Emerald Isle Senior Apartment Homes
Park Mesa Villas
Emerald Isle Senior Apartment Homes
Villa Buena Apartment Homes
Crown Building


G Companies is a successful Southern California based single and multi-family real estate development and property management company. G Companies is comprised of three operating divisions: Three G Development, Mesa Management and Rockshore Investments. Each of these divisions is uniquely qualified in their respective fields.

  • Jim Gianulias

  • David Gianulias

  • Steve Mensinger

    President, Mesa Management
  • Jason Miller

    Corporate Controller, Mesa Management
  • Cort Ensign

    Director of Commercial Leasing, Mesa Management
  • Aaron Schmitt

    Director of Construction Facilities and Maintenance, Mesa Management
  • Donna Radack

    Director of Human Resources, Mesa Management
  • Laura Ramirez, ARM, CPM Candidate

    Regional Manager, Mesa Management
  • Justin McColgan

    Director of Sales, Levendi Winery
  • Lillian Norminton

    Director of Operations, Levendi Winery
  • Michael Buskey

    Managing Partner - Capital Markets
  • Ruth Snyder

    Director of Compliance, Levendi Winery & Project Manager for Homebuilding Construction & Special Projects

Jim Gianulias


James C. Gianulias was born and raised in Sacramento, California. He graduated from the University of California, Berkeley with a BA degree in 1962. While attending Cal he played baseball and football.

He is married to Janet and has two children, David and Mindy. His hobbies include fishing, hunting, skiing and golfing.

Jim's core business is as Chairman of the Board of Cameo Homes, Gianulias Companies Construction, Inc., Mesa Management, Inc., and Levendi Winery, which he received a gold and silver medal at the Los Angeles County Fair in 2006. He has been involved in the development and management of properties in California, Hawaii, Nevada, and New York for over 31 years. He is currently involved with growing grapes in Napa Valley, California, as well as coffee in Kona, Hawaii.

Jim currently resides in Newport Coast, California. He is involved with the Chancellor's Club and Thesaurus Linguae Graecae at University of California, Irvine. He is a member of the Paul Merage Graduate School Center of Real Estate and TLG at the University of California, Irvine.

David Gianulias


A graduate of the University of California, Santa Barbara, Mr. Gianulias began his career with his sights set on law and real estate development. Inspired by a lifetime of summers working on construction sites in customer service and sales, Mr. Gianulias returned to his roots of Newport Beach eager to contribute to the family business of real estate development. In 1995, Gianulias created Cal Star Development.

Cal Star was created in order to capitalize on the abundance of foreclosures on the market from the early 1990's recession. Working with HUD and a non-profit church group, Cal Star Development was able to obtain properties at $.20 - $.25 on the dollar in order to create affordable housing called "The American Dream" program. Focused mainly on duplexes/four-plexes, approximately 70% of the time, they were able to select a responsible tenant currently in the property, clean up their credit and keep them in the home. The company created opportunities for first-time buyers from South Central LA to Riverside and San Bernardino Counties.

A third generation homebuilder, in 1996 Mr. Gianulias joined G Companies homebuilding division, Silver Oaks Communities adding to the more than 60,000 homes built and sold by his grandfather, Charley Hester. From 1998 to present, Mr. Gianulias' insight into market branding, development project planning and residential sales have put Silver Oaks Communities on the map of the Southern California's Inland Empire. Under Mr. Gianulias' guidance, Silver Oaks Communities successfully purchased, entitled, constructed and sold thousands of homes. With a focus on product positioning and market niche, Mr. Gianulias and team, annually captured an increasing share of the home-buying consumer segmentation.

In January 2007, Mr. Gianulias took the reins and was appointed President of G Companies. He now oversees all facets of "G" and brings his considerable experience to the leadership of Three G Development, LLC.

Ruth Snyder

Director of Compliance, Levendi Winery and Project Manager for Homebuilding Construction and Special Projects

Ruth Snyder joined G Companies in 2005 and over the years she has been relied on to wear several hats within the corporation. Currently she is the Director of Compliance for Levendi Winery, while also serving as Project Administration Manager for special projects and Project Manager for the homebuilding division.

