OPINION
{1} In this ease, we decide whether the trial court correctly determined that Plaintiff Ronald DeArmond (DeArmond) and Defendant Halliburton Energy Services, Inc., (Halliburton) entered into a valid contract agreeing to arbitrate work-related problems, thus waiving any right to a jury trial on these issues. We hold that the record is not sufficient to support the trial court’s decision, and we therefore reverse the trial court’s order granting Halliburton’s motion to compel arbitration. We remand for reconsideration of Halliburton’s motion.
I. BACKGROUND
{2} DeArmond was employed by Halliburton as a senior equipment operator. In November 1998, he was injured on the job; and as a result, he needed surgery to correct a torn pectoral muscle. DeArmond requested the necessary leave from Halliburton. In January 1999, Halliburton laid DeArmond off, and his health benefits were terminated.
{3} DeArmond sued Halliburton on February 2, 2000, in state district court. The suit alleged (1) discrimination based on race and medical condition in violation of Title VII of the Civil Rights Act of 1964, as amended, 42 U.S.C. § 2000e to -17 (2000), and the New Mexico Human Rights Act, NMSA 1978, §§ 28-1-10 to -15 (1969, as amended through 1995); (2) breach of implied employment contract; and (3) abusive discharge. Halliburton removed the case to federal court on April 18, 2000. DeArmond amended his complaint to dismiss the federal claim and secured a remand to state district court on September 19, 2000. On August 14, 2001, Halliburton filed its motion to compel arbitration, asserting that its arbitration agreement with DeArmond was enforceable under the Federal Arbitration Act (FAA), 9 U.S.C. §§ 1-16 (2000), and, alternatively, the New Mexico Uniform Arbitration Act, NMSA 1978, §§ 44-7-1 to -22 (1971) (Act). Although DeArmond requested a hearing, the trial court made its decision based on the pleadings and affidavits without entering specific findings of fact. The trial court did not address the question of whether the agreement was governed by the federal and/or state arbitration statutes.
II. DISCUSSION
A. Standard of Review
{4} The trial court held no evidentiary hearing and made no findings or conclusions; therefore, it appears the trial court determined as a matter of law that an agreement to arbitrate existed. In this regard, the court’s order compelling arbitration was similar in nature to a grant of a summary judgment motion. Par-Knit Mills, Inc. v. Stockbridge Fabrics Co.,
B. The Arbitration Agreement
{5} In late 1997, Halliburton adopted a company-wide Dispute Resolution Program (DRP) with an effective date of January 1, 1998. Thereafter, in November 1997, Halliburton mailed a notice of the DRP to all employees at their addresses of record. The mailing included a memorandum, a twenty-two-page Plan Document, the DRP Rules, a summary brochure, and a cover letter of explanation. The cover letter stated that “[t]he Halliburton Dispute Resolution Program binds the employee and the Company to handle workplace problems through a series of measures designed to bring timely resolution.” The memorandum further explained that as of January 1, 1998, all “Halliburton employee disputes” would be referred through the DRP for resolution, that both Halliburton and DeArmond would be bound by the agreement, and that “[y]our decision to ... continue your current employment after January 1,1998 means you have agreed to and are bound by the terms of this Program as contained in the Plan Document and Rules (all enclosed).” DeArmond continued employment after January 1,1998.
{6} Halliburton, on appeal, drops its alternative argument that the DRP is enforceable under the Act. Since DeArmond neither contests application of the FAA nor argues for application of the Act, we proceed under the assumption that the FAA governs.
{7} A primary purpose of the FAA is to require courts to compel arbitration in cases where the parties agree to arbitrate; the law was enacted “to reverse the longstanding judicial hostility to arbitration agreements that had existed at English common law and had been adopted by American courts, and to place arbitration agreements upon the same footing as other contracts.” Gilmer v. Interstate/Johnson Lane Corp.,
[a] written provision in ... a contract evidencing a transaction involving commerce to settle by arbitration a controversy thereafter arising out of such contract or transaction ... shall be valid, irrevocable, and enforceable, save upon such grounds as exist at law or in equity for the revocation of any contract.
9 U.S.C. § 2. Section 2 of the FAA “is a congressional declaration of a liberal federal policy favoring arbitration agreements[J” Moses H. Cone Mem’l Hosp. v. Mercury Constr. Corp.,
{8} However, a legally enforceable contract is still a prerequisite for arbitration; without such a contract, parties will not be forced to arbitrate. First Options of Chicago, Inc. v. Kaplan,
{9} Whether a valid contract to arbitrate exists is a question of state contract law. First Options of Chicago, Inc.,
{10} DeArmond contends that Halliburton has not proven the existence of a valid, enforceable agreement to arbitrate. Specifically, he argues that three elements essential to a contract are missing: acceptance, consideration, and mutual assent. We agree that there is an absence of proof of acceptance and mutuality; we therefore need not address DeArmond’s arguments concerning consideration.
