Heather Johnston

Managing attorney

hjohnston@sapphire.law | (949) 281-2121

Heather Johnston founded Sapphire Law Group in 2017, after practicing law at a boutique law firm in Sacramento for more than a decade. Heather first became interested in estate planning in law school, where she earned the Witkin Award in Wills & Trusts and received a Concentration in Taxation. Over the many years that she represented clients in all facets of real estate transactions, Heather developed a specific focus on planning and distributions from family trusts comprised of complex real estate portfolios and entity interests. Today, Heather uses this specific background to counsel clients with complex real estate planning, business succession planning and property tax planning opportunities. Heather is a Certified Specialist in Estate Planning, Trust and Probate Law, by the State Bar of California Board of Legal Specialization.

Amanda Cha

Paralegal

acha@sapphire.law | (916) 546-5023

Amanda Cha joined Sapphire Law Group in January of 2020. Amanda learned how to serve the firm and its clients during a pandemic, navigating work from home schedules, urgent client needs, and even greater reliance on the firm’s already prolific technology platforms. During this time, Amanda also attended school full time to obtain her Paralegal Certificate. Amanda has continued to grow and thrive in a paralegal position.

Jenna Cohen

Paralegal

jcohen@sapphire.law | (949) 281-2121

Jenna Cohen is a Trust and Estate Paralegal with over 17 years of legal experience. She assists attorneys with estate plan drafting, trust administrations, probate proceedings, and related court petitions, bringing strong procedural knowledge and attention to detail to each matter.

A California native now living in Texas, Jenna enjoys spending time with her husband and three daughters, cooking, and being outdoors.

Kathleen Emert

Client Support Assistant

kemert@sapphire.law | (949) 281-2121

Kathleen joined Sapphire Law Group in June 2025 with more than 15 years of experience in administration, accounting, client service, and human resources. A natural team player, she takes pride in lightening the load for her colleagues so they can focus on what they do best. Known for her keen attention to detail and love of organization, Kathleen also brings warmth and good humor to every interaction, helping to lift up those around her.

Antoinette Johnson

Client Support and Marketing Assistant

ajohnson@sapphire.law | (949) 281-2121

Antoinette Johnson has an educational background in journalism and a professional background in digital marketing and branding, with an emphasis on project management and administrative operations. She has worked with a range of business owners and agencies, helping them streamline their systems, enhance organization, and support sustainable growth. Antoinette is passionate about building structure behind creative visions and ensuring projects move forward with clarity and momentum.

Christina Jones

Client Support Assistant

cjones@sapphire.law | (949) 281-2121

Since joining the firm in February 2026, Christina brings over four years of administrative experience supporting busy professionals in a variety of industries. She is detail-oriented, organized, and enjoys keeping things running smoothly behind the scenes.

Christina values clear communication and a welcoming approach, helping clients feel comfortable and supported throughout their experience with the firm. She is committed to thoughtful, reliable support for both clients and attorneys alike.

Kenny Johnston

Firm administrator / Software Engineer

kjohnston@sapphire.law | (949) 281-2121

Kenny brings a unique combination of skills to Sapphire Law Group. He has two decades of experience creating and managing technology for law firms and legal services providers. He has led countless software development projects, managed distributed teams and written software used by hundreds of law firms to streamline their operations, information management and integrations with various platforms.