Ruth's professional career spans 2 decades in the Real Estate industry, with her first 10 years focusing on multi-family property management. She started in the multi-family industry working for Winthrop Corporation in the State of Arizona as a Leasing Consultant and then Assistant Business Manager. Upon her return to her home state of California she quickly rose up the corporate ladder in the multi-family industry, becoming a Regional Manager, then TCAC Compliance Coordinator and finally Executive Assistant with Bertram Partners.

Ruth was first hired at G Companies as an Executive Assistant to Jim Gianulias, the founder of Cameo Homes and G Companies. She was promoted to Administration Manager, where she managed the compliance of business entities, contracts, and insurance for the Mesa Management and G Companies Homebuilding portfolio. In 2009 Ruth took on the added role of Assistant Project Manager for Three G Development, where she was involved in all aspects of homebuilding, from planning, budgeting, contract administration and reconciliation, to BRE and sales coordinator for developer.

Ruth is a Cum Laude graduate of Irvine Valley College, with an associate degree in Psychology. Her love for learning and accomplishments has been her formula for success.

Steve Mensinger

President, Mesa Management

Steve Mensinger joined Newport Beach based Mesa Management in 2014 and is the President of Real Estate Operations. Mesa Management's portfolio includes apartments, offices, retail and senior living communities. Mesa Management has been a leader in real estate management, redevelopment and entitlement for over 40 years.

Steve Mensinger's professional career spans almost three decades as a leader in real estate, business, and politics. Steve also served the City of Costa Mesa's for 10 years as Counsel Member and Mayor, giving him a unique understanding of the interaction between public policy and private investment.

Steve had served in executive positions with both Arnel Management and the SunCal companies. Steve has been deeply committed to his community, serving on the Boards of dozens of local and national organizations including: the South Coast Apartment Association, the South Coast Metro Alliance, Girls Inc., Boy Scouts of America, the Orange County Sheriff's Department, the Orange County Sheriff's Advisory Council, Costa Mesa Pop Warner, Estancia Sports Boosters Club, OC Vector Control District, and Costa Mesa United. Steve is a USC alumnus and a member of the Sigma Chi Fraternity.

Aaron Schmitt

Director of Construction Facilities and Maintenance, Mesa Management

Aaron Schmitt joined Mesa Management in 2017 as the Director of Construction Facilities and Maintenance. Aaron’s professional career spans almost 3 decades as a construction professional in Residential Construction, Commercial Construction and Construction Management. Previously, Aaron owned and operated his own general contracting business providing him extensive experience in residential, commercial and restaurant construction. Aaron’s experience also includes working with the reputable builder, John Laing Homes LLC as a Construction Manager/Superintendent for multiple master planned communities throughout the Southern California Region. Aaron has acquired multiple company achievement awards for exceptional construction management and leadership.

Aaron currently resides in Costa Mesa with wife, Julie and two sons. He has been actively involved in coaching, mentoring and volunteering with Pop Warner football, and high school football.

Donna Radack

Director of Human Resources, Mesa Management

Donna Radack joined Mesa Management in July of 2013. Ms. Radack has over 20 years of experience in the areas of payroll management, benefit administration, employee life-cycle processing and human resources management. Ms. Radack has worked in a Director position in a variety of Orange County based businesses and industries including Steelcase (Seal Furniture franchisee), OptionEase/ Solium Capital, Hometown National Bank and Taco Bell.

Ms. Radack has a proven ability to identify problems, determine cause and create effective resolutions. She has a solid background as an established employee/employer advocate for problem resolution and strives to maintain a positive, productive and legally compliant work environment free of harassment and discrimination. Ms. Radack attended California State University Fullerton and is currently working towards obtaining her PHR (Professional Human Resources) certification. Ms. Radack is an active member of the Society for Human Resource Management, Professionals in Human Resource Association and National Human Resource Association.