1. Acceptance
{11} A pivotal issue in this case is whether DeArmond accepted the modification of his existing employment contract when he continued to work after January 1, 1998. Acceptance of an agreement is essential for the agreement to be binding. Medina v. Sunstate Realty, Inc.,
{12} Halliburton urges us to apply our holding in Stieber v. Journal Publ’g Co.,
{13} There is a critical distinction between Stieber and this case. In Stieber, there was no question that the employee had knowledge of the change in job assignments. Therefore, Stieber does not stand for the proposition that a prospective modification of an at-will employment contract may be accepted by continued employment when the employee does not have actual knowledge of the offer.
{14} The question, therefore, is whether DeArmond had actual knowledge of Halliburton’s offer and Halliburton’s invitation that the offer be accepted by performance. DeArmond argues that Halliburton has not shown that DeArmond received the DRP materials or that he read or understood their contents. We observe that Halliburton did not provide an arbitration agreement for DeArmond to sign, nor is there an acknowledgment form indicating that he received or read the documents. DeArmond’s argument is, in essence, that without a showing that he knew about the proposed new contract terms, there can be no proof that he accepted the offer. We agree.
{15} Halliburton correctly asserts that under New Mexico law, materials mailed to a correct address are presumed to have been received. Garmond v. Kinney,
{16} Without citing authority, Halliburton further suggests it is entitled to presume employees read the materials sent to them. New Mexico law does impose a duty upon the parties to a contract to read and familiarize themselves with its contents before they sign and deliver it. Ballard v. Chavez,
{17} We base our analysis on general contract law. A trier of fact must first be able to determine that the party performing an act was aware of the offer and aware that his conduct could constitute acceptance. Restatement § 19(2) (“The conduct of a party is not effective as a manifestation of his assent unless he ... knows or has reason to know that the other party may infer from his conduct that he assents.”); 1 Arthur Linton Corbin & Joseph M. Perillo, Corbin on Contracts § 3.5, at 326-28 (rev. ed. 1993 & Supp.2003) (discussing knowledge of the offer as a prerequisite to acceptance and stating that the prerequisite “is quite logical and is consistent with the assumption that ‘contract’ requires conscious assent to terms proposed by another.”). We recognize that the type and extent of knowledge required varies, depending on the context. See, e.g., In re Estate of Duran,
{18} We believe the principle of conscious assent is particularly crucial in the at-will employment context, where acceptance may be manifested by continuing in a routine activity. In order to ascertain whether the employee consciously assented by continuing to work, there must be proof that the employee actually knew of the offer and was aware that remaining on the job constituted acceptance. See National Rifle Ass’n v. Ailes,
{19} We are aware of at least two other jurisdictions that have held Halliburton employees bound to arbitration agreements when the employees continued to work after receiving DRP materials in the mail. In re Halliburton Co.,
2. Mutual Assent
{20} In addition to the absence of proof as to acceptance, the record reveals a lack of proof as to mutuality. A binding contract requires mutual assent. Garcia,
{21} Halliburton contends that if we determine DeArmond did not accept the arbitration agreement by his continued employment, we will eviscerate New Mexico’s at-will employment doctrine. We disagree. Our holding in Stieber stands: An employer may still insist on prospective changes in the terms of employment as a condition of continued employment. Continued employment, however, will not constitute acceptance, unless the employer proves that the employee actually knew of the modification. In Stieber, actual knowledge of the prospective modification was not an issue because there was no question that the employee knew of the modification in job assignments and was challenging the employer’s right to make the modification.
{22} Halliburton also urges us to reject a “heightened ‘knowing and voluntary’ standard for a party’s waiver of jury trial in favor of arbitration^]” Because Halliburton has not proven that DeArmond even knew of the arbitration agreement, we do not consider this issue.
III. PROCEDURE
{23} We consider the trial court’s order as similar to the grant of a summary judgment motion on this issue. Accordingly, we reverse the trial court’s grant of Halliburtoii’s motion to compel arbitration, and we remand for the trial court to consider the matter in light of our clarification that Halliburton must prove DeArmond had actual knowledge of the offer to arbitrate and of Halliburton’s invitation to accept the offer by continued employment. Because the resolution of DeArmond’s other issues regarding lack of consideration and waiver must wait for a determination of this preliminary issue, we direct the trial court to address these remaining issues as necessary.
{24} IT IS SO ORDERED.
