Vienna, Austria.

He is also a CPA in the State of California and has received the Certified Valuation Analyst (CVA) and Certified Insolvency Restructuring Advisor (CIRA) certifications.

Mark entrepreneurial interests include early investments in an innovative social media platform, an eCommerce retailer, and virtual CFO advisory practice.  

"Do sharks complain about Monday? No. They're up early. Biting stuff, chasing things. Being scary - reminding everyone they're a ferocious shark." Be the shark.

Janelle Thunhorst

Accounting Manager

Janelle recently joined MarathonCFO in December of 2017 as Accounting Manager. 


Janelle is a reliable and motivated accountant with over 19 years of experience in accounting and taxes in both the private and public sectors.  Her experience spans all phases of the accounting cycle., including payroll, accounts receivable and payable, weekly cash-flow analysis, database management, tax preparation and audits.  she has high technical proficiency that includes expertise with array of software products.


Janelle has excelled in implementing accounting system automation while serving as Accounting Manager, controller and CFO for a variety of small and medium-sized businesses including a high-volume online retailer, a fast-paced online marketing and personal growth company, and may others.  Demonstrating her versatility, she was once involved in creating systems and procedures that granted an electronic security company its ISO certification.  She has also worked on audit and tax planning teams for large, well established organizations.


Janelle earned a Bachelors of Science in Global Business, with a Financial Management concentration from Arizona State University. 


Gigi Murphy

Office Manager

Gigi has been serving as MarathonCFO's Office Manager since July of 2017. 


Gigi is the front line of support for MarathonCFO and our clients.  Her can-do attitude, quick response and attention to detail make her a major assets to our organization.  Gigi brings with her over 20 years of office management, bookkeeping and administrative experience. 

Gigi received her Business Degree from Bridgewater State University.


Katie Barisic 


Katie joined MarathonCFO in 2018 as an Accounting Associate. 


Katie has over 4 years experience with accounts receivable and accounts payable.  She is an independent thinker and has proven her win-win attitude over the 10 years she has worked in conflict resolution. 


Katie is certified in both QuickBooks Online and and is currently perusing her accounting degree.


Ben Fountain


Ben joined MarathonCFO in February of 2016 as an Accounting Associate. 


Ben is responsible for managing all aspects of  client service operations.  Ben is a graduate of Suffolk University and was formerly a member of the accounting and finance team at