David Rambo was born in Pottstown, Pennsylvania in 1955 and raised in nearby Spring City, developing a lifelong interest in literature and art that is due in no small part to having had a mother and grandmother who were librarians.

After acting in several Philadelphia area productions, he moved to New York at 19 and appeared in musicals and plays with the Octagon Theatre Company and other off-off-Broadway companies. He supported himself by taking office work and gigs as a cabaret pianist. A music and comedy act with close friend Thea Ramsey - "On the Loose!" - was a personal joy and critical triumph, cut short by her battle with cystic fibrosis (she died in 1987 at 37).

Seeking TV and film work, David moved to Los Angeles and was rewarded with a starring role in the 1981 ABC-TV pilot "The Best of Times," co-starring with Nicolas Cage (then Coppola) and Crispin Glover. Other small TV roles followed, but the theatre remained David's passion.

He started selling real estate as a means to support a theatre career. The sales career took off, the acting career did not.

In 1993, he briefly returned to his musical roots with the off-Broadway hit HOWARD CRABTREE'S WHOOP-DEE-DOO! when the show's creator, long-time friend Crabtree, asked to use David's "Elizabeth Taylor" song in the revue. It became the hit of the show, and a standout on the 1995 BMG cast recording. In 1991, happy with the financial reward of a sales career, but unfulfilled by the grind of the house-selling game, he began spending the hours at idle open houses sketching ideas for plays on the backs of property sales brochures. The tinkering led to a first play, then another, and another.

One of these early plays was presented at the Ashland New Plays Festival in 1997. David returns to this annual festival as his schedule allows to work with emerging playwrights and teach playwriting workshops.

On a snowy February, 1998 evening in a rented cabin in the San Bernardino mountains, David typed the words "End of Play" to GOD'S MAN IN TEXAS. Agent Mary Harden liked the play and submitted it to Actors Theatre of Louisville, where it was given its world premiere a year later at the 23rd Humana Festival of New American Plays.

Productions followed at theatres all over the country, including The Old Globe, Geffen Playhouse, Cincinnati Playhouse in the Park, The Alliance Theatre, Northlight Theatre, Hippodrome Theatre, The Florida Stage (Carbonell Award - Best Play), Tennessee Rep, Arkansas Rep, Mill Mountain Playhouse and the Warehouse Theatre.

By 2002, GOD'S MAN IN TEXAS, ranked as one of the most produced plays in U.S. regional theatres. In that same year, invited to address the March conference of non profit theatres in Texas, David took the opportunity to express some of his views on theatre. For the 24th Humana Festival, David contributed a short work "Maid of Athens" to BACK STORY, an anthology play developed from a story by Joan Ackerman.

On March 30, 2003 in Los Angeles, the curtain of the Ahmanson Theatre rose on David's stage adaptation of the classic Joseph L. Mankiewicz screenplay ALL ABOUT EVE. The star-studded cast included Tim Curry, Stockard Channing, Calista Flockhart, Blythe Danner, Angela Lansbury, Kirk Douglas, Victor Garber, Carl Reiner, Jennifer Tilly, and John Ritter. The one-time only performance benefitted The Actors Fund of America. A year later for the Actors Fund, David's adaptation of the screenplay SUNSET BOULEVARD by Charles Brackett, Billy Wilder and D.H. Marshman, Jr. was presented at the Pantages Theatre in Hollywood with another star-studded cast led by Anjelica Huston, Sir Ben Kingsley, Patrick Wilson, Lauren Ambrose, Noah Wyle, Charles Durning and legendary director Stanley Donen as Cecil B. DeMille. His adaptation of CASABLANCA for the Actors Fund in 2005 starred Anne Heche, Christian Slater, Edward Hermann, Dan Castellaneta, Michael York and Andre deShields.

At the Hollywood Bowl, conductor John Mauceri and director Peter Hunt took David’s SUNSET BOULEVARD adaptation to a new level. As Betty Buckley, Len Cariou, Douglas Sills and an all-star cast performed the script, 96 musicians played Franz Waxman’s evocative original score for the film.

David adapted another classic screenplay, ADAM'S RIB by Garson Kanin and Ruth Gordon, for L.A. TheatreWorks, where it was performed in October 2003 for broadcast on National Public Radio, starring Anne Heche and Adam Arkin. L.A. TheatreWorks also produced GOD'S MAN IN TEXAS.

David’s first foray into writing for television was an episode of CSI: CRIME SCENE INVESTIGATION titled, "Butterflied." Its January 2004 premiere was the highest rated TV program of the week. He joined the CSI: writing team, and is now a producer on the show. Some of his most memorable episodes include "Who Shot Sherlock?", a Sherlock Holmes mystery; "Kiss-Kiss, Bye-Bye," which boasted a dynamic performance by guest star Faye Dunaway, and "Built to Kill, Parts 1 and 2," the spectacular Season 7 two-part season premiere that included the cast of Cirque du Soleil’s KA, singer John Mayer, Danny Bonaduce and Sean Young.

Recently, commissioned by the Geffen Playhouse, David wrote a new book for its highly successful revival of the Alan Jay Lerner and Frederick Loewe musical PAINT YOUR WAGON, directed by Gil Cates. David’s play THE LADY WITH ALL THE ANSWERS, a one-woman play based on the life and letters of Ann Landers premiered at the Old Globe in San Diego in August 2005.

THE ICE-BREAKER, a two-character play exploring the relationship between a reclusive climate scientist and an admiring acolyte, is in the midst of a "rolling world premiere" at Magic Theatre in San Francisco, Phoenix Theatre in Indianapolis and the New Rep in Cambridge. A production opened in February 2006 at the Laguna Playhouse in California. The play was co-commissioned by the Geffen Playhouse and A.S.K. Theater Projects, and developed at Denver Center Theatre’s Working Stages Program.

After 33 years together, David and Theodore Heyck were married at their Los Angeles home in 2008.

David is a member of the Dramatists Guild, ASCAP, and Writers Guild of America, West.