Who We Are


With over twenty years of experience as a tax attorney and accountant and founder of Cain Advisory Group (CAG) Brian Cain provides tax preparation/planning and financial consulting for small businesses, entrepreneurs and individuals. 


Outside of work, Brian loves to travel and see as much of the world as possible with his beautiful wife Sandra and two daughters. Recently the family enjoyed a three-year stay in Italy, where Sandra was stationed as a civilian attorney for the US Navy. During that time, he and his family visited over 26 countries! Brian continued to work remotely from Italy.  A good amount of travelling was required to guarantee ongoing service for his clients.  During the second year in Italy, he took 9 trips back to the US! That’s over 57,438 miles! 


Brian returned to San Diego in January of 2020 and his family joined later that year.  Sandra is currently head of the legal office at Navy Region Southwest and his daughters are busy in school and being teenagers!

Meet the Team!

Mary Vanston – Mary is a Certified QuickBooks Advisor and has been in accounting for over twenty years. She is a long-time member of Brian’s team serving his clients as the full charge bookkeeper. When Mary is not working, she is “still working”, dividing her time between the office and her home office. She loves Nascar and is a huge fan of Kyle Bush, baking is her passion (especially cupcakes), she is a collector of eclectic miniatures and loves to travel by train.

Jill Ostland – Jill is the newest addition to the team. Officially her title is Executive Assistant, but as she grows into the role, she will be wearing many different hats! Coming to us with administrative and customer service experience, she is always ready to assist you! Please call her with your questions or just to introduce yourself! Jill and her husband Vaughn have 3 boys and a cat! She loves to watch hockey (her favorite team is the Toronto Maple Leafs), swim Masters at 6am, play pickleball, cook, and spend time with family.

Donna Thaidigsman – Donna is a huge asset to the Cain group team as we welcome the Losnick clients to Cain Advisory Group. Always happy to jump in on any project, she is integral to ensuring a smooth transition for the Cain Advisory group team and clients alike. An avid sailor, Donna and her husband love to race their 37’ sailboat and pick up trophies as often as possible! She also enjoys traveling, reading, walking and being with friends.

Robyn Nelson Robyn Nelson has been with Cain Advisory Group since 2016 and brings a wealth of experience and expertise to the team. She’s a Certified Registered Tax Preparer and has worked intimately with people for over 25 years.  Robyn prides herself on creating and maintaining trusting, long-term relationships with every client. Robyn’s background in client relations, operations management, business administration, tax administration, accounting, contract negotiations, and effective communication makes her a true asset to our vision and goal.  Born and raised in Southern California, Robyn has travelled the world and is a proud Veteran of the U.S. Navy. She studied Business Operations Management at California State University, San Bernardino, and has lived in San Diego since 2010.  Outside of work, she loves spending time with her dog, playing piano & flute and her favorite pastime is camping!

Welcome to the Cain Advisory Group Family!

We would like to extend a special welcome to all the Losnick and Associates clients to the Cain Advisory Group family! Do not hesitate to call 858-277-2122 or email Jill@caingrouponline.com to see how we can continue to provide you with valuable and professional accounting services.

Cain Advisory Quarterly Email

Every quarter we send out emails to our clients to let them know whats going on with us. Read the latest quarterly email and get up to date on all things Cain Advisory.

2022 Q4 Email

2022 – Q4 Tax Update from the Cain Advisory Group

Hello, Cain Advisory Group Clients!

The Cain Advisory Group (CAG) has exciting news! We are thrilled to introduce to you our newest team
members and tax professionals Jay Haney and Ermeca Crawford. Joining the CAG team in October,
combined they have over 40 years of knowledge, expertise, and experience in the world of tax and look
forward to working with all our Cain Advisory Group clients.

Jay Haney is our Senior Tax Manager and is an Enrolled Agent with 30 years’ experience in tax and
accounting. He specializes in IRS representation, Real Estate investing and tax planning, prioritizing asset protection and finding opportunities for tax liability reduction for individuals and business owners alike.

Jay enjoys the complexities of tax and resolving to your tax questions! Feel free to contact Jay by email
at Jay@caingrouponline.com or connect via zoom to discuss your tax questions or concerns.

Ermeca Crawford is an Enrolled Agent with over 14 years in tax and accounting. Her attention to detail
and expert knowledge of tax law ensures that your questions will be answered effectively and
efficiently. Ermeca will be working closely with Jay and Brian preparing tax returns and completing 2022
tax analysis, planning and IRS/FTB notice resolution. Ermeca can be reached at
Ermeca@caingrouponline.com or call 858-277-2122 ext. 215.

Now that the 2021 tax season is officially over, the CAG Team is focused on 2022 tax analysis and
planning. Individual taxpayers and business owners alike have new tax reduction strategies to consider
thanks to the Tax Inflation Reduction Act signed into law this year. For example, updated this year is
Electric Vehicle (EV) credits for both new and used vehicles. If you are interested in buying an electric
vehicle, CLICK HERE to read more about the tax savings available to you.

Let us help you in finding the tax strategies that best suit your tax situation! If you are interested in 2022
tax planning and analysis, contact Jill@caingrouponline.com to schedule a time with your Cain Group

Kind regards,

Brian and the Cain Advisory Group Team