Jason Miller

Corporate Controller, Mesa Management

Jason Miller joined Mesa Management in July of 2014 as the Corporate Controller. He will be responsible for the accounting team which will oversee the financial reporting for the apartments, office, retail and senior living communities that Mesa Management manages, as well as, the financing activities. Mr. Miller has 13 years of property management experience in the areas of accounting, finance and financial reporting. He has been responsible for portfolios that included multi-family, office, retail and industrial. Previously, Mr. Miller worked for Thompson National Properties, LLC as a Portfolio Controller, Grubb and Ellis Realty Investors, LLC as a Vice President-Controller of Asset Management, CB Richard Ellis as an Assistant Controller, and Kodak Processing Labs, Inc. as a Financial Analyst. Mr. Miller earned his Bachelor of Arts in Business Administration with an emphasis in Accounting from California State University Fullerton in 1993.

Cort Ensign

Director of Commercial Leasing, Mesa Management

Cort Ensign has been involved in the multifamily and commercial property management industry since 1989. Having built a highly successful property management software and consulting business around the AMSI line of accounting products. Working with many of the largest market leading property management companies in the West, Cort has been actively involved in helping them become innovators and market leaders. Cort brings his unique insights to Mesa to help it achieve market leadership.

Laura Ramirez, ARM, CPM Candidate

Regional Manager, Mesa Management

Laura Ramirez joined Mesa Management in August of 2013. Ms. Ramirez has 25 years of property management experience, including positions held as Regional Manager, District Manager as well as multiple on-site management roles. Ms. Ramirez has held management positions within locally and nationally known real estate companies: Lincoln Properties, GMH Communities, BRE, Place Properties, Western National Group and currently with Mesa Management.

Ms. Ramirez experience includes multifamily residential management, student housing, 55+ senior living communities, subsidized housing programs, mixed-use buildings and new construction lease up. Ms. Ramirez received her Accredited Residential Manager (ARM) designation in 2006 and currently holds her real estate license since 2010. She is currently pursuing her CPM designation through IREM.

Justin McColgan

Director of Sales, Levendi Winery

Justin McColgan serves as the Director of Sales at Levendi Winery and is involved in all aspects of the business. He leads both sales and marketing teams nationally. Justin has helped Levendi grow in various new markets, increase production and build sales, leading to the highly accolated Levendi selling out yearly. Justin is also a partner in the Aga Vie Espirit D'Agave and Hooligans Irish Whiskey spirit brands.

Prior to working with Levendi, Justin owned a property development company in London. He has a Bachelor of Business Studies from the University of Ulster in Ireland, where he is from, and is also a certified Sommelier.

Lillian Norminton

Director of Operations, Levendi Winery

Lillian has been with the Levendi and the G Companies family since 2004. Her current position is Director of Operations for Levendi Winery, which entails overseeing the day to day activities for the winery business. Lillian oversees the wholesale and direct shipments of Levendi throughout the United States, and ensures that all divisions of the Levendi are working cohesively in order to maximize productivity and profits.

Prior to joining Levendi, Lillian worked for various Orange County real estate developers and interior designers managing their business operations.

Lillian is an Orange County native and graduate from Cal State Long Beach. Since joining Levendi, Lillian has succeeded in becoming a Level 1, Sommelier and has also completed the Level 3 Certification from Wine & Spirits Education Trust.

Micheal Buskey

Managing Partner - Capital Markets

Michael Buskey was born and raised in Orange, California. He graduated from the Polygenic University of California, with a BS degree in Engineering and Kimpo College, AnYang Korea with Master's Degree in Computer Electronics.

He is married with 4 children and 9 grandchildren. His hobbies include coaching, mentoring and enjoying great gourmet food from his bride Deborah.

Mike's main focus with Three G is developing partnerships with capital, programs and projects for elevated profits for the overall corporation. He has been involved in the development and management of properties and fund development aboard as well as the development of technology companies in education, automotive and health industries.

Mike currently resides in Irvine, California. He is involved with the 'House of Peace' offering a safe haven and mentoring for at risk children in several parts of the world.